a3p250l Actel Corporation, a3p250l Datasheet - Page 119

• Manufacturer Part Number: a3p250l
• Description: Proasic3l Low-power Flash Fpgas With Flash*freeze Technology
• Manufacturer: Actel Corporation

Figure 2-53 • FIFO FULL Flag and AFULL Flag Assertion
Figure 2-54 • FIFO EMPTY Flag and AEMPTY Flag Deassertion
(Address Counter)
Figure 2-55 • FIFO FULL Flag and AFULL Flag Deassertion
(Address Counter)
(Address Counter)
WA/RA
AEMPTY
WCLK
FULL
AFULL
WA/RA
EMPTY
RCLK
WCLK
WA/RA
RCLK
AFULL
WCLK
FULL
MATCH (FULL)
MATCH
(EMPTY)
NO MATCH
1st Rising
After 1st
Write
Edge
1st Rising
After 1st
Edge
Read
NO MATCH
NO MATCH
t
NO MATCH
2nd Rising
CYC
After 1st
Write
Edge
After 2nd
1st Rising
NO MATCH
Edge
Read
A dv a n c e v 0. 4
NO MATCH
t
RCKEF
t
WCKF
t
CKAF
NO MATCH
NO MATCH
Dist = AFF_TH
ProASIC3L DC and Switching Characteristics
NO MATCH
NO MATCH
t
WCKFF
t
CKAF
t
CKAF
Dist = AEF_TH + 1
MATCH (FULL)
Dist = AFF_TH – 1
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