Mode Transitions; Figure 18.1 Block Diagram Of Flash Memory - Renesas H8S Series Hardware Manual

16-bit single-chip microcomputer

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Table of Contents

Section 18 ROM

Flash memory control register 1

Flash memory control register 2

Erase block register 1

Erase block register 2

RAM emulation register

Mode Transitions

When the mode pins and the FWE pin are set in the reset state and a reset-start is executed, this

LSI enters an operating mode as shown in figure 18.2. In user mode, flash memory can be read but

not programmed or erased.

The boot, user program and programmer modes are provided as modes to write and erase the flash

The differences between boot mode and user program mode are shown in table 18.1.

Rev. 6.00 Mar 15, 2006 page 456 of 570

REJ09B0211-0600

Internal address bus

Internal data bus (16 bits)

Bus interface/controller

Flash memory

(128 kbytes)