Fujitsu FR81S User Manual
CHAPTER 30: POWER CONSUMPTION CONTROL
5. Operation
FUJITSU SEMICONDUCTOR LIMITED
CHAPTER : POWER CONSUMPTION CONTROL
FUJITSU SEMICONDUCTOR CONFIDENTIAL
27
5.4. Standby Mode : Watch Mode
This section describes standby mode: watch mode.
Watch mode is the mode to continue oscillation only for the specific clock and count the clock timer
corresponding to that clock. When the sub clock (SBCLK) is selected as the clock source, only the sub
clock oscillates and only the sub timer counts.
Notes:
⋅
Enter the device into the standby mode only when main RUN or sub RUN is in progress. For the
operation at a transition from the PLL-run state to its standby mode, see "5.9 Transition to Illegal
Standby Mode".
⋅
Transition to the standby mode while the FLASH memory is being programmed / erased is prohibited.
MB91520 Series
MN705-00010-1v0-E
1114