6.
Resets ....................................................................................................................................................... 154
6.1
Overview ......................................................................................................................................................... 154
6.2
Register Descriptions ...................................................................................................................................... 156
6.2.1
Reset Status Register (RSTSR) .............................................................................................................. 156
6.2.2
Reset Control/Status Register (RSTCSR) .............................................................................................. 157
6.3
Operation ......................................................................................................................................................... 158
6.3.1
Pin Reset ................................................................................................................................................ 158
6.3.2
Deep Software Standby Reset ................................................................................................................ 158
6.3.3
Watchdog Timer Reset ........................................................................................................................... 158
6.4
Determining Reset Generation Source ............................................................................................................ 159
6.5
Usage Notes .................................................................................................................................................... 159
6.5.1
Notes on Design of Board ...................................................................................................................... 159
7.
Clock Generation Circuit ........................................................................................................................... 160
7.1
Overview ......................................................................................................................................................... 160
7.2
Register Descriptions ...................................................................................................................................... 161
7.2.1
System Clock Control Register (SCKCR) ............................................................................................. 162
7.3
Main Clock Oscillator ..................................................................................................................................... 164
7.3.1
Connecting a Crystal Resonator ............................................................................................................. 164
7.3.2
External Clock Input .............................................................................................................................. 165
7.4
PLL Circuit ..................................................................................................................................................... 165
7.5
Frequency Divider ........................................................................................................................................... 165
7.6
Internal Clock .................................................................................................................................................. 166
7.6.1
System Clock (ICLK) ............................................................................................................................ 166
7.6.2
Peripheral Module Clock (PCLK) .......................................................................................................... 166
7.6.3
External Bus Clock (BCLK) .................................................................................................................. 166
7.7
Usage Notes .................................................................................................................................................... 167
7.7.1
Notes on the Clock Generation Circuit .................................................................................................. 167
7.7.2
Notes on Resonator ................................................................................................................................ 168
7.7.3
Notes on Board Design .......................................................................................................................... 168
8.
Low Power Consumption .......................................................................................................................... 169
8.1
Overview ......................................................................................................................................................... 169
8.2
Register Descriptions ...................................................................................................................................... 172
8.2.1
Standby Control Register (SBYCR) ...................................................................................................... 174
8.2.2
Module Stop Control Register A (MSTPCRA)...................................................................................... 176
8.2.3
Module Stop Control Register B (MSTPCRB) ...................................................................................... 178
8.2.4
Module Stop Control Register C (MSTPCRC) ...................................................................................... 179
8.2.5
Deep Standby Control Register (DPSBYCR) ........................................................................................ 180
8.2.6
Deep Standby Wait Control Register (DPSWCR) ................................................................................. 182
8.2.7
Deep Standby Interrupt Enable Register (DPSIER) ............................................................................... 183