CHAPTER 7 HARDWARE SPECIFICATIONS
User's Manual U13502EJ2V0UM00
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Supported ROM specifications
Only an EPROM with 32 or fewer pins and the pin configuration shown below can be used as the master ROM.
When the master ROM is accessed, the signature of the PROM is read to check whether the PROM is
supported. If the signature cannot be correctly read, replace the PROM with a compatible PROM of another
make.
An attempt to download a program from the master ROM socket by using a product other than a PROM and a jig
may damage the ROM socket. Never make such an attempt.
The following is pin configuration.
Figure 7-1. Pin Configuration (Top View)
V
CC
V
SS
D2
D1
D0
A0
A1
A2
A3
A4
A5
A6
A7
A12
A15
A16
A19
A18
A17
A14
A13
A8
A9
A11
_OE
A10
_CE
D7
D6
D5
D4
D3
Table 7-2. Pin List
Pin
Signal name
Pin
Signal name
Pin
Signal name
Pin
Signal name
1
A19
Note
9
A3
17
D3
25
A11
2
A16
10
A2
18
D4
26
A9
3
A15
11
A1
19
D5
27
A8
4
A12
12
A0
20
D6
28
A13
5
A7
13
D0
21
D7
29
A14
6
A6
14
D1
22
_CE
30
A17
7
A5
15
D2
23
A10
31
A18
Note
8
A4
16
V
SS
(GND)
24
_OE
32
V
CC
Note
The pin list shown in Table 7-2 is for a 1-Mbyte model. A19 and A18 of the 512-Kbyte and 256-Kbyte
models are NC.
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