— 22 —
12-2. ROM (MB834000CPF-G-4EP)
Pin No.
Pin Name
Input / Output
Function
1
NC
I
Power supply
2~12,23,25~31,
A0~A18
I
Address input
13~15,17~21
D0~D7
O
Data output
16
VSS
I
Ground
22
CE
I
Chip enable input from CPU
24
OE
I
Output enable input from CPU
32
VCC
I
Power supply
Pin No.
Pin Name
Input / Output
Function
1~10,21,23~26,
A0~A14
I
Address input
11~13,15~19
IO1~IO8
I/O
Data input/output
14
GND
I
Ground
20
CS
I
Chip select signal
22
OE
I
Output enable input from CPU
27
WE
I
Write enable input
28
VCC
I
Power supply
12-3. RAM (256SRAM/3V)
