M38203M4 Datasheet, PDF (265/344 Pages) Mitsubishi Electric Semiconductor – 8-BIT SINGLE-CHIP MICROCOMPUTER

APPLICATION
2.9 Standby function
qWhen restoring from stop mode by using INT0 interrupt (rising edge selected)
Stop mode ^{Oscillation stabilizing time}
(approximately 8000 cycles)
XIN or XCIN
(System clock)
XIN; “H”
XCIN; in high-impedance state
INT0 pin
Timer 1
counter
Timer 2
counter
“FF16”
“0116”
512 counts
INT0 interrupt
request bit
Oper-
Peripheral device _ating
Oper-
CPU ^ating
Stopping
Stopping
Operating
Operating
•Execute STP
instruction
•INT0 interrupt •512 counts down by timer 1
signal input
•Start supplying internal clock φ
(INT0 interrupt
to CPU
request occurs) •Accept INT0 interrupt request
•Oscillation start
•Timer 1 count start
Note: As a count source, f(XIN)/16 or f(XCIN)/16 is input. Either f(XIN)/16 or f(XCIN)/16
is selected by bit 7 of CPU mode register.
Fig. 2.9.2 Execution sequence example at restoration by occurrence of INT0 interrupt request
3820 GROUP USER’S MANUAL
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