SH7721 datasheet(555/1524 Pages) RENESAS

Part #	SH7721

Description	Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7700 Series

PDF	1524 Pages

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Manufacturer	RENESAS [Renesas Technology Corp]

Direct Link	http://www.renesas.com

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555 / 1524 page

Section 13

Power-Down Modes

Rev. 3.00

Jan. 18, 2008

Page 493 of 1458

REJ09B0033-0300

13.7.2

Software Standby Mode

(1)

Canceling software standby mode by an interrupt

CKIO

STATUS

WDT count

Interrupt request

Oscillation stops

WTD overflow

1. standby : LH (STATUS1 = Low, STATUS0 = High)

2. normal : LL (STATUS1 = Low, STATUS0 = Low)

Notes:

normal

standby

normal

Figure 13.4

STATUS Output when Software Standby Mode is Canceled by an Interrupt

(2)

Canceling software standby mode by a power-on reset

CKIO

STATUS

1. If a standby mode is canceled by a power on reset, the WDT stops counting.

RESETP must be kept low for the PLL oscillation stabilization time.

2. reset : HH (STATUS1 = High, STATUS0 = High)

3. standby : LH (STATUS1 = Low, STATUS0 = High)

4. normal : LL (STATUS1 = Low, STATUS0 = Low)

5. Bcyc : Bus clock cycle

Notes:

Undefined

0 to 30 Bcyc *5

0 to 10 Bcyc

normal

standby

reset

normal

RESETP

Reset

Oscillation stops

Figure 13.5

STATUS Output When Software Standby Mode is Canceled by a Power-on

Reset

SH7721 Datasheet(PDF) 555 Page - Renesas Technology Corp

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