Cypress CY7C140 - Manual (Page 9)

CY7C130, CY7C130A
CY7C131, CY7C131A
CY7C140, CY7C141
Document #: 38-06002 Rev. *E Page 9 of 19
Switching Waveforms
Figure 5. Read Cycle No. 1 [20, 21]
Figure 6. Read Cycle No. 2 [20, 22]
Figure 7. Read Cycle No. 3
[21]
Notes
20. R/W is HIGH for read cycle.
21. Device is continuously selected, CE = V
IL
and OE = V
IL
.
22. Address valid prior to or coincident with CE transition LOW.
t
RC
t
AA
t
OHA
DATA VALID PREVIOUS DATA VALID DATA OUT
ADDRESS
Either Port Address Access
t
ACE
t
LZOE
t
DOE
t
HZOE
t
HZCE
DATA VALID DATA OUT
CE
OE
t
LZCE
t
PU
I
CC
I
SB
t
PD
Either Port CE/OE Access
t
BHA
t
BDD
VALID
t
DDD
t
WDD
ADDRESS MATCH
ADDRESS MATCH
R/W
R
ADDRESS
R
D
INR
ADDRESS
L
BUSY
L
DOUT
L
t
PS
t
BLA
Read with BUSY, Master: CY7C130 and CY7C131
t
RC
t
PWE
VALID
t
HD
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