
User’s Manual U12768EJ4V1UD
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8.4
Operation................................................................................................................................ 211
8.4.1
Operation as watch timer...........................................................................................................211
8.4.2
Operation as interval timer ........................................................................................................211
8.4.3
Cautions ....................................................................................................................................212
CHAPTER 9 WATCHDOG TIMER ....................................................................................................... 213
9.1
Functions................................................................................................................................ 213
9.2
Configuration ......................................................................................................................... 215
9.3
Watchdog Timer Control Register ....................................................................................... 215
9.4
Operation................................................................................................................................ 218
9.4.1
Operating as watchdog timer.....................................................................................................218
9.4.2
Operating as interval timer ........................................................................................................219
9.5
Standby Function Control Register ..................................................................................... 220
CHAPTER 10 SERIAL INTERFACE FUNCTION ............................................................................... 221
10.1 Overview................................................................................................................................. 221
10.2 3-Wire Serial I/O (CSI0 to CSI2) ............................................................................................ 221
10.2.1
Configuration .............................................................................................................................222
10.2.2
CSIn control registers ................................................................................................................223
10.2.3
Operations.................................................................................................................................225
10.3 I
2C Bus (Interface I2C) ............................................................................................................ 228
10.3.1
Configuration .............................................................................................................................231
10.3.2
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2C control registers ...................................................................................................................233
10.3.3
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2C bus mode functions..............................................................................................................243
10.3.4
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2C bus definitions and control methods.....................................................................................244
10.3.5
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2C interrupt request (INTIIC0) ...................................................................................................251
10.3.6
Interrupt request (INTIIC0) generation timing and wait control ..................................................269
10.3.7
Address match detection method ..............................................................................................270
10.3.8
Error detection ...........................................................................................................................270
10.3.9
Extension code ..........................................................................................................................270
10.3.10 Arbitration ..................................................................................................................................271
10.3.11 Wakeup function........................................................................................................................272
10.3.12 Communication reservation .......................................................................................................273
10.3.13 Cautions ....................................................................................................................................276
10.3.14 Communication operations ........................................................................................................277
10.3.15 Timing of data communication...................................................................................................279
10.4 Asynchronous Serial Interface (UART0, UART1)............................................................... 286
10.4.1
Configuration .............................................................................................................................286
10.4.2
UARTn control registers ............................................................................................................288
10.4.3
Operations.................................................................................................................................294
10.4.4
Standby function........................................................................................................................307
CHAPTER 11 A/D CONVERTER ......................................................................................................... 308
11.1 Function.................................................................................................................................. 308
11.2 Configuration ......................................................................................................................... 310
11.3 Control Registers................................................................................................................... 312