hd66100 Renesas Electronics Corporation., hd66100 Datasheet - Page 132

• Manufacturer Part Number: hd66100
• Description: H8/3867 Series
• Manufacturer: Renesas Electronics Corporation.

6.1
The H8/3862 and H8/3822 have 16 kbytes of on-chip mask ROM, the H8/3863 and H8/3823 have
24 kbytes, the H8/3864 and H8/3824 have 32 kbytes, the H8/3865 and H8/3825 have 40 kbytes,
the H8/3866 and H8/3826 have 48 kbytes, and the H8/3867 and H8/3827 have 60 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 H8/3867 and H8/3827 have a ZTAT™ version with 60-kbyte
PROM.
6.1.1
Figure 6.1 shows a block diagram of the on-chip ROM.
Overview
Block Diagram
H'7FFE
H'0000
H'0002
Figure 6.1 ROM Block Diagram (H8/3864 and H8/3824)
Even-numbered
Internal data bus (upper 8 bits)
address
Internal data bus (lower 8 bits)
H'7FFE
H'0000
H'0002
Section 6 ROM
On-chip ROM
Odd-numbered
address
H'7FFF
H'0001
H'0003
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