7733 datasheet(318/940 Pages) RENESAS

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Interrupt request which was used for

STOP AND WAIT MODES

7733 Group User’s Manual

11–11

Stopped

When not using watchdog timer

qWatchdog timer starts counting.

qSupply of

CPU

(internal clock

)

starts.

qInterrupt request which was used

for termination is accepted.

Internal clock

CPU

Internal peripheral devices

qSTP instruction

is executed

qInterrupt request which is

used for termination occurs.

qClock input from pin XIN or

XCIN starts.

Value of watchdog timer

“FFF16”

“7FF16”

Interrupt request

which is used for termination

(Interrupt request bit)

System clock

: f(XIN) or f(XCIN)

qInterrupt request which is

used for termination occurs.

qOscillation starts.

(When an external clock is

input from pin XIN, clock input

starts.)

Watchdog timer starts counting.

Internal clock

CPU

Internal peripheral devices

qSTP instruction

is executed

qWatchdog timer’s MSB = “0”

(However, watchdog timer interrupt

request does not occur.)

Supply of

CPU

(internal clock

)

starts.

termination is accepted.

Value of watchdog timer

“FFF16”

“7FF16”

Interrupt request

which is used for termination

(Interrupt request bit)

When using watchdog timer

System clock

: f(XIN) or f(XCIN)

Note 1: Sub clock (f(XCIN)) is stopped at

“L” level in the stop mode.

Stopped

32/f(XIN) ! 2048 counts

or 8/f(XCIN) ! 2048 counts

Stop mode

(Note 1)

.......

Operating

2/f(XIN) ! 7 counts

Stop mode

.......

(Note 2)

Stopped

Operating

Stopped

Note 2: In the stop mode, clock input can be stopped.

In order to stop clock input, be sure to generate an interrupt

request after a clock is stably

supplied when returning from

the stop mode.

“0”

“1”

“0”

“1”

11.3 Stop mode

Fig. 11.3.2 Stop mode terminating sequence by interrupt request occurrence

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