CY7C4255, CY7C4265, CY7C4265A
Switching Waveforms (continued)
Figure 9. Half-Full Flag Timing
WCLK
WEN
HF
RCLK
REN
tCLKH
tCLKL
tENS tENH
tHF
HALF FULL OR LESS
HALF FULL + 1
OR MORE
tHF
tENS
HALF FULLOR LESS
WCLK
WEN
PAE [21]
RCLK
REN
Figure 10. Programmable Almost Empty Flag Timing
tCLKH
tCLKL
tENS tENH
tPAE
N + 1 WORDS
IN FIFO
tPAE
tENS
n WORDS IN FIFO
Note
21. PAE is offset = n. Number of data words into FIFO already = n.
Document #: 38-06004 Rev. *E
Page 10 of 23
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