Section 18 H8/3064 Internal Voltage Step-Down Version Rom; H8/3064 Mask Rom B-Mask Version]; Overview; Table 18.1 Operating Modes And Rom - Hitachi H8/3062 Hardware Manual

Section 18 H8/3064 Internal Voltage
[H8/3064F-ZTAT B-Mask Version, H8/3064 Mask ROM B-Mask Version]
18.1

Overview

The H8/3064F-ZTAT B-mask version has 256 kbytes of on-chip flash memory. The H8/3064
mask ROM B-mask version has 256 kbytes of on-chip mask ROM. 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 (MD
table 18.1.
The on-chip flash memory product (H8/3064F-ZTAT B-mask version) 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)
Step-Down Version ROM
to MD
2
Mode Pins
MD2 MD1 MD0
0 0 1
0 1 0
0 1 1
1 0 0
1 0 1
1 1 0
1 1 1
) as shown in
0
On-Chip ROM
Disabled (external
address area)
Enabled
523