NXP Semiconductors KL25 Series - Freescale Semiconductor, Inc

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H 8 7 6 5 4 3 2 1 0 L

UART_D – Tx Buffer

(Write-Only)

Internal Bus

Stop

11-BIT Transmit Shift Register

Start

SHIFT DIRECTION

lsb

1  Baud

Rate Clock

Parity

Generation

Transmit Control

Shift Enable

Preamble (All 1s)

Break (All 0s)

UART Controls TxD

TxD Direction

TO TxD

Pin Logic

Loop

Control

To Receive

Data In

To TxD Pin

Tx Interrupt

Request

LOOPS

RSRC

TIE

TDRE

TCIE

SBK

TXDIR

Load From UARTx_D

TXINV

BRK13

Figure 39-1. UART transmitter block diagram

The following figure shows the receiver portion of the UART.

Chapter 39 Universal Asynchronous Receiver/Transmitter (UART0)

KL25 Sub-Family Reference Manual, Rev. 3, September 2012

Freescale Semiconductor, Inc. 723

Main Page

Default Chapter3
- Table of Contents3
Chapter 1 About this Document33
- Overview33
  - Purpose33
  - Audience33
- Conventions33
Chapter 2 Introduction35
- Overview35
- Kinetis L Series35
- KL25 Sub-Family Introduction38
- Module Functional Categories39
- Orderable Part Numbers44
Chapter 3 Chip Configuration45
- Introduction45
- Module to Module Interconnects45
  - KL25 Sub-Family Reference Manual, Rev. 3, September46
  - Analog Reference Options48
- Core Modules48
- System Modules56
- Clock Modules70
  - MCG Configuration70
  - OSC Configuration71
- Memories and Memory Interfaces72
- Analog77
- Timers84
- Communication Interfaces91
- Human-Machine Interfaces (HMI)99
- Introduction105
- System Memory Map105
- Flash Memory Map106
Chapter 4 Alternate Non-Volatile IRC User Trim Description107
- SRAM Memory Map107
- Bit Manipulation Engine107
- Peripheral Bridge (AIPS-Lite) Memory Map108
- Private Peripheral Bus (PPB) Memory Map112
Chapter 5115
- Introduction115
- Programming Model115
- High-Level Device Clocking Diagram115
- Clock Definitions116
  - Device Clock Summary117
- Internal Clocking Requirements119
  - Clock Divider Values after Reset119
  - VLPR Mode Clocking120
- Clock Gating121
- Module Clocks121
Chapter 6 Reset and Boot127
- Introduction127
- Reset127
- Boot134
Chapter 7 Power Management137
- Introduction137
- Clocking Modes137
- Power Modes141
- Entering and Exiting Power Modes143
- Module Operation in Low Power Modes143
Chapter 8 Security149
- Introduction149
- Flash Security149
- Security Interactions with Other Modules149
  - Security Interactions with Debug150
Chapter 9 Debug151
- Introduction151
- Debug Port Pin Descriptions151
- SWD Status and Control Registers152
Chapter 10160
- Port Control and Interrupt Module Features160
- Clock Gating161
- KL25 Pinouts164
- Module Signal Description Tables168
  - Core Modules169
  - Modes of Operation176
- External Signal Description176
- KL25 Sub-Family Reference Manual, Rev. 3, September176
- Detailed Signal Description177
- Memory Map and Register Definition177
- Functional Description187
Chapter 12 System Integration Module (SIM)191
- Introduction191
  - Features191
- Memory Map and Register Definition191
- Functional Description216
Chapter 13 System Mode Controller (SMC)217
- Introduction217
- Modes of Operation217
- Memory Map and Register Descriptions219
- Functional Description224
Chapter 14 Power Management Controller (PMC)237
- Introduction237
- Features237
- Low-Voltage Detect (LVD) System237
- I/O Retention239
- Memory Map and Register Descriptions239
Chapter 15 Low-Leakage Wakeup Unit (LLWU)245
- Introduction245
- LLWU Signal Descriptions248
- Memory Map/Register Definition248
- Functional Description262
Chapter 16 Reset Control Module (RCM)265
- Introduction265
- Reset Memory Map and Register Descriptions265
Chapter 17 Bit Manipulation Engine (BME)271
- Introduction271
- External Signal Description273
- Memory Map and Register Definition274
- Functional Description274
- Application Information288
Chapter 18 Miscellaneous Control Module (MCM)291
- Introduction291
  - Features291
- Memory Map/Register Descriptions291
Chapter 19 Micro Trace Buffer (MTB)299
- Introduction299
- External Signal Description303
- Memory Map and Register Definition304
Chapter 20 Crossbar Switch Lite (AXBS-Lite)331
- Introduction331
  - Features331
- Memory Map / Register Definition331
- Functional Description332
  - General Operation332
  - Arbitration333
- Initialization/Application Information334
Chapter 21 Peripheral Bridge (AIPS-Lite)335
- Introduction335
  - Features335
  - General Operation336
- Functional Description336
  - Access Support336
Chapter 22 Direct Memory Access Multiplexer (DMAMUX)337
- Introduction337
- External Signal Description339
- Memory Map/Register Definition339
  - Channel Configuration Register (Dmamuxx_Chcfgn)339
- Functional Description340
- Initialization/Application Information344
  - Reset344
  - Enabling and Configuring Sources344
Chapter 23 DMA Controller Module349
- Introduction349
  - Overview349
  - Features350
- DMA Transfer Overview351
- Memory Map and Registers352
- Functional Description361
Chapter 24372
- MCG Control 1 Register (MCG_C1)372
- MCG Control 2 Register (MCG_C2)373
- MCG Control 3 Register (MCG_C3)374
- Freescale Semiconductor, Inc375
- MCG Control 5 Register (MCG_C5)376
- MCG Control 6 Register (MCG_C6)377
- MCG Status Register (MCG_S)378
- Freescale Semiconductor, Inc379
- MCG Status and Control Register (MCG_SC)380
- MCG Auto Trim Compare Value High Register (MCG_ATCVH)381
- MCG Control 7 Register (MCG_C7)382
- MCG Control 9 Register (MCG_C9)383
  - Functional Description384
  - Freescale Semiconductor, Inc385
  - Freescale Semiconductor, Inc386
  - Freescale Semiconductor, Inc387
- MCG Internal Reference Clocks388
- Low Power Bit Usage388
- External Reference Clock389
- MCG Fixed Frequency Clock389
- KL25 Sub-Family Reference Manual, Rev. 3, September389
- MCG PLL Clock390
- MCG Auto TRIM (ATM)390
- Initialization / Application Information391
  - MCG Module Initialization Sequence391
  - Freescale Semiconductor, Inc392
  - Using a 32.768 Khz Reference393
  - Freescale Semiconductor, Inc393
  - MCG Mode Switching394
Chapter 25 Oscillator (OSC)405
- Introduction405
- Features and Modes405
- Block Diagram406
- OSC Signal Descriptions406
- External Crystal / Resonator Connections407
- External Clock Connections408
- Memory Map/Register Definitions409
  - OSC Memory Map/Register Definition409
- Functional Description410
- Reset414
- Low Power Modes Operation414
- Interrupts414
Chapter 42420
- Features420
Chapter 26 Glossary421
- External Signal Description422
- Flash Configuration Field Description423
- Register Descriptions424
- Flash Protection433
- Flash Operation in Low-Power Modes434
- Flash Reads and Ignored Writes435
- Margin Read Commands440
- Flash Command Description441
- Security454
Chapter 28 ADC Signal Descriptions459
- Voltage Reference Select460
- Analog Channel Inputs (Adx)461
- ADC Status and Control Registers 1 (Adcx_Sc1N)462
  - Freescale Semiconductor, Inc463
  - Freescale Semiconductor, Inc464
- ADC Configuration Register 1 (Adcx_Cfg1)465
- Freescale Semiconductor, Inc466
- ADC Configuration Register 2 (Adcx_Cfg2)467
- ADC Data Result Register (Adcx_Rn)468
- Compare Value Registers (Adcx_Cvn)469
- Status and Control Register 2 (Adcx_Sc2)470
- Freescale Semiconductor, Inc471
- Status and Control Register 3 (Adcx_Sc3)472
- Freescale Semiconductor, Inc473
- ADC Offset Correction Register (Adcx_Ofs)474
- ADC Minus-Side Gain Register (Adcx_Mg)475
- ADC Plus-Side General Calibration Value Register (Adcx_Clps)476
- KL25 Sub-Family Reference Manual, Rev. 3, September477
- ADC Plus-Side General Calibration Value Register (Adcx_Clp1)478
- ADC Minus-Side General Calibration Value Register (Adcx_Clmd)479
- ADC Minus-Side General Calibration Value Register (Adcx_Clm4)480
- ADC Minus-Side General Calibration Value Register (Adcx_Clm2)481
- ADC Minus-Side General Calibration Value Register (Adcx_Clm0)482
- Clock Select and Divide Control483
- Voltage Reference Selection484
- Conversion Control485
  - Freescale Semiconductor, Inc486
  - Freescale Semiconductor, Inc487
  - Freescale Semiconductor, Inc488
  - Freescale Semiconductor, Inc489
  - Freescale Semiconductor, Inc490
  - Freescale Semiconductor, Inc491
  - Freescale Semiconductor, Inc492
- Automatic Compare Function493
- Calibration Function494
- Freescale Semiconductor, Inc495
- User-Defined Offset Function496
- Temperature Sensor497
- MCU Normal Stop Mode Operation498
- MCU Low-Power Stop Mode Operation499
  - KL25 Sub-Family Reference Manual, Rev. 3, September500
  - Application Information501
  - Freescale Semiconductor, Inc502
- Sources of Error503
  - Freescale Semiconductor, Inc504
  - Freescale Semiconductor, Inc505
  - Freescale Semiconductor, Inc506
  - Freescale Semiconductor, Inc507
  - Freescale Semiconductor, Inc508
  - Introduction509
Chapter 29510
- Bit DAC Key Features510
- ANMUX Key Features511
- CMP Block Diagram512
- CMP Interrupts533
- CMP Asyncrhonous DMA Support534
- KL25 Sub-Family Reference Manual, Rev. 3, September535
- DAC Interrupts536
Chapter 30540
- DAC Data High Register (Dacx_Datnh)540
- DAC Control Register (Dacx_C0)541
- DAC Control Register 1 (Dacx_C1)542
- Functional Description543
- DMA Operation544
  - Freescale Semiconductor, Inc545
  - Freescale Semiconductor, Inc546
  - Introduction547
  - Modes of Operation548
  - KL25 Sub-Family Reference Manual, Rev. 3, September549
  - TPM_EXTCLK — TPM External Clock550
  - Freescale Semiconductor, Inc551
- Status and Control (Tpmx_Sc)552
- Counter (Tpmx_Cnt)553
- Modulo (Tpmx_Mod)554
- Channel (N) Status and Control (Tpmx_Cnsc)555
- Freescale Semiconductor, Inc556
- Channel (N) Value (Tpmx_Cnv)557
- Freescale Semiconductor, Inc558
- Configuration (Tpmx_Conf)559
  - Freescale Semiconductor, Inc560
  - Functional Description561
- Prescaler562
- Freescale Semiconductor, Inc563
- Input Capture Mode564
- Output Compare Mode565
- Freescale Semiconductor, Inc566
- Edge-Aligned PWM (EPWM) Mode567
- Center-Aligned PWM (CPWM) Mode568
- Freescale Semiconductor, Inc569
- Registers Updated from Write Buffers570
- Reset Overview571
  - Freescale Semiconductor, Inc572
  - Introduction573
  - Features574
  - KL25 Sub-Family Reference Manual, Rev. 3, September575
  - Freescale Semiconductor, Inc576
- PIT Upper Lifetime Timer Register (PIT_LTMR64H)577
- Timer Load Value Register (Pit_Ldvaln)578
- Timer Control Register (Pit_Tctrln)579
- Timer Flag Register (Pit_Tflgn)580
- Freescale Semiconductor, Inc581
- Interrupts582
- Example Configuration for Chained Timers583
- Example Configuration for the Lifetime Timer584
  - Freescale Semiconductor, Inc585
  - Freescale Semiconductor, Inc586
Chapter 41 Introduction587
Chapter 33 LPTMR Signal Descriptions588
- Low Power Timer Control Status Register (Lptmrx_Csr)589
- Low Power Timer Prescale Register (Lptmrx_Psr)590
- Freescale Semiconductor, Inc591
- Low Power Timer Compare Register (Lptmrx_Cmr)592
- KL25 Sub-Family Reference Manual, Rev. 3, September593
- Freescale Semiconductor, Inc594
- LPTMR Compare595
- LPTMR Hardware Trigger596
- Introduction597
Chapter 34598
- RTC Signal Descriptions598
- RTC Time Seconds Register (RTC_TSR)599
- RTC Time Alarm Register (RTC_TAR)600
- RTC Control Register (RTC_CR)601
- Freescale Semiconductor, Inc602
- RTC Status Register (RTC_SR)603
- RTC Lock Register (RTC_LR)604
- RTC Interrupt Enable Register (RTC_IER)605
- Functional Description606
Chapter 35612
- USB On-The-Go612
- USB-FS Features613
- Programmers Interface614
- OTG and Host Mode Operation644
  - Freescale Semiconductor, Inc645
  - Freescale Semiconductor, Inc646
- On-The-Go Operation647
  - OTG Dual Role a Device Operation648
  - OTG Dual Role B Device Operation649
Chapter 37657
- Block Diagrams657
- Freescale Semiconductor, Inc658
- External Signal Description659
Chapter 38690
- I2C Address Register 1 (I2Cx_A1)690
- I2C Frequency Divider Register (I2Cx_F)691
- I2C Control Register 1 (I2Cx_C1)692
- Freescale Semiconductor, Inc693
- I2C Status Register (I2Cx_S)694
- I2C Data I/O Register (I2Cx_D)695
- I2C Control Register 2 (I2Cx_C2)696
- I2C Programmable Input Glitch Filter Register (I2Cx_Flt)697
- I2C Range Address Register (I2Cx_Ra)698
- I2C Smbus Control and Status Register (I2Cx_Smb)699
- Freescale Semiconductor, Inc700
- I2C Address Register 2 (I2Cx_A2)701
- Bit Address707
- Freescale Semiconductor, Inc708
- Address Matching709
- Programmable Input Glitch Filter714
- Address Matching Wakeup715
- DMA Support716
Chapter 39725
- UART Baud Rate Register High (Uartx_Bdh)725
- UART Baud Rate Register Low (Uartx_Bdl)726
- UART Match Address Registers 1 (Uartx_Ma1)735
- UART Match Address Registers 2 (Uartx_Ma2)736
- UART Control Register 5 (Uartx_C5)737
  - Functional Description738
  - KL25 Sub-Family Reference Manual, Rev. 3, September739
- Receiver Functional Description740
  - Freescale Semiconductor, Inc741
  - Freescale Semiconductor, Inc742
- Additional UART Functions743
- Freescale Semiconductor, Inc744
- Interrupts and Status Flags745
- Register Definition750
Chapter 40751
- UART Baud Rate Register: High (Uartx_Bdh)751
- UART Control Register 1 (Uartx_C1)752
- UART Control Register 2 (Uartx_C2)753
- Freescale Semiconductor, Inc754
- UART Status Register 1 (Uartx_S1)755
- UART Status Register 2 (Uartx_S2)756
- Freescale Semiconductor, Inc757
- UART Control Register 3 (Uartx_C3)758
- Freescale Semiconductor, Inc759
- UART Data Register (Uartx_D)760
- Functional Description761
- Baud Rate Generation762
- Freescale Semiconductor, Inc763
- Receiver Functional Description764
  - Freescale Semiconductor, Inc765
  - Freescale Semiconductor, Inc766
  - Interrupts and Status Flags767
  - DMA Operation768
  - KL25 Sub-Family Reference Manual, Rev. 3, September769
  - Freescale Semiconductor, Inc770
  - Introduction771
  - Modes of Operation772
  - Memory Map and Register Definition773
  - Freescale Semiconductor, Inc774
- Port Data Output Register (Gpiox_Pdor)775
- Port Set Output Register (Gpiox_Psor)776
- Port Toggle Output Register (Gpiox_Ptor)777
- Port Data Direction Register (Gpiox_Pddr)778
- Freescale Semiconductor, Inc779
- Port Data Output Register (Fgpiox_Pdor)780
- Port Set Output Register (Fgpiox_Psor)781
- Port Toggle Output Register (Fgpiox_Ptor)782
- Port Data Direction Register (Fgpiox_Pddr)783
- Ioport784
  - Introduction785
  - KL25 Sub-Family Reference Manual, Rev. 3, September786
  - External Signal Description787
  - Freescale Semiconductor, Inc788
  - Freescale Semiconductor, Inc789
  - Freescale Semiconductor, Inc790
  - Freescale Semiconductor, Inc791
- TSI DATA Register (Tsix_Data)792
- TSI Threshold Register (Tsix_Tshd)793
- Capacitance Measurement794
  - Freescale Semiconductor, Inc795
  - Freescale Semiconductor, Inc796
- TSI Measurement Result797
- Scan Times798
- Current Source799
- Wake up MCU from Low Power Modes800
  - KL25 Sub-Family Reference Manual, Rev. 3, September801
  - Freescale Semiconductor, Inc802
  - Freescale Semiconductor, Inc803
  - Freescale Semiconductor, Inc804
  - Freescale Semiconductor, Inc805
  - Freescale Semiconductor, Inc807

NXP Semiconductors KL25 Series - Freescale Semiconductor, Inc

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