HD6432138SW datasheet(751/1061 Pages) RENESAS

Part #	HD6432138SW

Description	Renesas 16-Bit Single-Chip Microcomputer H8S Family/H8S/2100 Series

PDF	1061 Pages

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Manufacturer	RENESAS [Renesas Technology Corp]

Direct Link	http://www.renesas.com

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751 / 1061 page

Section 24 Power-Down State

Rev. 4.00 Jun 06, 2006 page 697 of 1004

REJ09B0301-0400

Oscillator

NMI

NMIEG

SSBY

NMI

exception

handling

NMIEG = 1

SSBY = 1

SLEEP instruction

Software standby mode

(power-down state)

Oscillation

settling time

tOSC2

NMI exception

handling

Figure 24.3 Software Standby Mode Application Example

24.6.5

Usage Note

In software standby mode, I/O port states are retained. Therefore, there is no reduction in current

dissipation for the output current when a high-level signal is output.

Current dissipation increases while waiting for oscillation to settle.

24.7

Hardware Standby Mode

24.7.1

Hardware Standby Mode

When the

STBY pin is driven low, a transition is made to hardware standby mode from any mode.

In hardware standby mode, all functions enter the reset state and stop operation, resulting in a

significant reduction in power dissipation. As long as the prescribed voltage is supplied, on-chip

RAM data is retained. I/O ports are set to the high-impedance state.

HD6432138SW Datasheet(PDF) 751 Page - Renesas Technology Corp