H8S2245 datasheet(597/818 Pages) RENESAS

No. de pieza	H8S2245

Descripción Electrónicos	Renesas 16-Bit Single-Chip Microcomputer H8S Family / H8S/2200 Series

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Fabricante Electrónico	RENESAS [Renesas Technology Corp]

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Section 18 Power-Down Modes

Rev.3.00 Mar. 26, 2007 Page 555 of 772

REJ09B0355-0300

Section 18 Power-Down Modes

18.1

Overview

In addition to the normal program execution state, the H8S/2245 Group has power-down modes in

which operation of the CPU and oscillator is halted and power dissipation is reduced. Low-power

operation can be achieved by individually controlling the CPU, on-chip supporting modules, and

so on.

The H8S/2245 Group operating modes are as follows:

(1) High-speed mode

(2) Medium-speed mode

(3) Sleep mode

(4) Module stop mode

(5) Software standby mode

(6) Hardware standby mode

Of these, (2) to (6) are power-down modes. Sleep mode is a CPU mode, medium-speed mode is a

CPU and bus master mode, and module stop mode is an on-chip supporting module mode

(including bus masters other than the CPU). A combination of these modes can be set.

After a reset, the H8S/2245 Group is in high-speed mode.

Table 18.1 shows the conditions for transition to the various modes, the status of the CPU, on-chip

supporting modules, etc., and the method of clearing each mode.

H8S2245 Datasheet(PDF) 597 Page - Renesas Technology Corp