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CY7C1380DV25, CY7C1380FV25
CY7C1382DV25, CY7C1382FV25
Document #: 38-05546 Rev. *E Page 10 of 29
Truth Table for Read/Write
[6, 9]
Function (CY7C1380DV25/CY7C1380FV25) GW BWE BW
D
BW
C
BW
B
BW
A
Read HHXXXX
Read HLHHHH
Write Byte A – (DQ
A
and DQP
A
) HLHHHL
Write Byte B – (DQ
B
and DQP
B
)HLHHLH
Write Bytes B, A H L H H L L
Write Byte C – (DQ
C
and DQP
C
) HLHLHH
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
and DQP
D
) HL LHHH
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 HLLLLH
Write All Bytes HLLLLL
Write All Bytes LXXXXX
Truth Table for Read/Write
[6, 9]
Function (CY7C1382DV25/CY7C1382FV25) GW BWE BW
B
BW
A
Read H H X X
Read H L H H
Write Byte A – (DQ
A
and DQP
A
)HLHL
Write Byte B – (DQ
B
and DQP
B
) HLLH
Write Bytes B, A H L L L
Write All Bytes H L L L
Write All Bytes L X X X
Note:
9. 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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