HD6432160 RENESAS [Renesas Technology Corp], HD6432160 Datasheet - Page 647

• Manufacturer Part Number: HD6432160
• Description: Hitachi 16-Bit Single-Chip Microcomputer
• Manufacturer: RENESAS [Renesas Technology Corp]

This series incorporates a 64-kbyte or 128-kbyte masked ROM. The on-chip ROM is connected to
the CPU and data transfer controller (DTC) via the 16-bit data bus. The CPU and DTC can access
the on-chip ROM with 8- or 16-bit width. Data in the on-chip ROM can always be accessed in one
state.
The on-chip ROM is enabled or disabled according to the operating mode. The operating mode is
selected by the mode select pins MD1 and MD0 as indicated in table 3.1. Select mode 2 or 3 to
enable the on-chip ROM; whereas mode 1 to disable the on-chip ROM. The on-chip ROM is
allocated in area 0.
Figure 24.1 Block Diagram of 128-Kbyte Masked ROM (HD6432161BV)
Figure 24.2 Block Diagram of 64-Kbyte Masked ROM (HD6432160BV)
H'00FFFE
H'01FFFE
H'000000
H'000002
H'000000
H'000002
Internal data bus (upper 8 bits)
Internal data bus (upper 8 bits)
Internal data bus (lower 8 bits)
Internal data bus (lower 8 bits)
Mode 2
Mode 2
Section 24 Masked ROM
H'01FFFF
H'00FFFF
H'000001
H'000003
H'000001
H'000003
H'DFFE
H'DFFE
H'0000
H'0002
H'0000
H'0002
Internal data bus (upper 8 bits)
Internal data bus (upper 8 bits)
Internal data bus (lower 8 bits)
Internal data bus (lower 8 bits)
Rev. 2.0, 08/02, page 607 of 788
Mode 3
Mode 3
H'DFFF
H'DFFF
H'0001
H'0003
H'0001
H'0003