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HD6432351 Datasheet(PDF) 709 Page - Renesas Technology Corp

Part # HD6432351
Description  16-Bit Single-Chip Microcomputer
PDF  1025 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

HD6432351 Datasheet(HTML) 709 Page - Renesas Technology Corp

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Section 18 ROM (H8S/2351 Only)
Rev. 3.00 Sep 15, 2006 page 675 of 988
REJ09B0330-0300
Section 18 ROM (H8S/2351 Only)
18.1
Overview
The H8S/2351 has 64 kbytes of on-chip ROM (mask ROM). The ROM is connected to the
H8S/2000 CPU by a 16-bit data bus. The CPU accesses both byte data and word data in one state,
making possible rapid instruction fetches and high-speed processing.
The on-chip ROM is enabled or disabled by setting the mode pins (MD2, MD1, and MD0) and bit
EAE in BCRL.
18.1.1
Block Diagram
Figure 18.1 shows a block diagram of the on-chip ROM.
Internal data bus (upper 8 bits)
Internal data bus (lower 8 bits)
H'000000
H'000002
H'000004
H'00FFFE
H'000001
H'000003
H'000004
H'00FFFF
Figure 18.1 Block Diagram of ROM (H8S/2351)



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