HD64F38024HV Datasheet, PDF (167/684 Pages) Renesas Technology Corp – Hardware Manual Renesas 8-Bit Single-Chip Microcomputer H8 Family/H8/300L Super Low Power Series

Section 6 ROM
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.
Internal data bus (upper 8 bits)
Internal data bus (lower 8 bits)
H'0000
H'0002
H'0000
H'0002
H'0001
H'0003
On-chip ROM
H'7FFE
H'7FFE
Even-numbered
address
H'7FFF
Odd-numbered
address
Figure 6.1 ROM Block Diagram (H8/38024)
Rev. 8.00 Mar. 09, 2010 Page 145 of 658
REJ09B0042-0800