Casio TE-2200 Service Manual page 29

4-9. SRAM (US only, IC14, 15: M68AF128BM70MC6U)
4-9-1. Pin Assignment
V CC
17
A0-A16
W
E1
E2
G
V SS
4-9-3. Block Diagram
E1
E2
W
G
4-9-2. Pin Function
8
DQ0-DQ7
A16
A7
DQ7
DQ0
— 27 —
A0-A16 Address Inputs
DQ0-DQ7 Data Input/Output
E1, E2 Chip Enable
G Output Enable
W Write Enable
V
Supply Voltage
CC
V
Ground
SS
MEMORY
ROW
DECODER ARRAY
I/O CIRCUITS
COLUMN
DECODER
A0 A6
V CC
V SS