Cypress CY7C1354CV25 User Manual
Page 9
CY7C1354CV25
CY7C1356CV25
Document #: 38-05537 Rev. *H
Page 9 of 28
NOP/WRITE ABORT (Begin Burst)
None
L
L
L
L
H
X
L
L-H
Tri-State
WRITE ABORT (Continue Burst)
Next
X
L
H
X
H
X
L
L-H
Tri-State
IGNORE CLOCK EDGE (Stall)
Current
X
L
X
X
X
X
H
L-H
–
SLEEP MODE
None
X
H
X
X
X
X
X
X
Tri-State
Partial Write Cycle Description
[2, 3, 4, 9]
Function (CY7C1354CV25)
WE
BW
d
BW
c
BW
b
BW
a
Read
H
X
X
X
X
Write
–No bytes written
L
H
H
H
H
Write Byte a–
(DQ
a
and DQP
a)
L
H
H
H
L
Write Byte b – (DQ
b
and
DQP
b)
L
H
H
L
H
Write Bytes b, a
L
H
H
L
L
Write Byte c –
(DQ
c
and DQP
c)
L
H
L
H
H
Write Bytes c, a
L
H
L
H
L
Write Bytes c, b
L
H
L
L
H
Write Bytes c, b, a
L
H
L
L
L
Write Byte d –
(DQ
d
and DQP
d)
L
L
H
H
H
Write Bytes d, a
L
L
H
H
L
Write Bytes d, b
L
L
H
L
H
Write Bytes d, b, a
L
L
H
L
L
Write Bytes d, c
L
L
L
H
H
Write Bytes d, c, a
L
L
L
H
L
Write Bytes d, c, b
L
L
L
L
H
Write All Bytes
L
L
L
L
L
Partial Write Cycle Description
[2, 3, 4, 9]
Function (CY7C1356CV25)
WE
BW
b
BW
a
Read
H
x
x
Write – No Bytes Written
L
H
H
Write Byte a
− (DQ
a
and
DQP
a)
L
H
L
Write Byte b – (DQ
b
and DQP
b)
L
L
H
Write Both Bytes
L
L
L
Note:
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.
Truth Table
[2, 3, 4, 5, 6, 7, 8]
Operation
Address
Used
CE
ZZ
ADV/LD
WE
BWx
OE
CEN
CLK
DQ