7220 Datasheet, PDF (119/303 Pages) Renesas Technology Corp – 8-BIT SINGLE-CHIP MICROCOMPUTER

FUNCTIONAL DESCRIPTION
2.14 Low-power dissipation mode
Stop mode
Time to hold internal reset state =
approximately 32768 cycles of XIN
input
Oscillation stabilizing time
VCC
RESET
2 µs or more
XIN
(Note)
Execute STP instruction Returned by reset input
Fig. 2.14.1 Oscillation stabilizing time at return by reset input
lWhen returning from stop mode by using INT1 interrupt (rising edge selected)
Stop mode
Oscillation stabilizing time
(approximately 32768 cycles)
XIN
(System clock)
XIN; HIGH
XCIN; in high-impedance state
INT1 pin
Timer 3
counter
Timer 4
counter
“FF16”
“0716”
2048 counts
INT1 interrupt
request bit
Peripheral device
CPU
Oper-
ating
Oper-
ating
Stopping
Stopping
Operating
Operating
•Execute STP
instruction
•INT1 interrupt •2048 counts down by timer 3
signal is input
•Supplying internal clock φ
(INT1 interrupt
to CPU is started
request occurs) •INT1 interrupt request is accepted
•Oscillation starts
•Timer 3 count starts
Fig. 2.14.2 Execution sequence example at return by occurrence of INT0 interrupt request
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7220 Group User’s Manual