CY7C1441AV33
CY7C1443AV33,CY7C1447AV33
Document #: 38-05357 Rev. *G Page 11 of 31
Partial Truth Table for Read/Write
Function (CY7C1441AV33)[2, 7] GW BWE BWDBWCBWBBWA
Read HHXXXX
Read HL HHHH
Write Byte A (DQA, DQPA) HLHHHL
Write Byte B(DQB, DQPB)HLHHLH
Write Bytes A, B (DQA, DQB, DQPA, DQPB)H L H H L L
Write Byte C (DQC, DQPC)HLHLHH
Write Bytes C, A (DQC, DQA, DQPC, DQPA)H L H L H L
Write Bytes C, B (DQC, DQB, DQPC, DQPB)H L H L L H
Write Bytes C, B, A (DQC, DQB, DQA, DQPC,
DQPB, DQPA)HLHLLL
Write Byte D (DQD, DQPD) HLL HHH
Write Bytes D, A (DQD, DQA, DQPD, DQPA)H L L H H L
Write Bytes D, B (DQD, DQA, DQPD, DQPA)H L L H L H
Write Bytes D, B, A (DQD, DQB, DQA, DQPD,
DQPB, DQPA)HLLHLL
Write Bytes D, B (DQD, DQB, DQPD, DQPB)H L L L H H
Write Bytes D, B, A (DQD, DQC, DQA, DQPD,
DQPC, DQPA)HLLLHL
Write Bytes D, C, A (DQD, DQB, DQA, DQPD,
DQPB, DQPA)HLLLLH
Write All Bytes H L L L L L
Write All Bytes L XXXXX
Truth Table for Read/Write
Function (CY7C1443AV33)[2] GW BWE BWBBWA
Read H H X X
Read H L H H
Write Byte A - (DQA and DQPA)HLHL
Write Byte B - (DQB and DQPB)HLLH
Write All Bytes H L L L
Write All Bytes L X X X
Truth Table for Read/Write
Function (CY7C1447AV33)[2, 8] GW BWE BWX
Read H H X
Read H L All BW = H
Write Byte x – (DQx and DQPx)HLL
Write All Bytes H L All BW = L
Write All Bytes L X X
Notes
7. Table only lists a partial listing of the byte write combinations. Any Combination of BWX is valid Appropriate write is done based on which byte write is active.
8. BWx represents any byte write signal BW[A..H].To enable any byte write BWx, a Logic LOW signal should be applied at clock rise.Any number of bye writes can be
enabled at the same time for any given write.
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