Maxim Integrated MAX32660 - Figure 9-1. RTC Block Diagram

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MAX32660 User Guide

Maxim Integrated Page 97 of 195

Figure 9-1. RTC Block Diagram

9.2 RTC Alarm Functions

The RTC provides time-ofday and sub-second interval alarm functions. The time-of-day alarm is implemented by matching

the count values in the counter register with the value stored in the alarm register. The sub-second interval alarm provides

an auto-reload timer that is driven by the trimmed RTC clock source.

Main Page

Table of Contents8
Introduction13
Overview13
Figure 2-1: MAX32660 High Level Block Diagram14
Figure 3-1: Code Memory Mapping15
Memory, Register Mapping, and Access15
Figure 3-2: Data Memory Map16
Table 3-1: APB Peripheral Base Address Map19
Table 4-1: Operating Voltage Range Selection and the Effect on V21
System Clocks, Reset, and Power Management21
Table 4-2: Minimum Flash Wait State Setting for each OVR Setting23
Figure 4-1: Clock Tree Diagram24
Table 4-3: Reset Sources and Effect on Oscillator Status25
Table 4-4: Reset Sources and Effect on System Oscillator Selection and Prescaler25
Table 4-5: Wake-Up Sources for each Low-Power Mode28
Table 4-6: Reset and Low Power Mode Effects29
Table 4-7: Instruction Cache Controller Register Addresses and Descriptions31
Table 4-8: ICC Cache ID Register31
Table 4-9: ICC Memory Size Register31
Table 4-10: ICC Cache Control Register32
Table 4-11: ICC Invalidate Register32
Table 4-12: Global Control Registers, Offsets and Descriptions33
Table 4-13: System Control Register33
Table 4-14: Reset 0 Register34
Table 4-15: System Clock Control Register36
Table 4-16: Power Management Register38
Table 4-17: Peripheral Clock Disable 0 Register38
Table 4-18: Memory Clock Control Register40
Table 4-19: Memory Zeroization Control Register42
Table 4-20: System Status Flag Register42
Table 4-21: Reset Register 143
Table 4-22: Peripheral Clock Disable Register 143
Table 4-23: Event Enable Register44
Table 4-24: Revision Register44
Table 4-25: System Status Interrupt Enable Register44
Table 4-26: System Initialization Registers, Offsets and Descriptions44
Table 4-27: Function Control Register 045
Table 4-28: System Initialization Address Error Register45
Table 4-29: Function Control Registers, Offsets and Descriptions45
Table 4-30: Function Control Register 045
Table 4-31: Power Sequencer Low Power Control Registers, Offsets, Access and Descriptions46
Table 4-32: Low Power Voltage Control Register47
Table 4-33: Low Power Mode Wakeup Flags for GPIO049
Table 4-34: Low Power Wakeup Enable for GPIO0 Register49
Table 4-35: RAM Shut down Register49
Table 5-1: Internal Flash Memory Organization51
Table 5-2: Valid Addresses for 32-Bit and 128-Bit Internal Flash Writes52
Table 5-3: Page Boundary Address Range for Page Erase Operations53
Table 5-4: Flash Controller Registers, Offsets, Access and Descriptions54
Table 5-5: Flash Controller Interrupt Register56
Table 5-6: Flash Controller Data Register 057
Table 5-7: Flash Controller Data Register 157
Table 5-8: Flash Controller Data Register 257
Table 5-9: Flash Controller Data Register 357
Table 6-2: GPIO Port, Pin Name and Alternate Function Matrix, 20-TQFN59
Table 6-1: GPIO Port, Pin Name and Alternate Function Matrix, 16-WLP59
Table 6-3: Standard GPIO Drive Strength Selection61
Table 6-4: GPIO with I 2 C Alternate Function Drive Strength Selection61
Table 6-5: GPIO Mode and Alternate Function Selection61
Table 6-6: GPIO Port Interrupt Vector Mapping62
Table 6-7: GPIO Wakeup Interrupt Vector62
Table 6-8: GPIO Port 0 Registers63
Table 6-9: GPIO Alternate Function 0 Select Register63
Table 6-10: GPIO Output Enable Register64
Table 6-11: GPIO Output Register64
Table 6-12: GPIO Input Register65
Table 6-13: GPIO Port Interrupt Mode Register65
Table 6-14: GPIO Port Interrupt Polarity Registers65
Table 6-15: GPIO Port Interrupt Enable Registers65
Table 6-16: GPIO Interrupt Flag Register66
Table 6-17: GPIO Wakeup Enable Registers66
Table 6-18: GPIO Interrupt Dual Edge Mode Registers66
Table 6-19: GPIO Pullup/Pulldown Enable Register67
Table 6-20: GPIO Alternate Function Select Register67
Table 6-21: GPIO Input Hysteresis Enable Register67
Table 6-22: GPIO Slew Rate Enable Register67
Table 6-23: GPIO Drive Strength 0 Select Register68
Table 6-24: GPIO Drive Strength 1 Select Register69
Table 6-25: GPIO Pullup/Pulldown Select Register70
Figure 7-1: DMAC Block Diagram71
Table 7-1: DMA Channel Registers71
Table 7-2: Channel Reload Registers72
Table 7-3: Source and Destination Address Definition73
Table 7-4: Data Movement from Source to DMA FIFO73
Table 7-5: Data Movement from the DMA FIFO to Destination74
Table 7-6: Standard DMA Control Registers, Offsets, Access and Descriptions77
Table 7-7: DMA Interrupt Enable Register77
Table 7-8: DMA Interrupt Flag Register77
Table 7-9: Standard DMA Channel 0 to Channel 15 Offsets78
Table 7-10: Dman Channel Registers, Offsets, Access and Descriptions78
Table 7-11: DMA Configuration Register79
Table 7-12: DMA Status Register81
Table 7-13: DMA Source Register82
Table 7-14: DMA Destination Register82
Table 7-15: DMA Count Register82
Table 7-16: DMA Source Reload Register83
Table 7-17: DMA Destination Reload Register83
Table 7-18: DMA Count Reload Register83
Table 8-1: Example Baud Rate Calculation Results, Target Bit Rate = 1.8Mbps, F86
Table 8-2: UART Registers, Offset Addresses and Descriptions87
Table 8-3: UART Control 0 Register87
Table 8-4: UART Control 1 Register89
Table 8-5: UART Status Register90
Table 8-6: UART Interrupt Enable Register91
Table 8-7: UART Interrupt Flags Register92
Table 8-8: UART Rate Integer Register93
Table 8-9: UART Baud Rate Decimal Register93
Table 8-10: UART FIFO Register94
Table 8-11: UART DMA Configuration Register94
Table 8-12: UART TX FIFO Data Output Register94
Figure 9-1. RTC Block Diagram97
Table 9-1. RTC Registers, Offsets and Descriptions100
Table 9-2: RTC Seconds Counter Register100
Table 9-3: RTC Sub-Seconds Counter Register101
Table 9-4: RTC Sub-Seconds Counter Register101
Table 9-5: RTC Sub-Second Alarm Register101
Table 9-6: RTC Control Register101
Table 9-7: RTC Trim Register103
Figure 10-1: One-Shot Mode Diagram107
Figure 10-2: Continuous Mode Diagram109
Figure 10-3: Counter Mode Diagram111
Figure 10-4: Capture Mode Diagram115
Figure 10-5: Counter Mode Diagram117
Figure 10-6: Gated Mode Diagram119
Table 10-1: Timer Register Offsets, Names, Access and Descriptions122
Table 10-2: Timer Count Registers122
Table 10-3: Timer Compare Registers122
Table 10-4: Timer PWM Registers123
Table 10-5: Timer Interrupt Registers123
Table 10-6: Timer Control Registers123
Figure 11-1: Watchdog Timer Block Diagram126
Table 11-1: Watchdog Timer Interrupt Period with F127
Table 11-2: Watchdog Timer Registers129
Table 11-3: Watchdog Timer Control Register129
Table 11-4: Watchdog Timer Reset Register130
Table 12-1: I 2 C Bus Terminology131
Figure 12-1: the Roles of I C Devices and the Direction the I C Signals132
Figure 12-2: I C Write Data Transfer134
Figure 12-3: I C Specification Minimum and Maximum Clock Parameters for Standard and Fast Mode136
Table 12-2: I C Address Byte Format138
Figure 12-4: I C Clock Period142
Table 12-3: I C Registers144
Table 12-4: I 2 C Control Registers 0145
Table 12-5: I C Status Registers147
Table 12-6: I 2 C Interrupt Status Flags Registers 0148
Table 12-7: I C Interrupt Enable 0 Registers150
Table 12-8: I C Interrupt Status Flags 1 Registers151
Table 12-9: I 2 C Interrupt Enable Registers 1151
Table 12-10: I C FIFO Length Registers152
Table 12-11: I 2 C Receive Control Registers 0152
Table 12-12: I C Receive Control 1 Registers153
Table 12-13: I 2 C Transmit Control Registers 0153
Table 12-14: I 2 C Transmit Control Registers 1154
Table 12-15: I C Data Registers155
Table 12-16: I C Master Mode Control Registers155
Table 12-17: I C SCL Low Control Register156
Table 12-18: I C SCL High Control Register156
Table 12-19: I C Timeout Registers156
Table 12-20: I C Timeout Registers157
Table 12-21: I C Slave Address Register157
Table 12-22: I C DMA Register158
Figure 13-1: SPI0 Block Diagram159
Figure 13-2: 4-Wire SPI Connection Diagram160
Table 13-1: Four-Wire SPI Signals160
Figure 13-3: 3-Wire SPI Connection Diagram161
Table 13-2: Three-Wire SPI Signals161
Table 13-3: SPI0 Pins162
Figure 13-4: SCK Clock Rate Control163
Table 13-4. Clock Phase and Polarity Operation164
Figure 13-5: SPI Clock Polarity164
Figure 13-6. SPI Timing (Spi0_Ctrl2.Clk_Pha = 0)165
Figure 13-7. SPI Timing (Spi0_Ctrl2.Clk_Pha = 1)166
Figure 13-8: Three-Wire SPI Read167
Figure 13-9: Three-Wire SPI Write167
Table 13-5: SPI0 Master Register Addresses and Descriptions169
Table 13-6: SPI FIFO Data Registers169
Table 13-7: SPI Master Signals Control Registers169
Table 13-8: SPI Transmit Packet Size Register171
Table 13-9: SPI Static Configuration Registers171
Table 13-10: SPI Slave Select Timing Register172
Table 13-11: SPI Master Clock Configuration Registers172
Table 13-12: SPI DMA Control Registers173
Table 13-13: SPI Interrupt Flag Registers174
Table 13-14: SPI Interrupt Enable Registers176
Table 13-15: SPI Wakeup Status Flags Registers177
Table 13-16: SPI Wakeup Enable Registers177
Table 13-17: SPI Status Registers177
Table 14-1: Four-Wire SPI Signals179
Figure 14-1. SPIMSS Block Diagram179
Table 14-2: I S Signals180
Figure 14-2: 4-Wire SPI Connection Diagram180
Table 14-3: SPIMSS Pins for SPI1 and I 2 S181
Table 14-4. Clock Phase and Polarity Operation182
Figure 14-3: I S Audio Data in Standard I S Operation186
Figure 14-4: I S Mode (I2S_En=1, I2S_Lj=1)186
Table 14-5: SPIMSS Register Offsets, Access and Descriptions189
Table 14-6. SPIMSS Data Register189
Table 14-7: SPIMSS Control Register189
Table 14-8: SPIMSS Interrupt Flag Register190
Table 14-9: SPIMSS Mode Register191
Table 14-10: SPIMSS Bit Rate Generator Register192
Table 14-11: SPIMSS DMA Register192
Table 14-12: SPIMSS I 2 S Control Register194

Maxim Integrated MAX32660 - Figure 9-1. RTC Block Diagram

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