GMS81004 Datasheet, PDF (82/101 Pages) Hynix Semiconductor – 8-BIT SINGLE CHIP MICROCOMPUTERS

Chapter6. Standby Function
6.3.2 In Case of Interrupt Enable Flag(I) of PSW = 1
Released by only interrupt which each interrupt enable flag = 1, and jump to the relevant
interrupt service routine.
Note) When STOP instruction is used, B.I.T should guarantee the stabilization oscillation
time. Thus, just before entering STOP mode, clock of bit10(PS10) of Prescaler is
selected or peripheral hardware clock control bit(ENPCK) to 1, Therefore the clock
necessary for stabilization oscillation time should be input into B.I.T. otherwise, Standby
mode is released by reset signal. In case of interrupt request flag and interrupt enable
flag are both ¡È1¡È, Standby mode is not entered.
Fig. 6.5 Standby Mode Release Flow
STOP Command
Standby Mode
Interrupt Request GEN.
0
IE Flag
1
Standby Mode Release
PSW
0
IE Flag
1
Interrupt Service Routine
Standby Next Command
Execution
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