CY7C460A 데이터 시트보기 (PDF) - Cypress Semiconductor

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CY7C460A

Asynchronous, Cascadable 8K/16K/32K/64K x9 FIFOs

Cypress Semiconductor 

Switching Waveforms[7] (continued)

Last Write to First Read Full Flag

LAST WRITE

R

W

tWFF

FF

FIRST READ

tRFF

CY7C460A/CY7C462A

CY7C464A/CY7C466A

ADDITIONAL

READS

FIRST WRITE

C460A–10

Last READ to First WRITE Empty Flag

LAST READ

W

R

EF

DATA OUT

tREF

tA

VALID

FIRST WRITE

ADDITIONAL

WRITES

FIRST READ

tWEF

VALID

Retransmit [11,12]

FL/RT

tPRT

tRTC

C460A–11

R,W

tRTR

tRTC

tRTR

C460A–12

Notes:

11. tRTC = tPRT + tRTR.

12. 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, except for the

CY7C46x-20 (Military), whose flags will be valid after tRTC + 10 ns.

Document #: 38-06011 Rev. *A

Page 6 of 15

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