HD6432670 Hitachi, HD6432670 Datasheet - Page 822

• Manufacturer Part Number: HD6432670
• Description: (HD64F267x Series) 16-Bit Microcomputer
• Manufacturer: Hitachi

The operating mode enables or disables the on-chip ROM. The operating mode is selected by the
mode setting pins, such as the FWE and MD3 to MD0 pins as shown in table 3.1. Select modes 4
to 7 when the on-chip ROM is used, and mode 1 or 2 when the on-chip ROM is not used. The on-
chip ROM is allocated in area 0.
Rev. 2.0, 04/02, page 776 of 906
Figure 20.3 Block Diagram of 64-Kbyte Masked ROM (HD6432673)
H'000000
H'000002
H'00FFFE
Internal data bus (upper 8 bits)
Internal data bus (lower 8 bits)
Modes 4 and 7
H'000001
H'000003
H'00FFFF
H'100000
H'100002
H'10FFFE
Internal data bus (upper 8 bits)
Internal data bus (lower 8 bits)
Modes 5 and 6
H'100001
H'100003
H'10FFFF