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User’s Manual U18172EJ3V0UD
11
10.4.3 Interrupt request pending .............................................................................................................. 185
CHAPTER 11 STANDBY FUNCTION.................................................................................................. 186
11.1 Standby Function and Configuration ..................................................................................... 186
11.1.1 Standby function ........................................................................................................................... 186
11.1.2 Registers used during standby (
μPD78F920x only) ...................................................................... 188
11.2 Standby Function Operation ................................................................................................... 189
11.2.1 HALT mode ................................................................................................................................... 189
11.2.2 STOP mode .................................................................................................................................. 192
CHAPTER 12 RESET FUNCTION ....................................................................................................... 196
12.1 Register for Confirming Reset Source................................................................................... 203
CHAPTER 13 POWER-ON-CLEAR CIRCUIT ..................................................................................... 204
13.1 Functions of Power-on-Clear Circuit ..................................................................................... 204
13.2 Configuration of Power-on-Clear Circuit ............................................................................... 205
13.3 Operation of Power-on-Clear Circuit...................................................................................... 205
13.4 Cautions for Power-on-Clear Circuit ...................................................................................... 206
CHAPTER 14 LOW-VOLTAGE DETECTOR ....................................................................................... 208
14.1 Functions of Low-Voltage Detector........................................................................................ 208
14.2 Configuration of Low-Voltage Detector ................................................................................. 208
14.3 Registers Controlling Low-Voltage Detector......................................................................... 209
14.4 Operation of Low-Voltage Detector ........................................................................................ 211
14.5 Cautions for Low-Voltage Detector ........................................................................................ 215
CHAPTER 15 OPTION BYTE ............................................................................................................... 218
15.1 Functions of Option Byte ........................................................................................................ 218
15.1.1
μPD78F920x ................................................................................................................................. 218
15.1.2
μPD78F950x ................................................................................................................................. 219
15.2 Format of Option Byte ............................................................................................................. 220
15.2.1
μPD78F920x ................................................................................................................................. 220
15.2.2
μPD78F950x ................................................................................................................................. 222
15.3 Caution When the RESET Pin Is Used as an Input-Only Port Pin (P34) ............................. 223
CHAPTER 16 FLASH MEMORY.......................................................................................................... 224
16.1 Features..................................................................................................................................... 224
16.2 Memory Configuration ............................................................................................................. 225
16.3 Functional Outline .................................................................................................................... 225
16.4 Writing with Flash Memory Programmer ............................................................................... 226
16.5 Programming Environment ..................................................................................................... 227
16.6 Processing of Pins on Board .................................................................................................. 229
16.6.1 X1 and X2 pins (
μPD78F920x)...................................................................................................... 229
16.6.2 EXCLK pin (
μPD78F950x) ............................................................................................................ 230