HD6432138SW datasheet(677/1061 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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Section 22 ROM (H8S/2138 F-ZTAT A-Mask Version, H8S/2134 F-ZTAT A-Mask Version)

Rev. 4.00 Jun 06, 2006 page 623 of 1004

REJ09B0301-0400

Section 22 ROM

(H8S/2138 F-ZTAT A-Mask Version,

H8S/2134 F-ZTAT A-Mask Version)

22.1

Overview

H8S/2138 F-ZTAT A-mask version and H8S/2134 F-ZTAT A-mask version have 128 kbytes of

on-chip flash memory. The flash memory is connected to the bus master by a 16-bit data bus. The

bus master accesses both byte and word data in one state, enabling faster instruction fetches and

higher processing speed.

The mode pins (MD1 and MD0) and the EXPE bit in MDCR can be set to enable or disable the

on-chip ROM.

The flash memory version of this group can be erased and programmed on-board as well as with a

general-purpose PROM programmer.

22.1.1

Block Diagram

Figure 22.1 shows a block diagram of the ROM.

H'000000

H'000002

H'01FFFE

H'000001

H'000003

H'01FFFF

Internal data bus (upper 8 bits)

Internal data bus (lower 8 bits)

Figure 22.1 ROM Block Diagram

HD6432138SW Datasheet(PDF) 677 Page - Renesas Technology Corp