HD6433044 Hitachi Semiconductor, HD6433044 Datasheet - Page 566

• Manufacturer Part Number: HD6433044
• Description: (HD64 Series) Hitachi Single-Chip Microcomputer
• Manufacturer: Hitachi Semiconductor

18.1 Overview
The H8/3048 has 128 kbytes of on-chip ROM, the H8/3047 has 96 kbytes, the H8/3045 has
64 kbytes and the H8/3044 has 32 kbytes. The ROM is connected to the CPU by a 16-bit data bus.
The CPU accesses both byte data and word data in two states, enabling rapid data transfer.
The mode pins (MD
table 18-1.
Table 18-1 Operating Mode and ROM
Mode
Mode 1 (1-Mbyte expanded mode with on-chip ROM disabled)
Mode 2 (1-Mbyte expanded mode with on-chip ROM disabled)
Mode 3 (16-Mbyte expanded mode with on-chip ROM disabled)
Mode 4 (16-Mbyte expanded mode with on-chip ROM disabled)
Mode 5 (1-Mbyte expanded mode with on-chip ROM enabled)
Mode 6 (16-Mbyte expanded mode with on-chip ROM enabled)
Mode 7 (single-chip mode)
The PROM version (H8/3048-ZTAT) and the flash memory version (H8/3048F-ZTAT) can be set
to PROM mode and programmed with a general-purpose PROM programmer.
2
to MD
0
) can be set to enable or disable the on-chip ROM as indicated in
Section 18 ROM
557
MD
0
0
0
1
1
1
1
2
Mode Pins
MD
0
1
1
0
0
1
1
1
MD
1
0
1
1
1
0
0
0
Disabled
(external
address area)
On-Chip ROM
Enabled