H838024 datasheet(185/697 Pages) RENESAS

Part #	H838024

Description	Renesas 8-Bit Single-Chip Microcomputer Super Low Power Series

PDF	697 Pages

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Manufacturer	RENESAS [Renesas Technology Corp]

Direct Link	http://www.renesas.com

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185 / 697 page

Section 6 ROM

Rev. 7.00 Mar 10, 2005 page 143 of 652

REJ09B0042-0700

Section 6 ROM

6.1

Overview

The H8/38024, H8/38024S, and H8/38124 have 32 Kbytes of on-chip mask ROM, the H8/38023,

H8/38023S, and H8/38123 have 24 Kbytes, the H8/38022, H8/38022S, and H8/38122 have 16

Kbytes, the H8/38021, H8/38021S, and H8/38121 have 12 Kbytes, and the H8/38020, H8/38020S,

and H8/38120 have 8 Kbytes. The ROM is connected to the CPU by a 16-bit data bus, allowing

high-speed two-state access for both byte data and word data. The H8/38024 has a ZTAT version

and F-ZTAT version with 32-Kbyte PROM and flash memory. F-ZTAT™ versions of the

H8/38124 and H8/38122 are available. The former has 32 Kbytes, and the latter 16 Kbytes, of

flash memory.

6.1.1

Block Diagram

Figure 6.1 shows a block diagram of the on-chip ROM.

H'7FFE

H'7FFF

Internal data bus (upper 8 bits)

Internal data bus (lower 8 bits)

Even-numbered

address

Odd-numbered

address

H'7FFE

H'0002

H'0000

H'0002

H'0001

H'0003

On-chip ROM

Figure 6.1 ROM Block Diagram (H8/38024)

H838024 Datasheet(PDF) 185 Page - Renesas Technology Corp