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CY7C027V-20AXC Datasheet(PDF) 9 Page - Cypress Semiconductor

Part # CY7C027V-20AXC
Description  3.3V 32K/64K x 16/18 Dual-Port Static RAM
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Manufacturer  CYPRESS [Cypress Semiconductor]
Direct Link  http://www.cypress.com
Logo CYPRESS - Cypress Semiconductor

CY7C027V-20AXC Datasheet(HTML) 9 Page - Cypress Semiconductor

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CY7C027V/027VN/027AV/028V
CY7C037V/037AV/038V
Document #: 38-06078 Rev. *B
Page 9 of 18
Switching Waveforms
Notes
15. R/W is HIGH for read cycles.
16. Device is continuously selected CE = VIL and UB or LB = VIL. This waveform cannot be used for semaphore reads.
17. OE = VIL.
18. Address valid prior to or coincident with CE transition LOW.
19. To access RAM, CE = VIL, UB or LB = VIL, SEM = VIH. To access semaphore, CE = VIH, SEM = VIL.
tRC
tAA
tOHA
DATA VALID
PREVIOUS DATA VALID
DATA OUT
ADDRESS
tOHA
Figure 4. Read Cycle No. 1 (Either Port Address Access)[15, 16, 17]
tACE
tLZOE
tDOE
tHZOE
tHZCE
DATA VALID
tLZCE
tPU
tPD
ISB
ICC
DATA OUT
OE
CE and
LB or UB
CURRENT
Figure 5. Read Cycle No. 2 (Either Port CE/OE Access)[15, 18, 19]
UB or LB
DATA OUT
tRC
ADDRESS
tAA
tOHA
CE
tLZCE
tABE
tHZCE
tHZCE
tACE
tLZCE
Figure 6. Read Cycle No. 3 (Either Port)[15, 17, 18, 19]
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