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| A3P1000-1FGG144M Datasheet, PDF (145/181 Pages) Actel Corporation – Military ProASIC3/EL Low-Power Flash FPGAs | |||
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Military ProASIC3/EL Low-Power Flash FPGAs
WCLK
FULL
AFULL
tCYC
tCKAF
tWCKFF
WA/RA
(Address Counter)
NO MATCH
NO MATCH
Figure 2-54 ⢠FIFO FULL Flag and AFULL Flag Assertion
Dist = AFF_TH
MATCH (FULL)
WCLK
WA/RA MATCH
(Address Counter) (EMPTY)
NO MATCH
NO MATCH
RCLK
1st Rising
Edge
After 1st
Write
2nd Rising
Edge
After 1st
Write
tRCKEF
EMPTY
NO MATCH
AEMPTY
NO MATCH
Dist = AEF_TH + 1
tCKAF
Figure 2-55 ⢠FIFO EMPTY Flag and AEMPTY Flag Deassertion
RCLK
WA/RA
(Address Counter)
WCLK
MATCH (FULL) NO MATCH
1st Rising
Edge
After 1st
Read
FULL
NO MATCH
1st Rising
Edge
After 2nd
Read
tWCKF
NO MATCH
AFULL
NO MATCH Dist = AFF_TH â 1
tCKAF
Figure 2-56 ⢠FIFO FULL Flag and AFULL Flag Deassertion
v1.0
2 -133
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