Cypress CY7C1440AV33, CY7C1442AV33, CY7C1446AV33 Truth Table, Truth Table for Read/Write

CY7C1440AV33
CY7C1442AV33
CY7C1446AV33
Document #: 38-05383 Rev. *E Page 10 of 31
READ Cycle, Suspend Burst Current X X X L H H H H H L-H Tri-State
READ Cycle, Suspend Burst Current H X X L X H H H L L-H Q
READ Cycle, Suspend Burst Current H X X L X H H H H L-H Tri-State
WRITE Cycle, Suspend Burst Current X X X L H H H L X L-H D
WRITE Cycle, Suspend Burst Current H X X L X H H L X L-H D
Truth Table (continued)[2, 3, 4, 5, 6, 7]
Operation Add. Used CE1CE2CE3ZZ ADSP ADSC ADV WRITE OE CLK DQ
Truth Table for Read/Write[4,8,9]
Function (CY7C1440AV33) GW BWE BWDBWCBWBBWA
Read HHXXXX
Read HL HHHH
Write Byte A – (DQA and DQPA) HL HHHL
Write Byte B – (DQB and DQPB)HLHHLH
Write Bytes B, A H L H H L L
Write Byte C – (D QC and DQPC) 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 – (D QD and DQPD) HLL HHH
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[4, 8, 9]
Function (CY7C1442AV33) 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 Bytes B, A H L L L
Write All Bytes H L L L
Write All Bytes L X X X
Notes:
8. BWx represents any byte write signal. 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.
9. Table only lists a partial listing of the byte write combinations. Any combination of BWX is valid. Appropriate write will be done based on which byte write is active.
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