HD6435348R Hitachi Semiconductor, HD6435348R Datasheet - Page 321

• Manufacturer Part Number: HD6435348R
• Description: Single-Chip Microcomputer
• Manufacturer: Hitachi Semiconductor

17.3 H8/534 Programming
The write, verify, and inhibited sub-modes of the PROM mode are selected as shown in
table 17-4.
Table 17-4 Selection of Sub-Modes in PROM Mode (H8/534)
Mode
Write
Verify
Programming inhibited
Note: The V
The H8/534 PROM uses the same, standard read/write specifications as the HN27C256 and
HN27256.
17.3.1 Writing and Verifying
An efficient, high-speed programming procedure can be used to write and verify PROM data.
This procedure writes data quickly without subjecting the chip to voltage stress and without
sacrificing data reliability. It leaves the data H'FF written in unused addresses.
Address in
MCU mode
* In mode 2, H'EE80 to H'F67F are external addresses. Do not attempt to program these
H'7FFF
H'0000
addresses if the H8/536 will be used in mode 2.
PP
On-chip ROM
and V
H8/534
CC
pins must be held at the V
CE
Low
High
High
Figure 17-3 Memory Map in PROM Mode
Address in
PROM mode
H'7FFF
H'0000
OE
High
Low
High
V
V
V
V
PP
PP
PP
PP
308
V
V
V
V
PP
CC
CC
CC
CC
and V
Address in
MCU mode
H'EE80*
Pins
H'F67F
H'0000
CC
0
Data input
Data output
High-impedance
7
voltage levels.
to 0
0
On-chip ROM
H8/536
A
Address input
Address input
Address input
Address in
PROM mode
14
H'F67F
to A
H'0000
0