H8SLASH3028F datasheet(77/923 Pages) RENESAS

No. de pieza	H8/3028F

Descripción Electrónicos	Renesas 16-Bit Single-Chip Microcomputer H8 Family/H8/300H Series

PDF	923 Pages

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Fabricante Electrónico	RENESAS [Renesas Technology Corp]

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77 / 923 page

Rev. 2.00, 09/03, page 47 of 890

2.8

Processing States

2.8.1

Overview

The H8/300H CPU has five processing states: the program execution state, exception-handling

state, power-down state, reset state, and bus-released state. The power-down state includes sleep

mode, software standby mode, and hardware standby mode. Figure 2.11 classifies the processing

states. Figure 2.13 indicates the state transitions.

Processing states

Program execution state

Bus-released state

Reset state

Power-down state

The CPU executes program instructions in sequence

A transient state in which the CPU executes a hardware sequence

(saving PC and CCR, fetching a vector, etc.) in response to a reset,

interrupt, or other exception

The external bus has been released in response to a bus request

signal from a bus master other than the CPU

The CPU and all on-chip supporting modules are initialized and halted

The CPU is halted to conserve power

Sleep mode

Software standby mode

Hardware standby mode

Exception-handling state

Figure 2.11 Processing States

H8/3028F Datasheet(PDF) 77 Page - Renesas Technology Corp