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CY7C421 Datasheet(PDF) 10 Page - Cypress Semiconductor

Part # CY7C421
Description  512 횞 9 Asynchronous FIFO
Download  21 Pages
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Manufacturer  CYPRESS [Cypress Semiconductor]
Direct Link  http://www.cypress.com
Logo CYPRESS - Cypress Semiconductor

CY7C421 Datasheet(HTML) 10 Page - Cypress Semiconductor

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CY7C421
Document Number: 38-06001 Rev. *H
Page 10 of 21
Figure 8. Last Write to First Read Full Flag
Figure 9. Last Read to First Write Empty Flag
Figure 10. Retransmit [11]
Switching Waveforms (continued)
LAST WRITE
FIRST READ
ADDITIONAL
READS
FIRST WRITE
tWFF
tRFF
R
W
FF
VALID
LAST READ
FIRST WRITE
ADDITIONAL
WRITES
FIRST READ
VALID
tREF
tWEF
tA
W
R
EF
Q0–Q8
tRTC
tPRT
tRTR
FL/RT
R,W
[12]
Notes
11. EF, HF and FF may change state during retransmit as a result of the offset of the read and write pointers, but flags are valid at tRTC.
12. tRTC = tPRT + tRTR.


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