CY7C1339F
Document #: 38-05217 Rev. *C
Page 7 of 17
READ Cycle, Continue Burst
Next
X
X
X
L
H
H
L
H
H
L-H three-state
READ Cycle, Continue Burst
Next
H
X
X
L
X
H
L
H
L
L-H
Q
READ Cycle, Continue Burst
Next
H
X
X
L
X
H
L
H
H
L-H three-state
WRITE Cycle, Continue Burst
Next
X
X
X
L
H
H
L
L
X
L-H
D
WRITE Cycle, Continue Burst
Next
H
X
X
L
X
H
L
L
X
L-H
D
READ Cycle, Suspend Burst
Current
X
X
X
L
H
H
H
H
L
L-H
Q
READ Cycle, Suspend Burst
Current
X
X
X
L
H
H
H
H
H
L-H three-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 three-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
Partial Truth Table for Read/Write[2, 8]
Function
GW
BWE
BWD
BWC
BWB
BWA
Read
H
H
XXXX
Read
H
L
HHHH
Write Byte A – DQA
H
L
HHH
L
Write Byte B – DQB
HL
H
H
L
H
Write Bytes B, A
H
L
H
H
L
L
Write Byte C– DQC
HL
HL
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– DQD
H
L
L
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
H
LLLL
H
Write All Bytes
H
LLLLL
Write All Bytes
L
XXXXX
Notes:
8. Table only lists a partial listing of the byte write combinations. Any combination of BW[A:D] is valid. Appropriate write will be done based on which byte write is active.
Truth Table[ 2, 3, 4, 5, 6, 7]
Operation
Add. Used CE1 CE2 CE3 ZZ ADSP ADSC ADV WRITE OE CLK
DQ
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