CY7C1339G
Document #: 38-05520 Rev. *F
Page 7 of 18
Partial Truth Table for Read/Write
[2, 8]
Function
GW
BWE
BW
D
BW
C
BW
B
BW
A
Read
H
H
X
X
X
X
Read
H
L
H
H
H
H
Write Byte A – DQ
A
H
L
H
H
H
L
Write Byte B – DQ
B
H
L
H
H
L
H
Write Bytes B, A
H
L
H
H
L
L
Write Byte C– DQ
C
H
L
H
L
H
H
Write Bytes C, A
H
L
H
L
H
L
Write Bytes C, B
H
L
H
L
L
H
Write Bytes C, B, A
H
L
H
L
L
L
Write Byte D– DQ
D
H
L
L
H
H
H
Write Bytes D, A
H
L
L
H
H
L
Write Bytes D, B
H
L
L
H
L
H
Write Bytes D, B, A
H
L
L
H
L
L
Write Bytes D, C
H
L
L
L
H
H
Write Bytes D, C, A
H
L
L
L
H
L
Write Bytes D, C, B
H
L
L
L
L
H
Write All Bytes
H
L
L
L
L
L
Write All Bytes
L
X
X
X
X
X
Note:
8.Table only lists a partial listing of the byte write combinations. Any combination of BW
X
is valid. Appropriate write will be done based on which byte write is active.
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