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MSM518121A
PIN CONFIGURATION (TOP VIEW)
SC
SIO1
1
2
3
4
5
6
7
8
9
40 VSS1
39 SIO8
38 SIO7
37 SIO6
36 SIO5
35 SE
W5/IO5
W7/IO7
SE
1
3
5
7
9
2
W6/IO6
W8/IO8
SIO5
SIO7
VSS1
SIO1
SIO3
DT/OE
W2/IO2
NC
4
SIO2
6
SIO3
SIO6
8
SIO4
SIO8
10
12
14
16
18
20
22
24
26
28
30
32
34
36
38
40
DT/OE
W1/IO1
W2/IO2
W3/IO3
SC 11
SIO2 13
SIO4 15
W1/IO1 17
W3/IO3 19
W4/IO4 21
WB/WE 23
A8 25
34 W8/IO8
33 W7/IO7
32 W6/IO6
31 W5/IO5
30 VSS2
29 NC
W4/IO4 10
VCC1 11
WB/WE 12
NC 13
VCC1
RAS
A6
28 NC
RAS 14
NC 15
27 CAS
26 NC
VSS2 27
NC
A5 29
A4
A8 16
25 A0
NC 31
VCC2
A3
17
18
19
20
24
23
22
21
A6
A5
A1
A2
A3
A7
33
35
37
39
A7
A2
A1
A4
A0
NC
VCC2
CAS
NC
40-Pin Plastic ZIP
40-Pin Plastic SOJ
Pin Name
A0 - A8
RAS
Function
Address Input
Row Address Strobe
CAS
Column Address Strobe
Data Transfer / Output Enable
Write per Bit / Write Enable
DT / OE
WB / WE
W1/IO1 - W8/IO8 Write Mask / Data IN, OUT
SC
SE
Serial Clock
Serial Enable
SIO1 - SIO8
Serial Input / Output
V
CC / VSS
Power Supply (5 V) / Ground (0 V)
No Connection
NC
Note:
ThesamepowersupplyvoltagemustbeprovidedtoeveryV pin,andthesameGND
CC
voltage level must be provided to every V pin.
SS
2/33
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