Cypress CY7C1347G User Manual
Page 8
CY7C1347G
Document #: 38-05516 Rev. *F
Page 8 of 22
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 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
Table 5. Truth Table
[2, 3, 4, 5, 6]
(continued)
Next Cycle
Add.
Used
CE
1
CE
2
CE
3
ZZ
ADSP ADSC ADV WRITE
OE
CLK
DQ
Table 6. Partial Truth Table for Read/Write
Function
GW
BWE
BW
D
BW
C
BW
B
BW
A
Read
H
H
X
X
X
X
Read
H
L
H
H
H
H
Write Byte A – DQ
A
H
L
H
H
H
L
Write Byte B – DQ
B
H
L
H
H
L
H
Write Bytes B, A
H
L
H
H
L
L
Write Byte C– DQ
C
H
L
H
L
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– DQ
D
H
L
L
H
H
H
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
L
L
L
L
H
Write All Bytes
H
L
L
L
L
L
Write All Bytes
L
X
X
X
X
X
Note
7. This table is only a partial listing of the byte write combinations. Any combination of BW
x
is valid. Appropriate write is based on which byte write is active.