HD6432138SW datasheet(636/1061 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]

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Section 21 ROM (Mask ROM Version, H8S/2138 F-ZTAT, H8S/2134 F-ZTAT, and H8S/2132 F-ZTAT)

Rev. 4.00 Jun 06, 2006 page 582 of 1004

REJ09B0301-0400

21.4.3

Flash Memory Operating Modes

Mode Transitions: When the mode pins are set in the reset state and a reset-start is executed, the

MCU enters one of the operating modes shown in figure 21.3. In user mode, flash memory can be

read but not programmed or erased.

Flash memory can be programmed and erased in boot mode, user program mode, and programmer

mode.

Boot mode

On-board programming mode

User

program mode

User mode with

on-chip ROM

enabled

Reset state

Programmer

mode

RES = 0

SWE = 1

SWE = 0

Notes: Only make a transition between user mode and user program mode when the CPU is

not accessing the flash memory.

1. MD1 = MD0 = 0, P92 = P91 = P90 = 1

2. MD1 = MD0 = 0, P92 = 0, P91 = P90 = 1

RES = 0

MD1 = 1

Figure 21.3 Flash Memory Mode Transitions

HD6432138SW Datasheet(PDF) 636 Page - Renesas Technology Corp