HD6432138SW datasheet(631/1061 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 577 of 1004

REJ09B0301-0400

Section 21 ROM

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

H8S/2134 F-ZTAT, and H8S/2132 F-ZTAT)

21.1

Overview

The H8S/2138 and H8S/2134 have 128 kbytes of on-chip ROM, the H8S/2133 has 96 kbytes, the

H8S/2137 and H8S/2132 have 64 kbytes, and the H8S/2130 has 32 kbytes. The ROM is connected

to the CPU by a 16-bit data bus. The CPU 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 lineups for the H8S/2138, H8S/2134, and H8S/2132 include flash memory versions which can

be erased and programmed on-board as well as by a general-purpose PROM programmer.

21.1.1

Block Diagram

Figure 21.1 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 21.1 ROM Block Diagram (H8S/2138, H8S/2134)

HD6432138SW Datasheet(PDF) 631 Page - Renesas Technology Corp