7477 datasheet(182/354 Pages) RENESAS

Part #	7477

Description	8-BIT SINGLE-CHIP MICROCOMPUTER 740 FAMILY / 7470 SERIES

PDF	354 Pages

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Manufacturer	RENESAS [Renesas Technology Corp]

Direct Link	http://www.renesas.com

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182 / 354 page

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7470/7471/7477/7478 GROUP USER’S MANUAL

HARDWARE

1.17 Low-power dissipation function

Fig. 1.17.4 Example of recovery sequence from stop mode by INT0 interrupt

INT0 interrupt

request bit

INT0 pin

XIN or XCIN

“FF16”

Timer 3

Peripheral device

CPU

Stop mode

Timer 4

“0716”

•INT0 interrupt

signal input

(INT0 interrupt

request occurs)

•Oscillation start

•Timer 3 count start

•STP instruction

execution

Stop

Operating

Stop

Operating

Oscillation stabilizing wait time

2048 counts of timer 3

count source (Note)

Operating

Count down

qWhen recovering from stop mode by using INT interrupt (rising edge selected)

•Timer 4 overflow

•Start supplying internal

clock

φ to CPU

•Accept INT0 interrupt

request

Note: The count source is a count source of timer 3 before execution of the

instruction.

STP

Operating

Undefined

XIN, XCIN ; in high-impedance stat

XOUT ; “H”

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