Cypress CY7C1339G - Manual (Page 7)

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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