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17.4.2 GPIO Control .................................................................................................. 1200
17.4.3 AUX Timers .................................................................................................... 1203
17.4.4 Time-to-Digital Converter..................................................................................... 1203
17.4.5 Semaphores ................................................................................................... 1204
17.4.6 Oscillator Configuration Interface (DDI) .................................................................... 1204
17.4.7 Analog Configuration Interface (ADI) ....................................................................... 1204
17.4.8 Analog MUX ................................................................................................... 1205
17.4.9 ADC ............................................................................................................. 1205
17.4.10 Comparators.................................................................................................. 1208
17.4.11 Current source ............................................................................................... 1208
17.5 Power Management..................................................................................................... 1208
17.5.1 Startup .......................................................................................................... 1208
17.5.2 Power Mode Management ................................................................................... 1208
17.5.3 Wakeup Events................................................................................................ 1209
17.5.4 MCU Bus Connection......................................................................................... 1210
17.6 Clock Management ..................................................................................................... 1210
17.6.1 System Clocks................................................................................................. 1210
17.6.2 Sensor Controller Clock ...................................................................................... 1211
17.6.3 Peripheral Clocks ............................................................................................. 1211
17.7 Use Cases................................................................................................................ 1211
17.7.1 RTC Calibration ............................................................................................... 1211
17.7.2 Capacitive Sensing............................................................................................ 1211
17.7.3 Pulse Counting ................................................................................................ 1211
17.8 AUX – Sensor Controller Registers................................................................................... 1211
17.8.1 AUX_AIODIO Registers ...................................................................................... 1212
17.8.2 AUX_TDC Registers .......................................................................................... 1221
17.8.3 AUX_EVCTL Registers....................................................................................... 1235
17.8.4 AON_WUC Registers......................................................................................... 1257
17.8.5 AUX_TIMER Registers ....................................................................................... 1273
17.8.6 AUX_SMPH Registers........................................................................................ 1282
17.8.7 AUX_ANAIF Registers ....................................................................................... 1292
17.8.8 ADI_4_AUX Registers ........................................................................................ 1299
18 Battery Monitor and Temperature Sensor........................................................................... 1311
18.1 Introduction............................................................................................................... 1312
18.2 Functional Description .................................................................................................. 1312
18.3 BATMON Registers ..................................................................................................... 1312
18.3.1 AON_BATMON Registers.................................................................................... 1313
19 Universal Asynchronous Receivers and Transmitters (UARTS) ............................................ 1327
19.1 Universal Asynchronous Receiver/Transmitter...................................................................... 1328
19.2 Block Diagram ........................................................................................................... 1329
19.3 Signal Description ....................................................................................................... 1329
19.4 Functional Description .................................................................................................. 1329
19.4.1 Transmit and Receive Logic ................................................................................. 1330
19.4.2 Baud-Rate Generation........................................................................................ 1330
19.4.3 Data Transmission ............................................................................................ 1330
19.4.4 Modem Handshake Support ................................................................................. 1331
19.4.5 FIFO Operation ................................................................................................ 1332
19.4.6 Interrupts ....................................................................................................... 1332
19.4.7 Loopback Operation .......................................................................................... 1333
19.5 Interface to DMA ........................................................................................................ 1333
19.6 Initialization and Configuration......................................................................................... 1334
19.7 UARTS Registers ....................................................................................................... 1335
19.7.1 UART Registers ............................................................................................... 1336
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SWCU117A–February 2015–Revised March 2015 Contents
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