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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