CMOS 1024 × 9 Asynchronous FIFO
TIMING DIAGRAMS (cont’d)
LH540202
HALF-FULL
OR LESS
W
R
HF
MORE THAN
HALF-FULL
HALF-FULL
OR LESS
t WHF
tRHF
Figure 18. Half-Full Flag Timing
tRT
RT
tRTR
R,W
NOTES:
1. tRTC = tRT + tRTR
2. FF, HF and EF may change state during retransmit, but they will become valid by tRTC.
Figure 19. Retransmit Timing
540202-12
540202-13
15