Name: NXP Semiconductors LPC1768
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User manual Rev. 3 — 19 December 2013 24 of 841

NXP Semiconductors

UM10360

Chapter 3: LPC176x/5x System control

3.6 External interrupt inputs

TheLPC176x/5x includes four External Interrupt Inputs as selectable pin functions. The

logic of an individual external interrupt is represented in Figure 6

. In addition, external

interrupts have the ability to wake up the CPU from Power-down mode. Refer to

Section 4.8.8 “

Wake-up from Reduced Power Modes” for details.

Fig 6. External interrupt logic

Interrupt flag

(one bit of EXTINT)

write to EXTINTi

internal reset

EINTi to wakeup timer

EINTi pin

EXTMODEi

PCLK

to interrupt

controller

EXTPOLARi

EINTi interrupt enable

PCLK

GLITCH

FILTER

APB read

of EXTINTi

100621

Chapter 1: Lpc176X/5X Introductory Information4
Introduction4
Features5
Applications7
Ordering Information8
- Part Options Summary8
Simplified Block Diagram9
Chapter 35 : Supplementary Information10
Architectural Overview10
ARM Cortex-M3 Processor10
- Cortex-M3 Configuration Options10
  - System Options10
  - Debug Related Options11
On-Chip Flash Memory System11
On-Chip Static RAM11
Block Diagram12
Chapter 2: Lpc176X/5X Memory Map13
Memory Map and Peripheral Addressing13
Memory Maps13
APB Peripheral Addresses15
Memory Re-Mapping16
- Boot ROM Re-Mapping16
AHB Arbitration16
Bus Fault Exceptions16
Chapter 3: Lpc176X/5X System Control18
Introduction18
Pin Description18
Register Description19
Reset19
- Reset Source Identification Register (RSID - 0X400F C180)22
Brown-Out Detection23
External Interrupt Inputs24
- Register Description25
Other System Controls and Status Flags29
- System Controls and Status Register (SCS - 0X400F C1A0)29
Chapter 4: Lpc176X/5X Clocking and Power Control30
Summary of Clocking and Power Control Functions30
Register Description31
Oscillators32
- Internal RC Oscillator32
- Main Oscillator32
- RTC Oscillator34
Clock Source Selection Multiplexer35
- Clock Source Select Register (CLKSRCSEL - 0X400F C10C)35
PLL0 (Phase Locked Loop 0)36
- PLL0 Operation36
- PLL0 and Startup/Boot Code Interaction36
- PLL0 Register Description37
- PLL0 Control Register (PLL0CON - 0X400F C080)37
- PLL0 Configuration Register (PLL0CFG - 0X400F C084)38
- PLL0 Status Register (PLL0STAT - 0X400F C088)39
- PLL0 Interrupt: PLOCK040
- PLL0 Modes40
- PLL0 Feed Register (PLL0FEED - 0X400F C08C)41
- PLL0 and Power-Down Mode41
- PLL0 Frequency Calculation41
- Procedure for Determining PLL0 Settings43
- Examples of PLL0 Settings44
- PLL0 Setup Sequence47
PLL1 (Phase Locked Loop 1)48
- PLL1 Register Description48
- PLL1 Control Register48
  - C0A0)49
- PLL1 Configuration Register (PLL1CFG - 0X400F C0A4)50
- PLL1 Status Register (PLL1STAT - 0X400F C0A8)50
- PLL1 Modes51
- PLL1 Interrupt: PLOCK151
- PLL1 Feed Register52
  - C0Ac)52
- PLL1 and Power-Down Mode52
- PLL1 Frequency Calculation53
- Procedure for Determining PLL1 Settings53
Clock Dividers55
- CPU Clock Configuration Register (CCLKCFG - 0X400F C104)55
- USB Clock Configuration Register (USBCLKCFG - 0X400F C108)56
- Peripheral Clock Selection Registers 0 and 157
Power Control59
- Sleep Mode59
  - Deep Sleep Mode59
- Power-Down Mode60
- Deep Power-Down Mode61
- Peripheral Power Control61
- Register Description61
- Power Mode Control Register (PCON - 0X400F C0C0)62
- Encoding of Reduced Power Modes63
  - Wake-Up from Reduced Power Modes63
- Power Control for Peripherals Register (PCONP - 0X400F C0C4)63
- Power Control Usage Notes65
- Power Domains65
Wake-Up Timer66
External Clock Output Pin67
- Clock Output Configuration Register67
Chapter 5: Lpc176X/5X Flash Accelerator69
Introduction69
Flash Accelerator Blocks69
- Flash Memory Bank69
- Flash Programming Issues70
Register Description70
Flash Accelerator Configuration Register71
Operation71
Chapter 6: Lpc176X/5X Nested Vectored Interrupt Controller (NVIC)73
Features73
Description73
Interrupt Sources73
Vector Table Remapping76
- Examples76
Register Description77
- Interrupt Set-Enable Register 0 Register (ISER0 - 0Xe000 E100)78
- Interrupt Set-Enable Register 1 Register (ISER1 - 0Xe000 E104)79
- Interrupt Clear-Enable Register 0 (ICER0 - 0Xe000 E180)80
- Interrupt Clear-Enable Register 1 Register (ICER1 - 0Xe000 E184)81
- Interrupt Set-Pending Register 0 Register (ISPR0 - 0Xe000 E200)82
- Interrupt Set-Pending Register 1 Register (ISPR1 - 0Xe000 E204)83
  - (ICPR0 - 0Xe000 E280)84
- Interrupt Clear-Pending Register 1 Register85
  - (ICPR1 - 0Xe000 E284)85
- Interrupt Active Bit Register 0 (IABR0 - 0Xe000 E300)86
- Interrupt Active Bit Register 1 (IABR1 - 0Xe000 E304)87
- Interrupt Priority Register 0 (IPR0 - 0Xe000 E400)88
- Interrupt Priority Register 1 (IPR1 - 0Xe000 E404)88
- Interrupt Priority Register 2 (IPR2 - 0Xe000 E408)88
- Interrupt Priority Register 3 (IPR3 - 0Xe000 E40C)89
- Interrupt Priority Register 4 (IPR4 - 0Xe000 E410)89
- Interrupt Priority Register 5 (IPR5 - 0Xe000 E414)89
- Interrupt Priority Register 6 (IPR6 - 0Xe000 E418)90
- Interrupt Priority Register 7 (IPR7 - 0Xe000 E41C)90
- Interrupt Priority Register 8 (IPR8 - 0Xe000 E420)90
- Software Trigger Interrupt Register (STIR - 0Xe000 EF00)91
Chapter 7: Lpc176X/5X Pin Configuration92
Lpc176X/5X Pin Configuration92
Lpc176X/5X Pin Description95
Chapter 8: Lpc176X/5X Pin Connect Block105
How to Read this Chapter105
Description105
Pin Function Select Register Values105
- Multiple Connections106
Pin Mode Select Register Values106
- Function of PINMODE in Open Drain Mode107
Register Description108
- Pin Control Module Register Reset Values108
- Pin Function Select Register 0 (PINSEL0 - 0X4002 C000)109
- Pin Function Select Register 1 (PINSEL1 - 0X4002 C004)109
- Pin Function Select Register 2 (PINSEL2 - 0X4002 C008)110
- Pin Function Select Register 3 (PINSEL3 - 0X4002 C00C)110
- Pin Function Select Register 4 (PINSEL4 - 0X4002 C010)111
- Pin Function Select Register 7 (PINSEL7 - 0X4002 C01C)112
- Pin Function Select Register 9 (PINSEL9 - 0X4002 C024)112
- Pin Function Select Register 10 (PINSEL10 - 0X4002 C028)112
  - Pin Mode Select Register 0 (PINMODE0 - 0X4002 C040)113
- Pin Mode Select Register 1 (PINMODE1 - 0X4002 C044)113
- Pin Mode Select Register 2 (PINMODE2 - 0X4002 C048)114
- Pin Mode Select Register 3 (PINMODE3 - 0X4002 C04C)114
- Pin Mode Select Register 4 (PINMODE4 - 0X4002 C050)115
- Pin Mode Select Register 7 (PINMODE7 - 0X4002 C05C)116
- Pin Mode Select Register 9 (PINMODE9 - 0X4002 C064)116
- Open Drain Pin Mode Select Register 0 (PINMODE_OD0 - 0X4002 C068)116
- Open Drain Pin Mode Select Register117
  - (PINMODE_OD1 - 0X4002 C06C)117
- Open Drain Pin Mode Select Register 2 (PINMODE_OD2 - 0X4002 C070)118
- Open Drain Pin Mode Select Register 3 (PINMODE_OD3 - 0X4002 C074)119
- Open Drain Pin Mode Select Register 4 (PINMODE_OD4 - 0X4002 C078)119
- C Pin Configuration Register (I2CPADCFG - 0X4002 C07C)120
Chapter 9 : Lpc176X/5X General Purpose Input/Output (GPIO)121
Basic Configuration121
Features121
- Digital I/O Ports121
- Interrupt Generating Digital Ports121
Applications122
Pin Description122
Register Description123
- GPIO Port Direction Register Fioxdir (FIO0DIR to FIO4DIR- 0X2009 C000 to 0X2009 C080)124
- GPIO Port Output Set Register Fioxset (FIO0SET to FIO4SET - 0X2009 C018 to 0X2009 C098)125
- GPIO Port Output Clear Register Fioxclr (FIO0CLR to FIO4CLR- 0X2009 C01C to 0X2009 C09C)127
- GPIO Port Pin Value Register Fioxpin (FIO0PIN to FIO4PIN- 0X2009 C014 to 0X2009 C094)128
- Fast GPIO Port Mask Register Fioxmask (FIO0MASK to FIO4MASK - 0X2009 C010 to 0X2009 C090)130
- GPIO Interrupt Registers132
- GPIO Overall Interrupt Status Register (Iointstatus - 0X4002 8080)132
- GPIO Interrupt Enable for Port 0 Rising Edge (Io0Intenr - 0X4002 8090)132
- GPIO Interrupt Enable for Port 2 Rising Edge (Io2Intenr - 0X4002 80B0)133
- GPIO Interrupt Enable for Port 0 Falling Edge (Io0Intenf - 0X4002 8094)134
- GPIO Interrupt Enable for Port 2 Falling Edge (Io2Intenf - 0X4002 80B4)135
- GPIO Interrupt Status for Port 0 Rising Edge Interrupt (Io0Intstatr - 0X4002 8084)136
- GPIO Interrupt Status for Port 2 Rising Edge Interrupt (Io2Intstatr - 0X4002 80A4)137
- GPIO Interrupt Status for Port 0 Falling Edge Interrupt (Io0Intstatf - 0X4002 8088)137
- GPIO Interrupt Status for Port 2 Falling Edge Interrupt (Io2Intstatf - 0X4002 80A8)138
- GPIO Interrupt Clear Register for Port 0 (Io0Intclr - 0X4002 808C)139
- GPIO Interrupt Clear Register for Port 2 (Io2Intclr - 0X4002 80AC)140
GPIO Usage Notes141
- Example: an Instantaneous Output of 0S and 1S on a GPIO Port141
- Writing to FIOSET/FIOCLR Vs. FIOPIN141
Chapter 10: Lpc176X/5X Ethernet142
Basic Configuration142
Introduction142
Features143
Architecture and Operation144
DMA Engine Functions145
Overview of DMA Operation145
Ethernet Packet146
Overview147
- Partitioning147
- Example PHY Devices148
Pin Description148
Registers and Software Interface149
- Register Map149
Ethernet MAC Register Definitions151
- MAC Configuration Register 1 (MAC1 - 0X5000 0000)151
- MAC Configuration Register 2 (MAC2 - 0X5000 0004)151
- Back-To-Back Inter-Packet-Gap Register (IPGT - 0X5000 0008)153
- Non Back-To-Back Inter-Packet-Gap Register (IPGR - 0X5000 000C)153
- Collision Window / Retry Register (CLRT - 0X5000 0010)154
- Maximum Frame Register (MAXF - 0X5000 0014)154
- PHY Support Register (SUPP - 0X5000 0018)154
- Test Register (TEST - 0X5000 001C)154
- MII Mgmt Configuration Register (MCFG - 0X5000 0020)155
- MII Mgmt Command Register156
  - 0X5000 0024)156
- MII Mgmt Address Register156
  - 0X5000 0028)156
- MII Mgmt Write Data Register156
  - 0X5000 002C)156
- MII Mgmt Read Data Register157
  - 0X5000 0030)157
- MII Mgmt Indicators Register157
- 0X5000 0034)157
  - Station Address 0 Register158
- Station Address 1 Register158
- Station Address 2 Register158
Control Register Definitions159
- Command Register (Command - 0X5000 0100)159
- Status Register (Status - 0X5000 0104)159
- Receive Descriptor Base Address Register (Rxdescriptor - 0X5000 0108)160
- Receive Status Base Address Register (Rxstatus - 0X5000 010C)160
- Receive Number of Descriptors Register (Rxdescriptor - 0X5000 0110)160
- Receive Produce Index Register (Rxproduceindex - 0X5000 0114)161
- Receive Consume Index Register (Rxconsumeindex - 0X5000 0118)161
- Transmit Descriptor Base Address Register (Txdescriptor - 0X5000 011C)162
- Transmit Status Base Address Register (Txstatus - 0X5000 0120)162
- Transmit Number of Descriptors Register (Txdescriptornumber - 0X5000 0124)162
- Transmit Produce Index Register (Txproduceindex - 0X5000 0128)163
- Transmit Consume Index Register (Txconsumeindex - 0X5000 012C)163
- Transmit Status Vector 0 Register163
  - 0X5000 0158)163
- Transmit Status Vector 1 Register164
  - 0X5000 015C)164
- Receive Status Vector Register165
  - 0X5000 0160)165
- Flow Control Counter Register (Flowcontrolcounter - 0X5000 0170)166
- Flow Control Status Register166
  - 0X5000 0174)166
Receive Filter Register Definitions167
- Receive Filter Control Register167
  - 0X5000 0200)167
- Receive Filter Wol Status Register167
- Receive Filter Wol Clear Register (Rxfilterwolclear - 0X5000 0208)168
- Hash Filter Table Lsbs Register (Hashfilterl - 0X5000 0210)168
- Hash Filter Table Msbs Register169
  - 0X5000 0214)169
Module Control Register Definitions169
- Interrupt Status Register169
  - 0X5000 0FE0)169
- Interrupt Enable Register170
  - 0X5000 0FE4)170
  - 0Fe8)170
- Interrupt Set Register (Intset - 0X5000 0FEC)171
- Power-Down Register172
  - 0X5000 0FF4)172
Descriptor and Status Formats173
- Receive Descriptors and Statuses173
- Transmit Descriptors and Statuses176
Ethernet Block Functional Description178
- Overview178
- AHB Interface179
Interrupts179
- Direct Memory Access (DMA)179
- Initialization182
- Transmit Process183
- Receive Process189
- Transmission Retry195
- Status Hash CRC Calculations195
- Duplex Modes196
- IEE 802.3/Clause 31 Flow Control196
- Half-Duplex Mode Backpressure198
- Receive Filtering199
- Power Management201
- Wake-Up on LAN201
- Enabling and Disabling Receive and Transmit203
- Transmission Padding and CRC205
- Huge Frames and Frame Length Checking206
- Statistics Counters206
- MAC Status Vectors206
- Reset207
- Ethernet Errors208
AHB Bandwidth209
- DMA Access209
- Types of CPU Access210
- Overall Bandwidth210
CRC Calculation212
Chapter 11 : Lpc176X/5X USB Device Controller214
How to Read this Chapter214
Basic Configuration214
Introduction214
Features215
Fixed Endpoint Configuration215
Functional Description216
- Analog Transceiver217
- Serial Interface Engine (SIE)217
- Endpoint RAM (EP_RAM)217
- EP_RAM Access Control217
- DMA Engine and Bus Master Interface218
- Register Interface218
- Softconnect218
- Goodlink218
Operational Overview218
Pin Description219
Clocking and Power Management219
- Power Requirements219
- Clocks219
- Power Management Support220
- Remote Wake-Up221
Register Description221
- Clock Control Registers222
- USB Clock Control Register222
  - 0X5000 CFF4)222
- USB Clock Status Register223
  - Cff8)223
- Device Interrupt Registers223
- USB Interrupt Status Register223
  - 0X5000 C1C0)223
- USB Device Interrupt Status Register224
  - (Usbdevintst - 0X5000 C200)224
- USB Device Interrupt Enable Register (Usbdevinten - 0X5000 C204)225
- USB Device Interrupt Clear Register (Usbdevintclr - 0X5000 C208)225
- USB Device Interrupt Set Register226
  - 0X5000 C20C)226
- USB Device Interrupt Priority Register (Usbdevintpri - 0X5000 C22C)227
- Endpoint Interrupt Registers227
- USB Endpoint Interrupt Status Register (Usbepintst - 0X5000 C230)227
- USB Endpoint Interrupt Enable Register (Usbepinten - 0X5000 C234)228
- USB Endpoint Interrupt Clear Register (Usbepintclr - 0X5000 C238)229
- USB Endpoint Interrupt Set Register230
  - 0X5000 C23C)230
- USB Endpoint Interrupt Priority Register (Usbepintpri - 0X5000 C240)230
- Endpoint Realization Registers231
- EP RAM Requirements231
- USB Realize Endpoint Register232
  - 0X5000 C244)232
  - C248)233
  - 0X5000 C24C)233
- USB Transfer Registers234
- USB Receive Data Register (Usbrxdata - 0X5000 C218)234
- USB Receive Packet Length Register (Usbrxplen - 0X5000 C220)234
- USB Transmit Data Register (Usbtxdata - 0X5000 C21C)234
- USB Transmit Packet Length Register (Usbtxplen - 0X5000 C224)235
- USB Control Register235
  - C228)235
- SIE Command Code Registers236
- USB Command Code Register236
  - 0X5000 C210)236
- USB Command Data Register236
  - 0X5000 C214)236
- DMA Registers236
- USB DMA Request Status Register236
  - 0X5000 C250)236
- USB DMA Request Clear Register237
  - 0X5000 C254)237
- USB DMA Request Set Register238
  - 0X5000 C258)238
- USB UDCA Head Register238
  - C280)238
- USB EP DMA Status Register238
  - 0X5000 C284)238
- USB EP DMA Enable Register239
  - 0X5000 C288)239
- USB EP DMA Disable Register239
  - 0X5000 C28C)239
- USB DMA Interrupt Status Register239
  - 0X5000 C290)239
- USB DMA Interrupt Enable Register (Usbdmainten - 0X5000 C294)240
- USB End of Transfer Interrupt Status Register (Usbeotintst - 0X5000 C2A0)240
- USB End of Transfer Interrupt Clear Register (Usbeotintclr - 0X5000 C2A4)241
- USB End of Transfer Interrupt Set Register (Usbeotintset - 0X5000 C2A8)241
- USB New DD Request Interrupt Status Register (Usbnddrintst - 0X5000 C2AC)241
- USB New DD Request Interrupt Clear Register (Usbnddrintclr - 0X5000 C2B0)241
- USB New DD Request Interrupt Set Register (Usbnddrintset - 0X5000 C2B4)241
- USB System Error Interrupt Status Register (Usbsyserrintst - 0X5000 C2B8)242
- USB System Error Interrupt Clear Register (Usbsyserrintclr - 0X5000 C2BC)242
- USB System Error Interrupt Set Register (Usbsyserrintset - 0X5000 C2C0)242
Interrupt Handling242
- Slave Mode243
- DMA Mode243
Serial Interface Engine Command Description245
- Set Address246
  - Byte)246
- Configure Device246
- Set Mode (Command: 0Xf3, Data: Write 1 Byte)247
- Read Current Frame Number (Command: 0Xf5, Data: Read 1 or 2 Bytes)247
- Read Test Register (Command: 0Xfd, Data: Read 2 Bytes)248
- Set Device Status (Command: 0Xfe, Data: Write 1 Byte)248
- Get Device Status (Command: 0Xfe, Data: Read 1 Byte)249
- Get Error Code (Command: 0Xff, Data: Read 1 Byte)249
- Read Error Status (Command: 0Xfb, Data: Read 1 Byte)250
- Select Endpoint (Command: 0X00 - 0X1F, Data: Read 1 Byte (Optional))250
- Select Endpoint/Clear Interrupt (Command: 0X40 - 0X5F, Data: Read 1 Byte)251
- Set Endpoint Status (Command: 0X40 - 0X55, Data: Write 1 Byte (Optional))252
- Clear Buffer252
  - (Optional))252
- Validate Buffer253
  - None)253
USB Device Controller Initialization253
Slave Mode Operation254
- Interrupt Generation254
- Data Transfer for out Endpoints255
- Data Transfer for in Endpoints255
DMA Operation255
- Transfer Terminology256
- USB Device Communication Area256
- Triggering the DMA Engine257
- The DMA Descriptor257
- Next_Dd_Pointer258
- Dma_Mode258
- Next_Dd_Valid258
- Isochronous_Endpoint259
- Max_Packet_Size259
- Dma_Buffer_Length259
- Dma_Buffer_Start_Addr259
- Dd_Retired259
- Dd_Status259
- Packet_Valid260
- Ls_Byte_Extracted260
- Ms_Byte_Extracted260
- Present_Dma_Count260
- Message_Length_Position260
- Isochronous_Packetsize_Memory_Address260
- Non-Isochronous Endpoint Operation260
- Setting up DMA Transfers260
- Finding DMA Descriptor261
- Transferring the Data261
- Optimizing Descriptor Fetch261
- Ending the Packet Transfer261
- No_Packet DD262
- Isochronous Endpoint Operation262
- Setting up DMA Transfers262
- Finding the DMA Descriptor262
- Transferring the Data263
  - OUT Endpoints263
  - IN Endpoints263
- DMA Descriptor Completion263
- Isochronous out Endpoint Operation263
  - Example263
- Auto Length Transfer Extraction (ATLE) Mode Operation264
  - OUT Transfers in ATLE Mode265
  - IN Transfers in ATLE Mode266
- Setting up the DMA Transfer266
- Finding the DMA Descriptor266
- Transferring the Data266
  - OUT Endpoints266
  - IN Endpoints266
- Ending the Packet Transfer267
  - OUT Endpoints267
  - IN Endpoints267
Double Buffered Endpoint Operation267
- Bulk Endpoints267
- Isochronous Endpoints269
Chapter 12 : Lpc176X/5X USB Host Controller270
How to Read this Chapter270
Basic Configuration270
Introduction270
- Features271
- Architecture271
Interfaces271
- Pin Description272
- USB Host Usage Note272
- Software Interface272
- Register Map272
- USB Host Register Definitions273
Chapter 13: Lpc176X/5X USB OTG274
How to Read this Chapter274
Basic Configuration274
Introduction274
Features274
Architecture275
Modes of Operation275
Pin Configuration276
- Connecting the USB Port to an External OTG Transceiver276
- Connecting USB as a Host277
- Connecting USB as Device277
Register Description278
USB Interrupt Status Register278
- 0X5000 C1C0)278
- OTG Interrupt Status Register (Otgintst - 0X5000 C100)279
- OTG Interrupt Enable Register (Otginten - 0X5000 C104)279
- OTG Interrupt Set Register (Otgintset - 0X5000 C20C)280
- OTG Interrupt Clear Register (Otgintclr - 0X5000 C10C)280
- OTG Status and Control Register (Otgstctrl - 0X5000 C110)280
- OTG Timer Register (Otgtmr - 0X5000 C114)281
- OTG Clock Control Register (Otgclkctrl - 0X5000 CFF4)281
- OTG Clock Status Register (Otgclkst - 0X5000 CFF8)282
  - C300)282
  - C300)283
- I2C Status Register (I2C_STS - 0X5000 C304)283
  - C308)285
- I2C Clock High Register (I2C_CLKHI - 0X5000 C30C)286
- I2C Clock Low Register (I2C_CLKLO - 0X5000 C310)286
- Interrupt Handling286
HNP Support287
- B-Device: Peripheral to Host Switching288
  - Remove D+ Pull-Up290
  - Add D+ Pull-Up291
- A-Device: Host to Peripheral HNP Switching291
Clocking and Power Management295
- Device Clock Request Signals296
- Host Clock Request Signals297
- Power-Down Mode Support297
USB OTG Controller Initialization297
Chapter 14 : Lpc176X/5X UART0/2/3299
Basic Configuration299
Features299
Pin Description300
Register Description300
- Uartn Receiver Buffer Register (U0RBR - 0X4000 C000, U2RBR - 0X4009 8000, U3RBR - 0X4009 C000 When DLAB = 0)302
- Uartn Transmit Holding Register (U0THR - 0X4000 C000, U2THR - 0X4009 8000, U3THR - 0X4009 C000 When DLAB = 0)302
- Uartn Divisor Latch LSB Register302
  - When DLAB = 1)302
- Uartn Interrupt Enable Register (U0IER - 0X4000 C004, U2IER - 0X4009 8004, U3IER - 0X4009 C004 When DLAB = 0)303
- Uartn Interrupt Identification Register (U0IIR - 0X4000 C008, U2IIR - 0X4009 8008, U3IIR - 0X4009 C008)304
- Uartn FIFO Control Register (U0FCR - 0X4000 C008, U2FCR - 0X4009 8008, U3FCR - 0X4009 C008)306
- DMA Operation306
  - UART Receiver DMA306
  - UART Transmitter DMA307
- Uartn Line Control Register (U0LCR - 0X4000 C00C, U2LCR - 0X4009 800C, U3LCR - 0X4009 C00C)307
- Uartn Line Status Register (U0LSR - 0X4000 C014, U2LSR - 0X4009 8014, U3LSR - 0X4009 C014)307
- Uartn Scratch Pad Register (U0SCR - 0X4000 C01C, U2SCR - 0X4009 801C U3SCR - 0X4009 C01C)309
- Uartn Auto-Baud Control Register (U0ACR - 14.5 0X4000 C020, U2ACR - 0X4009 8020, U3ACR - 0X4009 C020)309
- Auto-Baud310
- Auto-Baud Modes311
- Uartn Irda Control Register (U0ICR - 0X4000 C024, U2ICR - 0X4009 8024, U3ICR - 0X4009 C024)312
- Uartn Fractional Divider Register (U0FDR - 0X4000 C028, U2FDR - 0X4009 8028, U3FDR - 0X4009 C028)313
- Baud Rate Calculation314
- Example 2: PCLK = 12 Mhz, BR = 115200316
- Uartn Transmit Enable Register (U0TER - 0X4000 C030, U2TER - 0X4009 8030, U3TER - 0X4009 C030)316
Architecture317
Chapter 15: Lpc176X/5X UART1319
Basic Configuration319
Features319
Pin Description320
Register Description321
- UART1 Receiver Buffer Register (U1RBR - 0X4001 0000, When DLAB = 0)322
- UART1 Transmitter Holding Register (U1THR - 0X4001 0000 When DLAB = 0)322
- UART1 Divisor Latch LSB and MSB Registers (U1DLL - 0X4001 0000 and U1DLM - 0X4001 0004, When DLAB = 1)322
- UART1 Interrupt Enable Register (U1IER - 0X4001 0004, When DLAB = 0)323
- UART1 Interrupt Identification Register (U1IIR - 0X4001 0008)324
- UART1 FIFO Control Register (U1FCR - 0X4001 0008)326
- DMA Operation326
  - UART Receiver DMA327
  - UART Transmitter DMA327
- UART1 Line Control Register (U1LCR - 0X4001 000C)327
- UART1 Modem Control Register (U1MCR - 0X4001 0010)327
- Auto-Flow Control328
- Auto-RTS328
- Auto-CTS329
- UART1 Line Status Register (U1LSR - 0X4001 0014)330
- UART1 Modem Status Register (U1MSR - 0X4001 0018)331
- UART1 Scratch Pad Register (U1SCR - 0X4001 001C)332
- UART1 Auto-Baud Control Register (U1ACR - 0X4001 0020)332
- Auto-Baud333
- Auto-Baud Modes334
- UART1 Fractional Divider Register (U1FDR - 0X4001 0028)335
- Baud Rate Calculation336
- Example 2: PCLK = 12 Mhz, BR = 115200338
- UART1 Transmit Enable Register (U1TER - 0X4001 0030)338
- UART1 RS485 Control Register (U1RS485CTRL - 0X4001 004C)339
- UART1 RS-485 Address Match Register (U1RS485ADRMATCH - 0X4001 0050)340
- UART1 RS-485 Delay Value Register (U1RS485DLY - 0X4001 0054)340
- RS-485/EIA-485 Modes of Operation340
  - RS-485/EIA-485 Normal Multidrop Mode340
  - (Nmm)340
  - Mode340
  - RS-485/EIA-485 Auto Direction Control341
  - RS485/EIA-485 Driver Delay Time341
  - RS485/EIA-485 Output Inversion342
Architecture342
Chapter 16: Lpc176X/5X CAN1/2344
Basic Configuration344
CAN Controllers344
Features344
- General CAN Features344
- CAN Controller Features345
- Acceptance Filter Features345
Pin Description345
CAN Controller Architecture345
- APB Interface Block (AIB)346
- Interface Management Logic (IML)346
- Transmit Buffers (TXB)346
- Receive Buffer (RXB)347
- Error Management Logic (EML)348
- Bit Timing Logic (BTL)348
- Bit Stream Processor (BSP)348
- CAN Controller Self-Tests348
  - Global Self Test349
  - Local Self Test349
Memory Map of the CAN Block350
CAN Controller Registers350
- CAN Mode Register (CAN1MOD - 0X4004 4000, CAN2MOD - 0X4004 8000)352
- CAN Command Register (CAN1CMR - 0X4004 X004, CAN2CMR - 0X4004 8004)354
- CAN Global Status Register (CAN1GSR - 0X4004 X008, CAN2GSR - 0X4004 8008)355
  - RX Error Counter357
  - TX Error Counter357
- CAN Interrupt and Capture Register (CAN1ICR - 0X4004 400C, CAN2ICR - 0X4004 800C)358
- CAN Interrupt Enable Register (CAN1IER - 0X4004 4010, CAN2IER - 0X4004 8010)361
- CAN Bus Timing Register (CAN1BTR -362
- CAN Error Warning Limit Register (CAN1EWL - 0X4004 4018, CAN2EWL - 0X4004 8018)363
- CAN Status Register (CAN1SR - 0X4004 401C, CAN2SR - 0X4004 801C)364
- CAN Receive Frame Status Register (CAN1RFS - 0X4004 4020, CAN2RFS - 0X4004 8020)365
- ID Index Field366
- CAN Receive Identifier Register (CAN1RID -366
- CAN Receive Data Register a (CAN1RDA -367
- CAN Receive Data Register B (CAN1RDB -367
- CAN Transmit Frame Information Register367
  - Automatic Transmit Priority Detection368
  - Tx DLC368
- CAN Transmit Identifier Register369
  - 0X4004 80[34/44/54])369
- CAN Transmit Data Register a (CAN1TDA[1/2/3] - 0X4004 40[38/48/58], CAN2TDA[1/2/3] - 0X4004 80[38/48/58])369
- CAN Transmit Data Register B370
  - 0X4004 80[3C/4C/5C])370
- CAN Sleep Clear Register (CANSLEEPCLR - 0X400F C110)370
- CAN Wake-Up Flags Register (CANWAKEFLAGS - 0X400F C114)371
CAN Controller Operation371
- Error Handling371
- Sleep Mode371
- Interrupts372
- Transmit Priority372
Centralized CAN Registers372
- Central Transmit Status Register (Cantxsr - 0X4004 0000)373
- Central Receive Status Register (Canrxsr - 0X4004 0004)373
- Central Miscellaneous Status Register (CANMSR - 0X4004 0008)374
Global Acceptance Filter374
Acceptance Filter Modes374
- Acceptance Filter off Mode375
- Acceptance Filter Bypass Mode375
- Acceptance Filter Operating Mode375
- Fullcan Mode375
Sections of the ID Look-Up Table RAM375
ID Look-Up Table RAM376
Acceptance Filter Registers378
- Acceptance Filter Mode Register (AFMR - 0X4003 C000)378
- Section Configuration Registers378
- Standard Frame Individual Start Address Register (Sff_Sa - 0X4003 C004)379
- Standard Frame Group Start Address Register (Sff_Grp_Sa - 0X4003 C008)379
- Extended Frame Start Address Register379
  - 0X4003 C00C)379
- Extended Frame Group Start Address Register (Eff_Grp_Sa - 0X4003 C010)380
- End of AF Tables Register (Endoftable - 0X4003 C014)380
- Status Registers380
- LUT Error Address Register (Luterrad - 0X4003 C018)381
- LUT Error Register (Luterr - 0X4003 C01C)381
- Global Fullcaninterrupt Enable Register381
  - 0X4003 C020)381
- Fullcan Interrupt and Capture Registers (FCANIC0 - 0X4003 C024 and FCANIC1 - 0X4003 C028)381
Configuration and Search Algorithm382
- Acceptance Filter Search Algorithm382
Fullcan Mode383
- Fullcan Message Layout385
- Fullcan Interrupts387
- Fullcan Message Interrupt Enable Bit387
- Message Lost Bit and CAN Channel Number388
- Setting the Interrupt Pending Bits389
- Clearing the Interrupt Pending Bits389
- Setting the Message Lost Bit of a Fullcan Message Object (Msglost 63 to 0)389
- Clearing the Message Lost Bit of a Fullcan Message Object (Msglost 63 to 0)389
- Set and Clear Mechanism of the Fullcan Interrupt389
- Scenario 1: Normal Case, no Message Lost . 389 16.16.3.2 Scenario 2: Message Lost390
  - By Semaphore Bits391
- Scenario 3.1: Message Gets Overwritten Indicated by Semaphore Bits and Message Lost391
  - By Message Lost392
- Scenario 4: Clearing Message Lost Bit393
Examples of Acceptance Filter Tables and ID Index Values394
- Example 1: Only One Section Is Used394
- Example 2: All Sections Are Used394
- Example 3: more than One but Not All Sections Are Used394
- Configuration Example 4395
- Configuration Example 5395
- Configuration Example 6396
- Configuration Example 7398
- Look-Up Table Programming Guidelines400
Chapter 17: Lpc176X/5X SPI402
Basic Configuration402
Features402
SPI Overview402
Pin Description403
SPI Data Transfers403
SPI Peripheral Details405
- General Information405
- Master Operation405
- Slave Operation406
- Exception Conditions406
Register Description407
- SPI Control Register407
- SPI Status Register409
- SPI Data Register (S0SPDR - 0X4002 0008)409
- SPI Clock Counter Register (S0SPCCR - 0X4002 000C)409
- SPI Test Control Register410
- SPI Test Status Register (SPTSR - 0X4002 0014)410
SPI Interrupt Register411
- 411411
Architecture412
Chapter 18: Lpc176X/5X SSP0/1413
Basic Configuration413
Features413
Description413
Pin Descriptions414
Bus Description414
- Texas Instruments Synchronous Serial Frame414
  - Format414
- SPI Frame Format415
  - Control415
- SPI Format with CPOL=0,CPHA=0416
- SPI Format with CPOL=0,CPHA=1417
- SPI Format with CPOL = 1,CPHA = 0417
- SPI Format with CPOL = 1,CPHA = 1419
  - Format419
- Setup and Hold Time Requirements on CS with Respect to SK in Microwire Mode421
Register Description422
- Sspn Control Register 0 (SSP0CR0 -422
- Sspn Control Register 1 (SSP0CR1 -423
- Sspn Data Register (SSP0DR - 0X4008 8008424
- Sspn Status Register (SSP0SR - 0X4008 800C, SSP1SR - 0X4003 000C)425
- Sspn Interrupt Mask Set/Clear Register (SSP0IMSC - 0X4008 8014, SSP1IMSC - 0X4003 0014)425
- Sspn Raw Interrupt Status Register (SSP0RIS -426
- Sspn Masked Interrupt Status Register (SSP0MIS - 0X4008 801C, SSP1MIS - 0X4003 001C)426
- Sspn Interrupt Clear Register (SSP0ICR -427
Chapter 19 : Lpc176X/5X I2C0/1/2429
Basic Configuration429
Features429
Applications430
Description430
- I 2 C FAST Mode Plus431
Pin Description431
I 2 C Operating Modes432
- Master Transmitter Mode432
- Master Receiver Mode433
- Slave Receiver Mode434
- Slave Transmitter Mode435
I 2 C Implementation and Operation435
- Input Filters and Output Stages435
- Address Registers, I2ADR0 to I2ADR3436
- Address Mask Registers, I2MASK0 to I2MASK3437
- Comparator437
- Shift Register, I2DAT437
- Arbitration and Synchronization Logic437
- Serial Clock Generator438
- Timing and Control439
- Control Register, I2CONSET and I2CONCLR 439 Status Decoder and Status Register439
Register Description440
- I C000;2, C000; C000;Ontrol Set Register (IC000;2,C000;ONSET: I C000;2, C000;0, IC000;2,C000;0C000;ONSET - 0X4001 C000;000; I C000;2, C000;1, IC000;2,C000;1C000;ONSET - 0X4005 C000;000; I C000;2, C000;C000;2,, IC000;2,C000;C000;2,C000;ONSET - 0X400A 0000)441
- Interrupt in Monitor Mode446
- Loss of Arbitration in Monitor Mode446
- C SCL Low Duty Cycle Register (I2SCLL: I I2C0SCLL: 0X4001 C014; I C1 - I2C1SCLL: 0X4005 C014; I C2 - I2C2SCLL: 0X400A 0014)448
  - Cycle449
Details of I C Operating Modes450
- Master Transmitter Mode451
- Master Receiver Mode453
- Slave Receiver Mode455
- Slave Transmitter Mode457
- Detailed State Tables458
- Miscellaneous States463
- I2STAT = 0Xf8463
- I2STAT = 0X00463
- Some Special Cases463
- Simultaneous Repeated START Conditions from Two Masters463
- Data Transfer after Loss of Arbitration464
- Forced Access to the I C-Bus464
- C-Bus Obstructed by a LOW Level on SCL or SDA464
- Bus Error464
- I 2 C State Service Routines466
- Initialization466
- I 2 C Interrupt Service466
- The State Service Routines466
- Adapting State Services to an Application466
Software Example467
- Initialization Routine467
- Start Master Transmit Function467
- Start Master Receive Function467
- C Interrupt Routine467
- Non Mode Specific States467
- State: 0X00467
- Master States468
- State: 0X08468
- State: 0X10468
- Master Transmitter States468
- State: 0X18468
- State: 0X20469
- State: 0X28469
- State: 0X30469
- State: 0X38469
- Master Receive States469
- State: 0X40469
- State: 0X48470
- State: 0X50470
- State: 0X58470
- Slave Receiver States470
- State: 0X60470
- State: 0X68471
- State: 0X70471
- State: 0X78471
- State: 0X80471
- State: 0X88472
- State: 0X90472
- State: 0X98472
- State: 0Xa0472
- Slave Transmitter States472
- State: 0Xa8472
- State: 0Xb0473
- State: 0Xb8473
- State: 0Xc0473
- State: 0Xc8473
Chapter 20 : Lpc176X/5X I2S474
Basic Configuration474
Features474
Description475
Pin Descriptions476
Register Description477
- Digital Audio Output Register (I2SDAO - 0X400A 8000)477
- Digital Audio Input Register477
  - 0X400A 8004)478
- Transmit FIFO Register (I2STXFIFO - 0X400A 8008)478
- Receive FIFO Register (I2SRXFIFO - 0X400A 800C)478
- Status Feedback Register (I2SSTATE - 0X400A 8010)479
- DMA Configuration Register 1 (I2SDMA1 - 0X400A 8014)479
- DMA Configuration Register 2 (I2SDMA2 - 0X400A 8018)480
- Interrupt Request Control Register (I2SIRQ - 0X400A 801C)480
- Transmit Clock Rate Register (I2STXRATE - 0X400A 8020)480
- Notes on Fractional Rate Generators481
  - Receive Clock Rate Register (I2SRXRATE - 0X400A 8024)481
- Transmit Clock Bit Rate Register (I2STXBITRATE - 0X400A 8028)482
- Receive Clock Bit Rate Register (I2SRXBITRATE - 0X400A 802C)482
- Transmit Mode Control Register (I2STXMODE - 0X400A 8030)482
- Receive Mode Control Register (I2SRXMODE - 0X400A 8034)483
S Transmit and Receive Interfaces484
S Operating Modes485
FIFO Controller489
Chapter 21: Lpc176X/5X Timer 0/1/2/3491
Basic Configuration491
Features491
Applications492
Description492
Pin Description492
- Multiple CAP and MAT Pins492
Register Description493
- Interrupt Register (T[0/1/2/3]IR - 0X4000 4000, 0X4000 8000, 0X4009 0000, 0X4009 4000)494
- Timer Control Register494
  - 0X4000 4004, 0X4000 8004, 0X4009 0004, 0X4009 4004)494
- Count Control Register (T[0/1/2/3]CTCR - 0X4000 4070, 0X4000 8070, 0X4009 0070, 0X4009 4070)495
- Timer Counter496
- Prescale Counter Register (T0PC - T3PC, 0X4000 4010, 0X4000 8010, 0X4009 0010, 0X4009 4010)496
- Match Registers (MR0 - MR3)497
- Match Control Register (T[0/1/2/3]MCR - 0X4000 4014, 0X4000 8014, 0X4009 0014, 0X4009 4014)497
- Capture Registers (CR0 - CR1)498
  - Capture Control Register (T[0/1/2/3]CCR - 0X4000 4028, 0X4000 8028, 0X4009 0028, 0X4009 4028)498
- External Match Register (T[0/1/2/3]EMR - 0X4000 403C, 0X4000 803C, 0X4009 003C, 0X4009 403C)498
- DMA Operation499
Example Timer Operation500
Architecture501
Chapter 22 : Lpc176X/5X Repetitive Interrupt Timer (RIT)502
Features502
Description502
Register Description502
- RI Compare Value Register (RICOMPVAL - 0X400B 0000)502
- RI Mask Register (RIMASK - 0X400B 0004)502
- RI Control Register (RICTRL - 0X400B 0008)503
  - 503503
RI Timer Operation503
Description505
Chapter 23 : Lpc176X/5X System Tick Timer505
Operation505
Basic Configuration505
Features505
Register Description506
- System Timer Control and Status Register (STCTRL - 0Xe000 E010)506
- System Timer Reload Value Register (STRELOAD - 0Xe000 E014)507
- System Timer Current Value Register (STCURR - 0Xe000 E018)507
- System Timer Calibration Value Register (STCALIB - 0Xe000 E01C)507
Example Timer Calculations509
- Example 1)509
- Example 2)509
- Example 3)509
- Example 4)509
Chapter 24: Lpc176X/5X Pulse Width Modulator (PWM)510
Basic Configuration510
Features510
Description511
Sample Waveform with Rules for Single and Double Edge Control513
- Rules for Single Edge Controlled PWM Outputs514
- Rules for Double Edge Controlled PWM Outputs514
Pin Description514
Register Description515
- PWM Interrupt Register (PWM1IR - 0X4001 8000)516
- PWM Timer Control Register (PWM1TCR 0X4001 8004)517
- PWM Count Control Register (PWM1CTCR - 0X4001 8070)517
- PWM Match Control Register (PWM1MCR - 0X4001 8014)518
- PWM Capture Control Register (PWM1CCR - 0X4001 8028)519
- PWM Control Register (PWM1PCR - 0X4001 804C)520
- PWM Latch Enable Register (PWM1LER - 0X4001 8050)521
Chapter 25: Lpc176X/5X Motor Control PWM523
Introduction523
Description523
Pin Description523
Block Diagram524
Configuring Other Modules for MCPWM Use525
General Operation525
Register Description526
- MCPWM Control Register527
- MCPWM Control Read Address (MCCON - 0X400B 8000)527
- MCPWM Control Set Address528
  - 0X400B 8004)528
  - 0X400B 8008)529
- MCPWM Capture Control Register529
- MCPWM Capture Control Read Address (MCCAPCON - 0X400B 800C)529
- MCPWM Capture Control Set Address (MCCAPCON_SET - 0X400B 8010)530
- MCPWM Capture Control Clear Address (MCCAPCON_CLR - 0X400B 8014)530
- MCPWM Interrupt Registers530
- MCPWM Interrupt Enable Read Address530
- MCPWM Interrupt Enable Set Address531
- MCPWM Interrupt Enable Clear Address (MCINTEN_CLR - 0X400B 8058)531
- MCPWM Interrupt Flags Read Address (MCINTF - 0X400B 8068)531
- MCPWM Interrupt Flags Set Address (MCINTF_SET - 0X400B 806C)531
- MCPWM Interrupt Flags Clear Address (MCINTF_CLR - 0X400B 8070)531
- MCPWM Count Control Register532
- MCPWM Count Control Read Address (MCCNTCON - 0X400B 805C)532
- MCPWM Count Control Set Address (MCCNTCON_SET - 0X400B 8060)533
- MCPWM Count Control Clear Address (MCCNTCON_CLR - 0X400B 8064)533
- MCPWM Timer/Counter 0-2 Registers533
- MCPWM Limit 0-2 Registers534
- Match and Limit Write and Operating Registers534
- MCPWM Match 0-2 Registers535
- Match Register in Edge-Aligned Mode535
- Match Register in Center-Aligned Mode535
- And 100% Duty Cycle535
- MCPWM Dead-Time Register (MCDT - 0X400B 803C)536
- MCPWM Commutation Pattern Register (MCCP - 0X400B 8040)536
- MCPWM Capture Registers537
- MCPWM Capture Read Addresses537
  - 0X400B 8074)537
PWM Operation538
- Pulse-Width Modulation538
- Shadow Registers and Simultaneous Updates 540 Fast Abort (ABORT)540
- Capture Events540
- External Event Counting (Counter Mode)541
- Three-Phase DC Mode541
- Three Phase AC Mode542
- Interrupts543
Chapter 26: Lpc176X/5X Quadrature Encoder Interface (QEI)544
Basic Configuration544
Features544
Introduction544
Functional Description546
- Input Signals546
- Quadrature Input Signals546
- Digital Input Filtering547
- Position Capture547
- Velocity Capture547
- Velocity Compare548
Pin Description549
Register Description550
- Register Summary550
- Control Registers551
- C000)551
- C008)551
- QEI Status Register (QEISTAT - 0X400B C004)551
- Position, Index and Timer Registers552
  - C00C)552
- QEI Maximum Position Register (QEIMAXPOS - 0X400B C010)552
- QEI Position Compare Register 0 (CMPOS0 - 0X400B C014)552
- QEI Position Compare Register 1 (CMPOS1 - 0X400B C018)552
- QEI Position Compare Register 2 (CMPOS2 - 0X400B C01C)553
- QEI Index Count Register (INXCNT - 0X400B C020)553
  - C024)553
- QEI Timer Reload Register (QEILOAD - 0X400B C028)553
- QEI Timer Register (QEITIME - 0X400B C02C)553
  - C030)554
  - C034)554
  - 0X400B C038)554
  - C03C)554
- Interrupt Registers555
- QEI Interrupt Status Register (QEIINTSTAT)555
- QEI Interrupt Set Register (QEISET - 0X400B CFEC)555
- QEI Interrupt Clear Register (QEICLR - 0X400B CFE8)556
- QEI Interrupt Enable Register (QEIIE - 0X400B CFE4)556
- QEI Interrupt Enable Set Register (QEIIES - 0X400B CFDC)557
- QEI Interrupt Enable Clear Register (QEIIEC - 0X400B CFD8)558
Basic Configuration559
Chapter 27 : Lpc176X/5X Real-Time Clock (RTC) and Backup Registers559
Features559
Description559
Architecture560
Pin Description561
Register Description561
- RTC Interrupts563
- Miscellaneous Register Group563
- Interrupt Location Register (ILR - 0X4002 4000)563
- Clock Control Register (CCR - 0X4002 4008)563
- Counter Increment Interrupt Register (CIIR - 0X4002 400C)564
- Alarm Mask Register (AMR - 0X4002 4010)564
  - 0X4002 405C)565
  - 0X4002 4058)565
- Consolidated Time Registers566
- Consolidated Time Register 0 (CTIME0 - 0X4002 4014)566
- Consolidated Time Register 1 (CTIME1 - 0X4002 4018)566
- Consolidated Time Register 2 (CTIME2 - 0X4002 401C)566
- Time Counter Group567
- Leap Year Calculation567
- Calibration Register (CALIBRATION - Address 0X4002 4040)567
- Calibration Procedure568
  - Backward Calibration568
  - Forward Calibration568
- General Purpose Registers569
- General Purpose Registers 0 to 4 (GPREG0 to GPREG4 - Addresses 0X4002 4044 to 0X4002 4054)569
- Alarm Register Group569
RTC Usage Notes569
Chapter 28: Lpc176X/5X Watchdog Timer (WDT)570
Features570
Applications570
Description571
Register Description571
- Watchdog Mode Register (WDMOD - 0X4000 0000)572
- Watchdog Timer Constant Register (WDTC - 0X4000 0004)573
- Watchdog Feed Register (WDFEED - 0X4000 0008)573
- Watchdog Timer Value Register (WDTV - 0X4000 000C)573
- Watchdog Timer Clock Source Selection Register573
Block Diagram574
Chapter 29 : Lpc176X/5X Analog-To-Digital Converter (ADC)575
Basic Configuration575
Features575
Description575
Pin Description576
Register Description577
- A/D Control Register (AD0CR - 0X4003 4000)578
- A/D Global Data Register (AD0GDR - 0X4003 4004)579
- A/D Interrupt Enable Register (AD0INTEN - 0X4003 400C)579
- A/D Data Registers (AD0DR0 to AD0DR7 - 0X4003 4010 to 0X4003 402C)580
- A/D Status Register (ADSTAT - 0X4003 4030)581
- A/D Trim Register (ADTRIM - 0X4003 4034)581
Operation582
- Hardware-Triggered Conversion582
- Interrupts582
- Accuracy Vs. Digital Receiver582
- DMA Control582
Chapter 30 : Lpc176X/5X Digital-To-Analog Converter (DAC)583
Pin Description583
Basic Configuration583
Features583
Register Description584
- C000)584
- D/A Converter Control Register (DACCTRL - 0X4008 C004)584
- D/A Converter Counter Value Register585
Operation585
- DMA Counter585
- Double Buffering585
Chapter 31 : Lpc176X/5X General Purpose DMA (GPDMA)587
Basic Configuration587
Introduction587
Features587
Functional Description588
- DMA Controller Functional Description588
- AHB Slave Interface588
- Control Logic and Register Bank589
- DMA Request and Response Interface589
- Channel Logic and Channel Register Bank589
- Interrupt Request589
- AHB Master Interface589
- Bus and Transfer Widths589
- Endian Behavior589
- Error Conditions591
- Channel Hardware592
- DMA Request Priority592
- Interrupt Generation592
- DMA System Connections592
- DMA Request Signals592
- DMA Response Signals592
- DMA Request Connections593
Register Description594
- DMA Interrupt Status Register (Dmacintstat - 0X5000 4000)596
- DMA Interrupt Terminal Count Request Status Register (Dmacinttcstat - 0X5000 4004)596
- DMA Interrupt Terminal Count Request Clear Register (Dmacinttcclear - 0X5000 4008)596
- DMA Interrupt Error Status Register (Dmacinterrstat - 0X5000 400C)596
- DMA Interrupt Error Clear Register (Dmacinterrclr - 0X5000 4010)597
- DMA Raw Interrupt Terminal Count Status Register (Dmacrawinttcstat - 0X5000 4014)597
- DMA Raw Error Interrupt Status Register (Dmacrawinterrstat - 0X5000 4018)597
- DMA Enabled Channel Register (Dmacenbldchns - 0X5000 401C)598
- DMA Software Burst Request Register (Dmacsoftbreq - 0X5000 4020)598
- DMA Software Single Request Register (Dmacsoftsreq - 0X5000 4024)599
- DMA Software Last Burst Request Register (Dmacsoftlbreq - 0X5000 4028)599
- DMA Software Last Single Request Register (Dmacsoftlsreq - 0X5000 402C)599
- DMA Configuration Register (Dmacconfig - 0X5000 4030)600
- DMA Synchronization Register (Dmacsync - 0X5000 4034)600
- DMA Request Select Register (Dmareqsel - 0X400F C1C4)601
- DMA Channel Registers601
- DMA Channel Source Address Registers (Dmaccxsrcaddr - 0X5000 41X0)602
- DMA Channel Destination Address Registers (Dmaccxdestaddr - 0X5000 41X4)602
- DMA Channel Linked List Item Registers (Dmaccxlli - 0X5000 41X8)602
- DMA Channel Control Registers (Dmaccxcontrol - 0X5000 41Xc)603
- Protection and Access Information603
- DMA Channel Configuration Registers (Dmaccxconfig - 0X5000 41X0)605
- Lock Control607
- Transfer Type607
Using the DMA Controller608
- Programming the DMA Controller608
- Enabling the DMA Controller608
- Disabling the DMA Controller608
- Enabling a DMA Channel608
- Disabling a DMA Channel608
  - Disabling a DMA Channel and Losing Data in the FIFO608
  - Disabling the DMA Channel Without Losing Data in the FIFO608
- Setting up a New DMA Transfer608
- Halting a DMA Channel609
- Programming a DMA Channel609
- Flow Control609
- Peripheral-To-Memory or Memory-To-Peripheral DMA Flow610
- Peripheral-To-Peripheral DMA Flow610
- Memory-To-Memory DMA Flow611
- Interrupt Requests611
- Hardware Interrupt Sequence Flow612
- Address Generation612
- Word-Aligned Transfers Across a Boundary . 612 Scatter/Gather612
- Linked List Items613
- Programming the DMA Controller for Scatter/Gather DMA613
- Example of Scatter/Gather DMA613
Chapter 32: Lpc176X/5X Flash Memory Interface and Programming616
Introduction616
Features616
Description616
- Memory Map after any Reset617
- Criterion for Valid User Code617
- Communication Protocol618
- ISP Command Format618
- ISP Response Format618
- ISP Data Format618
- ISP Flow Control619
- ISP Command Abort619
- Interrupts During IAP619
- RAM Used by ISP Command Handler619
- RAM Used by IAP Command Handler619
Boot Process Flowchart620
Sector Numbers621
Code Read Protection (CRP)622
ISP Commands624
- Unlock <Unlock Code624
- Set Baud Rate <Baud Rate> <Stop Bit625
- Echo <Setting625
- Write to RAM <Start Address> <Number of Bytes625
- Read Memory <Address> <No. of Bytes626
- Prepare Sector(S) for Write Operation <Start Sector Number> <End Sector Number627
- Copy RAM to Flash <Flash Address> <RAM Address> <No of Bytes627
- Go <Address> <Mode628
- Erase Sector(S) <Start Sector Number> <End Sector Number628
- Blank Check Sector(S) <Sector Number> <End Sector Number629
- Read Part Identification Number629
- Read Boot Code Version Number630
- Read Device Serial Number630
- Compare <Address1> <Address2> <No of Bytes630
- ISP Return Codes631
IAP Commands632
- Prepare Sector(S) for Write Operation634
- Copy RAM to Flash635
- Erase Sector(S)635
- Blank Check Sector(S)636
- Read Part Identification Number636
- Read Boot Code Version Number636
- Read Device Serial Number637
- Compare <Address1> <Address2> <No of Bytes637
- Re-Invoke ISP637
- IAP Status Codes638
JTAG Flash Programming Interface638
Flash Signature Generation639
- Register Description for Signature Generation639
  - Registers640
- Signature Generation Result Registers640
  - 0X0X4008 4FE0)641
  - 0X0X4008 4FE8)641
- Algorithm and Procedure for Signature Generation642
  - Signature Generation642
  - Content Verification642
Chapter 33 : Lpc176X/5X JTAG, Serial Wire Debug (SWD), and Trace643
Features643
Introduction643
Description643
Pin Description643
Debug Notes644
JTAG TAP Identification645
Debug Memory Re-Mapping645
- Memory Mapping Control Register (MEMMAP - 0X400F C040)645
Chapter 34 : Appendix: Cortex-M3 User Guide646
ARM Cortex-M3 User Guide: Introduction646
- About the Processor and Core Peripherals646
- System Level Interface647
- Integrated Configurable Debug647
- Cortex-M3 Processor Features and Benefits Summary648
- Cortex-M3 Core Peripherals648
ARM Cortex-M3 User Guide: Instruction Set649
- Instruction Set Summary649
  - Note649
- Intrinsic Functions652
- About the Instruction Descriptions652
- Operands653
- Restrictions When Using PC or SP653
- Flexible Second Operand653
- Constant653
- Register with Optional Shift654
- Shift Operations654
- Asr655
  - Note655
- Lsr655
- Lsl656
  - Note656
- Ror656
- Rrx657
- Address Alignment657
- PC-Relative Expressions658
  - Note658
- Conditional Execution658
- The Condition Flags659
- Condition Code Suffixes659
- Instruction Width Selection660
- Example: Instruction Width Selection660
- Memory Access Instructions661
- Adr662
- Syntax662
- Operation662
- Restrictions662
- Condition Flags662
- Examples662
- LDR and STR, Immediate Offset663
- Syntax663
- Operation663
- Restrictions664
- Condition Flags664
- Examples665
- LDR and STR, Register Offset666
- Syntax666
- Operation666
- Restrictions666
- Condition Flags667
- Examples667
- LDR and STR, Unprivileged668
- Syntax668
- Operation668
- Restrictions668
- Condition Flags668
- Examples669
- LDR, PC-Relative670
- Syntax670
- Operation670
- Restrictions670
- Condition Flags671
- Examples671
- LDM and STM672
- Syntax672
- Operation672
- Restrictions673
- Condition Flags673
- Examples673
- Incorrect Examples673
- PUSH and POP674
- Syntax674
- Operation674
- Restrictions674
- Condition Flags674
- Examples674
- LDREX and STREX675
- Syntax675
- Operation675
- Restrictions675
- Condition Flags676
- Examples676
- Clrex677
- Syntax677
- Operation677
- Condition Flags677
- Examples677
- General Data Processing Instructions678
- ADD, ADC, SUB, SBC, and RSB679
- Syntax679
- Operation679
- Restrictions679
  - Note680
- Condition Flags680
- Examples680
- Multiword Arithmetic Examples680
- AND, ORR, EOR, BIC, and ORN682
- Syntax682
- Operation682
- Restrictions682
- Condition Flags682
- Examples682
- ASR, LSL, LSR, ROR, and RRX684
- Syntax684
- Operation684
- Restrictions684
- Condition Flags685
- Examples685
- Clz686
- Syntax686
- Operation686
- Restrictions686
- Condition Flags686
- Examples686
- CMP and CMN687
- Syntax687
- Operation687
- Restrictions687
- Condition Flags687
- Examples687
- MOV and MVN688
- Syntax688
- Operation688
- Restrictions689
- Condition Flags689
- Example689
- Movt690
- Syntax690
- Operation690
- Restrictions690
- Condition Flags690
- Examples690
- REV, REV16, REVSH, and RBIT691
- Syntax691
- Operation691
- Restrictions691
- Condition Flags691
- Examples691
- TST and TEQ692
- Syntax692
- Operation692
- Restrictions692
- Condition Flags692
- Examples692
- Multiply and Divide Instructions693
- MUL, MLA, and MLS694
- Syntax694
- Operation694
- Restrictions694
- Condition Flags694
- Examples695
- UMULL, UMLAL, SMULL, and SMLAL696
- Syntax696
- Operation696
- Restrictions696
- Condition Flags696
- Examples697
- SDIV and UDIV698
- Syntax698
- Operation698
- Restrictions698
- Condition Flags698
- Examples698
- Saturating Instructions699
- SSAT and USAT699
- Syntax699
- Operation699
- Restrictions700
- Condition Flags700
- Examples700
- Bitfield Instructions701
- BFC and BFI702
- Syntax702
- Operation702
- Restrictions702
- Condition Flags702
- Examples702
- SBFX and UBFX703
- Syntax703
- Operation703
- Restrictions703
- Condition Flags703
- Examples703
- SXT and UXT704
- Syntax704
- Operation704
- Restrictions704
- Condition Flags704
- Examples705
- Branch and Control Instructions706
- B, BL, BX, and BLX707
- Syntax707
- Operation707
- Restrictions708
- Condition Flags708
- Examples708
- CBZ and CBNZ709
- Syntax709
- Operation709
- Restrictions709
- Condition Flags709
- Examples709
- Syntax710
- Operation710
- Restrictions710
- Condition Flags711
- Example711
- TBB and TBH713
- Syntax713
- Operation713
- Restrictions713
- Condition Flags713
- Examples713
- Miscellaneous Instructions715
- Bkpt716
- Syntax716
- Operation716
- Condition Flags716
- Examples716
- Cps717
- Syntax717
- Operation717
- Restrictions717
- Condition Flags717
- Examples717
- Dmb718
- Syntax718
- Operation718
- Condition Flags718
- Examples718
- Dsb719
- Syntax719
- Operation719
- Condition Flags719
- Examples719
- Isb720
- Syntax720
- Operation720
- Condition Flags720
- Examples720
- Mrs721
- Syntax721
- Operation721
- Restrictions721
- Condition Flags721
- Examples721
- Msr722
- Syntax722
- Operation722
  - Note722
- Restrictions722
- Condition Flags722
- Examples722
- Nop723
- Syntax723
- Operation723
- Condition Flags723
- Examples723
- Sev724
- Syntax724
- Operation724
- Condition Flags724
- Examples724
- Svc725
- Syntax725
- Operation725
- Condition Flags725
- Examples725
- Wfe726
- Syntax726
- Operation726
- Condition Flags726
- Examples726
- Wfi727
- Syntax727
- Operation727
- Condition Flags727
- Examples727
ARM Cortex-M3 User Guide: Processor728
- Programmers Model728
- Processor Mode and Privilege Levels for Software Execution728
- Stacks728
- Core Registers729
- General-Purpose Registers730
- Stack Pointer730
- Link Register730
- Program Counter730
- Program Status Register730
- Exception Mask Registers734
- CONTROL Register735
- Exceptions and Interrupts735
- Data Types736
- The Cortex Microcontroller Software Interface Standard736
- Memory Model737
- Memory Regions, Types and Attributes737
- Memory System Ordering of Memory Accesses738
- Behavior of Memory Accesses739
- Software Ordering of Memory Accesses739
- Bit-Banding740
- Directly Accessing an Alias Region742
- Directly Accessing a Bit-Band Region742
- Memory Endianness743
- Little-Endian Format743
- Synchronization Primitives743
- Programming Hints for the Synchronization Primitives744
- Exception Model746
- Exception States746
- Exception Types746
- Exception Handlers748
- Vector Table749
- Exception Priorities749
- Interrupt Priority Grouping750
- Exception Entry and Return750
- Exception Entry751
- Exception Return752
- Fault Handling754
- Fault Types754
- Fault Escalation and Hard Faults755
- Fault Status Registers and Fault Address Registers755
- Lockup756
- Power Management757
- Entering Sleep Mode757
- Wait for Interrupt757
- Wait for Event757
- Sleep-On-Exit758
- Wakeup from Sleep Mode758
- Wakeup from WFI or Sleep-On-Exit758
- Wakeup from WFE758
- The Wake-Up Interrupt Controller758
- Power Management Programming Hints759
ARM Cortex-M3 User Guide: Peripherals760
- About the Cortex-M3 Peripherals760
- Nested Vectored Interrupt Controller761
- The CMSIS Mapping of the Cortex-M3 NVIC Registers761
- Interrupt Set-Enable Registers762
- Interrupt Clear-Enable Registers762
- Interrupt Set-Pending Registers763
- Interrupt Clear-Pending Registers763
- Interrupt Active Bit Registers764
- Interrupt Priority Registers764
- Software Trigger Interrupt Register765
- Level-Sensitive and Pulse Interrupts765
- Hardware and Software Control of Interrupts766
- NVIC Design Hints and Tips766
- NVIC Programming Hints767
- System Control Block768
- The CMSIS Mapping of the Cortex-M3 SCB Registers768
- Auxiliary Control Register768
- About IT Folding769
- CPUID Base Register769
- Interrupt Control and State Register769
- Vector Table Offset Register771
- Application Interrupt and Reset Control Register772
- Binary Point773
- System Control Register773
- Configuration and Control Register774
- System Handler Priority Registers775
- System Handler Priority Register 1776
- System Handler Priority Register 2776
- System Handler Priority Register 3776
- System Handler Control and State Register776
  - Caution777
- Configurable Fault Status Register778
- Memory Management Fault Status Register778
- Bus Fault Status Register779
- Usage Fault Status Register780
- Hard Fault Status Register782
  - Register782
- Bus Fault Address Register782
- System Control Block Design Hints and Tips783
- System Timer, Systick784
- Systick Control and Status Register784
- Systick Reload Value Register785
- Calculating the RELOAD Value785
- Systick Current Value Register785
- Systick Calibration Value Register785
- Systick Design Hints and Tips786
- Memory Protection Unit787
- MPU Type Register788
- MPU Control Register789
- MPU Region Number Register790
- MPU Region Base Address Register790
- The ADDR Field791
- MPU Region Attribute and Size Register791
- SIZE Field Values792
- MPU Access Permission Attributes793
- MPU Mismatch794
- Updating an MPU Region794
  - Words794
  - Writes795
- Subregions796
- MPU Design Hints and Tips797
- MPU Configuration for a Microcontroller797
ARM Cortex-M3 User Guide: Glossary798
Abbreviations802
Legal Information803
- Definitions803
- Disclaimers803
- Trademarks803
Tables804
Figures816
Contents818

NXP Semiconductors LPC1768 User Manual

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Brand	NXP Semiconductors
Model	LPC1768
Category	Microcontrollers
Language	English