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674
On-chip
ROM space
(area 0)
H'0000
H'1FFFF (128-kbyte version)
H'00000000
H'0001FFFF (128-kbyte version)
Address for MCU
modes 0, 1, 2, 3
Address for
PROM mode
Figure 21.5 On-Chip ROM Memory Map
21.3
PROM Programming
The PROM mode write/verify specifications are the same as those of the standard EPROM
HN27C101. However, because the page program format is not supported,
do not set the PROM
writer to the page programming mode. PROM writers that only support page programming mode
cannot be used. When selecting a PROM writer, confirm that it supports the byte-by-byte high-
speed, high-reliability programming format.
21.3.1
Programming Mode Selection
There are two on-chip PROM programming modes: write and verify (reads and confirms written
data). The mode is selected by using the pins (table 21.2).
Table 21.2
PROM Programming Mode Selection
Pin
Mode
CE
OE
PGM
V
PP
V
CC
I/O7–I/O0
A16–A0
Write
0
1
0
V
PP
V
CC
Data input
Address
Verify
0
0
1
Data output
input
Programming
0
0
0
High
Prohibited
0
1
1
impedance
1
0
0
1
1
1
Note:
0: low level, 1: high level, V
PP
: V
PP
level, V
CC
: V
CC
level.
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