CY62256VNLL CYPRESS [Cypress Semiconductor], CY62256VNLL Datasheet - Page 7
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CY62256VNLL
Manufacturer Part Number
CY62256VNLL
Description
Manufacturer
CYPRESS [Cypress Semiconductor]
Datasheet
1.CY62256VNLL.pdf
(14 pages)
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Switching Waveforms
Notes
Document Number: 001-06512 Rev. *D
14. Device is continuously selected. OE, CE = V
15. WE is HIGH for read cycle.
16. Address valid prior to or coincident with CE transition LOW.
17. The internal write time of the memory is defined by the overlap of CE LOW and WE LOW. Both signals must be LOW to initiate a write and either signal can
18. Data I/O is high impedance if OE = V
19. If CE goes HIGH simultaneously with WE HIGH, the output remains in a high impedance state.
20. During this period, the I/Os are in output state and input signals should not be applied.
DATA OUT
ADDRESS
DATA OUT
CURRENT
ADDRESS
terminate a write by going HIGH. The data input set-up and hold timing should be referenced to the rising edge of the signal that terminates the write.
DATA I/O
SUPPLY
V
WE
OE
CE
OE
CE
CC
NOTE 20
PREVIOUS DATA VALID
HIGH IMPEDANCE
t
PU
t
IH
LZCE
t
SA
.
t
HZOE
Figure 5. Write Cycle No. 1 (WE Controlled)
t
t
ACE
LZOE
IL
.
t
OHA
50%
t
DOE
Figure 3. Read Cycle No. 1
Figure 4. Read Cycle No. 2
t
AA
t
AW
t
RC
t
WC
t
RC
DATA
t
t
PWE
SD
IN
[14, 15]
[15, 16]
VALID
DATA VALID
[17, 18, 19]
DATA VALID
t
HA
t
HD
t
t
HZOE
HZCE
t
PD
50%
CY62256VN
IMPEDANCE
HIGH
Page 7 of 14
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