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CY7C4201-25AI Datasheet(PDF) 10 Page - Cypress Semiconductor

Part # CY7C4201-25AI
Description  64/256/512/1K/2K/4K/8K x 9 Synchronous FIFOs
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Manufacturer  CYPRESS [Cypress Semiconductor]
Direct Link  http://www.cypress.com
Logo CYPRESS - Cypress Semiconductor

CY7C4201-25AI Datasheet(HTML) 10 Page - Cypress Semiconductor

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CY7C4421/4201/4211/4221
CY7C4231/4241/4251
Document #: 38-06016 Rev. *A
Page 10 of 18
Notes:
16. The clocks (RCLK, WCLK) can be free-running during reset.
17. Holding WEN2/LD HIGH during reset will make the pin act as a second enable pin. Holding WEN2/LD LOW during reset will make the pin act as a load enable
for the programmable flag offset registers.
18. After reset, the outputs will be LOW if OE = 0 and three-state if OE=1.
19. When tSKEW1 > minimum specification, tFRL (maximum) = tCLK + tSKEW1. When tSKEW1 < minimum specification, tFRL (maximum) = either 2*tCLK + tSKEW1 or
tCLK + tSKEW1. The Latency Timing applies only at the Empty Boundary (EF = LOW).
20. The first word is available the cycle after EF goes HIGH, always.
Switching Waveforms (continued)
D0(FIRSTVALIDWrite)
First Data Word Latency after Reset with Simultaneous Read and Write
tSKEW1
WEN1
WCLK
Q0 –Q8
EF
REN1,
REN2
OE
tOE
tENS
tOLZ
tDS
RCLK
tREF
tA
tFRL
D1
D2
D3
D4
D0
D1
D0–D8
tA
WEN2
(if applicable)
[19]
[20]
DATAWRITE2
DATAWRITE1
tENS
tSKEW1
DATA IN OUTPUT REGISTER
Empty Flag Timing
WEN1
WCLK
Q0 –Q8
EF
REN1,
REN2
OE
tDS
tENH
RCLK
tREF
tA
tFRL
D0 –D8
DATA Read
tSKEW1
tFRL
tREF
tDS
tENS
tENH
WEN2
(if applicable)
tREF
LOW
[19]
[19]
tENS
tENS
tENH
tENH


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