Rev. 5.00, 09/03, page xxi of xliv
8.4.1
Transition to Standby Mode ................................................................................. 188
8.4.2
Canceling Standby Mode ..................................................................................... 189
8.4.3
Clock Pause Function........................................................................................... 190
8.5
Module Standby Function ................................................................................................. 191
8.5.1
Transition to Module Standby Function ............................................................... 191
8.5.2
Clearing Module Standby Function...................................................................... 191
8.6
Timing of STATUS Pin Changes ...................................................................................... 192
8.6.1
Timing for Resets ................................................................................................. 192
8.6.2
Timing for Canceling Standby ............................................................................. 194
8.6.3
Timing for Canceling Sleep Mode ....................................................................... 196
8.7
Hardware Standby Mode................................................................................................... 199
8.7.1
Transition to Hardware Standby Mode ................................................................ 199
8.7.2
Canceling Hardware Standby Mode..................................................................... 199
8.7.3
Hardware Standby Mode Timing ......................................................................... 200
Section 9 On-Chip Oscillation Circuits
......................................................................... 203
9.1
Overview ........................................................................................................................... 203
9.1.1
Features ................................................................................................................ 203
9.2
Overview of CPG .............................................................................................................. 204
9.2.1
CPG Block Diagram............................................................................................. 204
9.2.2
CPG Pin Configuration ........................................................................................ 206
9.2.3
CPG Register Configuration................................................................................. 206
9.3
Clock Operating Modes..................................................................................................... 207
9.4
Register Descriptions......................................................................................................... 211
9.4.1
Frequency Control Register (FRQCR) ................................................................. 211
9.5
Changing the Frequency.................................................................................................... 213
9.5.1
Changing the Multiplication Rate ........................................................................ 213
9.5.2
Changing the Division Ratio ................................................................................ 213
9.6
Overview of WDT............................................................................................................. 214
9.6.1
Block Diagram of WDT ....................................................................................... 214
9.6.2
Register Configuration ......................................................................................... 214
9.7
WDT Registers .................................................................................................................. 215
9.7.1
Watchdog Timer Counter (WTCNT) ................................................................... 215
9.7.2
Watchdog Timer Control/Status Register (WTCSR) ........................................... 215
9.7.3
Notes on Register Access ..................................................................................... 217
9.8
Using the WDT ................................................................................................................. 218
9.8.1
Canceling Standby................................................................................................ 218
9.8.2
Changing the Frequency....................................................................................... 218
9.8.3
Using Watchdog Timer Mode .............................................................................. 219
9.8.4
Using Interval Timer Mode .................................................................................. 219
9.9
Notes on Board Design...................................................................................................... 220
Summary of Contents for SH7709S
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