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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 CE
1
CE
2
CE
3
ZZ ADSP ADSC ADV WRITE OE CLK DQ
Truth Table for Read/Write
[4,8,9]
Function (CY7C1440AV33) 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
[4, 8, 9]
Function (CY7C1442AV33) 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
Notes:
8. BW
x
represents any byte write signal. To enable any byte write BW
x
, 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 BW
X
is valid. Appropriate write will be done based on which byte write is active.
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