HD64F3028F25 Datasheet, PDF (605/925 Pages) Renesas Technology Corp – Hardware Manual Renesas 16-Bit Single-Chip Microcomputer H8 Family/H8/300H Series

Section 18 ROM
(H8/3028F-ZTAT, Mask ROM Version)
18.1 Flash Memory Version Overview
The H8/3028F-ZTAT has 384 kbytes of on-chip flash memory. The flash memory 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 on-chip ROM is enabled and disabled by setting the mode pins (MD₂ to MD₀) as shown in
table 18.1.
The on-chip flash memory product (H8/3028F-ZTAT) can be erased and programmed on-board,
as well as with a special-purpose PROM programmer.
Table 18.1 Operating Modes and ROM
Mode
Mode 1 (expanded 1-Mbyte mode with on-chip ROM
disabled)
Mode 2 (expanded 1-Mbyte mode with on-chip ROM
disabled)
Mode 3 (expanded 16-Mbyte mode with on-chip ROM
disabled)
Mode 4 (expanded 16-Mbyte mode with on-chip ROM
disabled)
Mode 5 (expanded 16-Mbyte mode with on-chip ROM
enabled)
Mode 6 (single-chip normal mode)
Mode 7 (single-chip advanced mode)
Mode Pins
MD2 MD1 MD0
0
0
1
0
1
0
On-Chip ROM
Disabled (external
address area)
0
1
1
1
0
0
1
0
1
Enabled
1
1
0
1
1
1
Rev. 2.00, 09/03, page 573 of 890