CY7C29 データシートの表示（PDF） - Cypress Semiconductor

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CY7C29

256/512/1K/2K/4K x 9 Asynchronous FIFO

Cypress Semiconductor 

CY7C419/21/25/29/33

Switching Waveforms (continued)

Figure 7. Last Write to First Read Full Flag

ADDITIONAL

LAST WRITE

FIRST READ

READS

FIRST WRITE

R

W

tWFF

FF

tRFF

W

R

EF

DATA OUT

FL/RT

R,W

Figure 8. Last Read to First Write Empty Flag

LAST READ

FIRST WRITE

ADDITIONAL

WRITES

FIRST READ

tREF

tA

VALID

tWEF

Figure 9. Retransmit[13]

tRTC[14]

tPRT

VALID

tRTR

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.

Document #: 38-06001 Rev. *C

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