XC4VFX20 XILINX [Xilinx, Inc], XC4VFX20 Datasheet - Page 33

• Manufacturer Part Number: XC4VFX20
• Description: DC and Switching Characteristics
• Manufacturer: XILINX [Xilinx, Inc]

Table 41: FIFO Switching Characteristics
DS302 (v3.2) April 10, 2008
Product Specification
Notes:
1.
2.
3.
4.
5.
6.
7.
Sequential Delays
Setup and Hold Times Before Clock CLK
Reset Delays
Maximum Frequency
T
T
T
T
T
T
F
A Zero “0” Hold Time listing indicates no hold time or a negative hold time. Negative values cannot be guaranteed “best-case,” but if a “0” is listed,
there is no positive hold time.
T
T
T
T
T
T
FCKO_DO
FCKO_FLAGS
FCKO_POINTERS
FDCK_DI
FCCK_EN
FCO_FLAGS
MAX
FCKO_DO
FCKO_FLAGS
FCKO_POINTERS
FDCK_DI
FCCK_EN
FCO_FLAGS
Symbol
R
/
includes parity inputs (T
/
includes both WRITE and READ enable.
includes parity output (T
T
T
FCKD_DI
includes the following flags: AEMPTY, AFULL, EMPTY, FULL, RDERR, WRERR, RDCOUNT and WRCOUNT.
FCKC_EN
includes the following parameters: T
includes both T
FCKO_RDCOUNT
FDCK_DIP
Clock CLK to DO output
Clock CLK to FIFO flags outputs
Clock CLK to FIFO pointer outputs
DI input
Enable inputs
Reset RST to FLAGS
FIFO in all modes
FCKO_DOP
).
(5)
).
and T
FCKO_AEMPTY
(6)
FCKO_WRCOUNT.
Description
(7)
(2)
www.xilinx.com
, T
FCKO_AFULL
Virtex-4 FPGA Data Sheet: DC and Switching Characteristics
(3)
(4)
, T
FCKO_EMPTY
, T
FCKO_FULL
500.00
0.72
0.93
1.16
0.18
0.26
0.66
0.26
1.32
-12
, T
Speed Grade
FCKO_RDERR
450.45
0.80
1.04
1.29
0.20
0.28
0.73
0.28
1.46
-11
, T
400.00
FCKO_WRERR.
0.92
1.19
1.48
0.23
0.33
0.84
0.33
1.68
-10
ns, Max
ns, Max
ns, Max
ns, Max
ns, Min
ns, Min
Units
MHz
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