CY7C474 データシートの表示（PDF） - Cypress Semiconductor

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CY7C474

8K x 9 FIFO, 16K x 9 FIFO 32K x 9 FIFO with Programmable Flags

Cypress Semiconductor 

Switching Waveforms (Continued)

PAFE Flag (Almost Full)

W

R

PAFE

HF

LOW

tAFED

PAFE Flag (Almost Empty)

R

W

PAFE

tAFED

HF

HIGH

Retransmit[10]

tCY

W, R

CY7C470

CY7C472

CY7C474

tAFED

7C470–13

tAFED

7C470–14

tCY

RT

Q 0–Q8

FLAGS[10]

tRV

tPW

tA

tRV

tLZR

tCY

DATA VALID

FLAGS VALID

7C470–15

Note:

10. The flags may change state during retransmit, but they will be valid a tCY later, except for the CY7C47X–20 (Military), whose flags will be valid after tCY + 10 ns.

7

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