Axcelerator Family FPGAs
2- 86
v2.8
Figure 2-68 FIFO Read Timing
Table 2-97 One FIFO Block
Worst-Case Commercial Conditions VCCA = 1.425V, VCCI = 3.0V, TJ = 70°C
'–2' Speed
'–1' Speed
'Std' Speed
Parameter
Description
Min.
Max.
Min.
Max.
Min.
Max.
Units
FIFO Module Timing
tWSU
Write Setup
1.08
1.23
1.45
ns
tWHD
Write Hold
0.22
0.25
0.30
ns
tWCKH
WCLK High
0.98
1.11
1.31
ns
tWCKL
WCLK Low
1.15
1.30
1.53
ns
tWCKP
Minimum WCLK Period
2.3
2.6
3.06
ns
tRSU
Read Setup
0.81
0.92
1.08
ns
tRHD
Read Hold
0.00
ns
tRCKH
RCLK High
1.00
1.14
1.34
ns
tRCKL
RCLK Low
1.21
1.38
1.62
ns
tRCKP
Minimum RCLK period
2.42
2.76
3.24
ns
tCLRHF
Clear High
1.08
1.23
1.45
ns
tCLR2FF
Clear-to-flag (EMPTY/FULL)
2.02
2.3
2.7
ns
tCLR2AF
Clear-to-flag (AEMPTY/AFULL)
4.62
5.26
6.19
ns
tCK2FF
Clock-to-flag (EMPTY/FULL)
2.24
2.55
3
ns
tCK2AF
Clock-to-flag (AEMPTY/AFULL)
5.31
6.05
7.11
ns
tRCK2RD1
RCLK-To-OUT (Pipelined)
1.39
1.59
1.86
ns
tRCK2RD2
RCLK-To-OUT (Non-Pipelined)
2.62
2.98
3.5
ns
RCLK
CLR
tRCKP
tRSU
tRHD
tRCK2RD1
tRCK2RD2
tCK2xF
tCLR2xF
tCLRHF
tRCKH
tRCKL
FREN
EMPTY, AEMPTY, AFULL, FULL
RD <35:0>