H8SXSLASH1663 datasheet(1038/1158 Pages) RENESAS

Part #	H8SX/1663

Description	Renesas 32-Bit CISC Microcomputer H8SX Family / H8SX/1600 Series

PDF	1158 Pages

Scroll/Zoom	100%

Manufacturer	RENESAS [Renesas Technology Corp]

Direct Link	http://www.renesas.com

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1038 / 1158 page

Section 23 Power-Down Modes

Rev.1.00 Jun. 07, 2006 Page 986 of 1102

REJ09B0294-0100

23.7.4

Software Standby Mode Application Example

Figure 23.2 shows an example in which a transition is made to software standby mode at the

falling edge on the NMI pin, and software standby mode is cleared at the rising edge on the NMI

pin.

In this example, an NMI interrupt is accepted with the NMIEG bit in INTCR cleared to 0 (falling

edge specification), then the NMIEG bit is set to 1 (rising edge specification), the SSBY bit is set

to 1, and a SLEEP instruction is executed, causing a transition to software standby mode.

Software standby mode is then cleared at the rising edge on the NMI pin.

Oscillator

NMI

NMIEG

SSBY

NMI exception

handling

NMIEG = 1

SSBY = 1

SLEEP instruction

Software standby mode

(power-down mode)

Oscillation

settling time

tOSC2

NMI exception

handling

Figure 23.2 Software Standby Mode Application Example

H8SX/1663 Datasheet(PDF) 1038 Page - Renesas Technology Corp