GMS81508A Datasheet, PDF (51/91 Pages) Hynix Semiconductor – USERS MANUAL

HYUNDAI MicroElectronics
When release the STOP Mode, to secure oscillation stabilization time, we use Basic Interval Timer.
So, before execution STOP instruction, we must select suitable B.I.T. clock for oscillation
stabilization time. Otherwise, It is possible to release by only RESET input.
Because STOP mode is released by interrupt, even if both of interrupt enable bit(IE) and interrupt
request flag is "1", STOP mode can not be executed.
STOP Command
STOP Mode
Interrupt Request
IE ?
0
1
STOP Mode Release
NOP
NOP
I-Flag ?
0
1
Interrupt Service Routine
 STOP Mode Releasing Flow
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