CY7C09269V/79V/89V
CY7C09369V/79V/89V
Switching Waveforms
(continued)
Bank Select Pipelined Read
[20,
21]
t
CH2
CLK
L
t
SA
ADDRESS
(B1)
t
SC
CE
0(B1)
t
CD2
DATA
OUT(B1)
t
SA
ADDRESS
(B2)
A
0
t
HA
A
1
t
SC
CE
0(B2)
t
SC
DATA
OUT(B2)
t
CKLZ
t
HC
t
CD2
D
2
t
CKLZ
t
CKHZ
t
CD2
D
4
t
SC
D
0
t
DC
A
2
t
HC
t
HC
t
CD2
D
1
t
DC
A
3
A
4
t
CKLZ
A
5
t
CKHZ
t
CD2
D
3
t
CKHZ
A
0
t
HC
t
HA
A
1
A
2
A
3
A
4
A
5
t
CYC2
t
CL2
Left Port Write to Flow-Through Right Port Read
[22,
23, 24, 25]
CLK
L
t
SW
R/W
L
t
SA
ADDRESS
L
t
SD
DATA
INL
CLK
R
R/W
R
ADDRESS
R
t
SW
t
SA
t
HW
t
HA
NO
MATCH
t
CWDD
DATA
OUTR
t
DC
VALID
t
DC
t
CD1
VALID
VALID
t
CCS
t
CD1
MATCH
t
HD
t
HA
NO
MATCH
t
HW
MATCH
Notes:
20. In this depth expansion example, B1 represents Bank #1 and B2 is Bank #2; Each Bank consists of one Cypress dual-port device from this datasheet.
ADDRESS
(B1)
= ADDRESS
(B2)
.
21. UB, LB, OE and ADS = V
IL
; CE
1(B1)
, CE
1(B2)
, R/W, CNTEN, and CNTRST = V
IH
.
22. The same waveforms apply for a right port write to flow-through left port read.
23. CE
0
, UB, LB, and ADS = V
IL
; CE
1
, CNTEN, and CNTRST = V
IH
.
24. OE = V
IL
for the Right Port, which is being read from. OE = V
IH
for the Left Port, which is being written to.
25. It t
CCS
≤
maximum specified, then data from right port READ is not valid until the maximum specified for t
CWDD
. If t
CCS
>maximum specified, then data is not valid
until t
CCS
+ t
CD1
. t
CWDD
does not apply in this case.
Document #: 38-06056 Rev. **
Page 9 of 19
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