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H8S/2214 Scheda tecnica(PDF) 603 Page - Renesas Technology Corp

Il numero della parte H8S/2214
Spiegazioni elettronici  16-Bit Single-Chip Microcomputer H8S Family/H8S/2200 Series
PDF  936 Pages
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Produttore elettronici  RENESAS [Renesas Technology Corp]
Homepage  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

H8S/2214 Scheda tecnica(HTML) 603 Page - Renesas Technology Corp

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Section 15 ROM
Rev.4.00 Sep. 18, 2008 Page 543 of 872
REJ09B0189-0400
Section 15 ROM
15.1
Overview
The H8S/2214 Group has 128 kbytes of on-chip ROM (flash memory or masked ROM). The
ROM is connected to the 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).
The flash memory versions can be erased and programmed on-board as well as with a PROM
programmer.
15.1.1
Block Diagram
Figure 15.1 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'000001
H'000003
H'01FFFE
H'01FFFF
Figure 15.1 Block Diagram of ROM



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