HD6475328-CP10 Datasheet, PDF (324/459 Pages) Hitachi Semiconductor – original Hitachi CMOS microcomputer unit (MCU)

18.4.3 Timing Sequence of Hardware Standby Mode
Figure 18-2 shows the usual sequence for entering and leaving the hardware standby mode.
First the RES pin goes Low, placing the chip in the reset state. Then the STBY pin goes Low,
placing the chip in the hardware standby mode and stopping the clock. In the recovery sequence
first the STBY pin goes High; then after the clock stabilizes, the RES pin is returned to the High
level.
Oscillator
RES
STBY
Clock setting time
Restart
Figure 18-2 Hardware Standby Sequence
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