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CY7C421-30JC Datasheet(PDF) 9 Page - Cypress Semiconductor

Part # CY7C421-30JC
Description  256/512/1K/2K/4K x 9 Asynchronous FIFO
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Manufacturer  CYPRESS [Cypress Semiconductor]
Direct Link  http://www.cypress.com
Logo CYPRESS - Cypress Semiconductor

CY7C421-30JC Datasheet(HTML) 9 Page - Cypress Semiconductor

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CY7C419/21/25/29/33
Document #: 38-06001 Rev. *A
Page 9 of 22
Notes:
13. EF, HF and FF may change state during retransmit as a result of the offset of the read and write pointers, but flags will be valid at tRTC.
14. tRTC = tPRT + tRTR.
Switching Waveforms (continued)
Last Write to First Read Full Flag
Last Read to First Write Empty Flag
C420–12
C420–13
C420–14
LAST WRITE
FIRST READ
ADDITIONAL
READS
FIRST WRITE
VALID
LAST READ
FIRST WRITE
ADDITIONAL
WRITES
FIRST READ
VALID
tREF
tWEF
tRTC
tPRT
tRTR
tWFF
tRFF
tA
W
R
EF
R
W
FF
DATA OUT
FL/RT
R,W
Retransmit[13]
[14]


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