R
Virtex™-II Platform FPGAs: DC and Switching Characteristics
Clock Distribution Switching Characteristics
Table 19: Clock Distribution Switching Characteristics
Speed Grade
Description
Symbol
–6
–5
–4
Units
0.47
0.52
0.59
Global Clock Buffer I input to O output
T
ns, Max
GIO
CLB Switching Characteristics
Delays originating at F/G inputs vary slightly according to the input used (see Figure 16 in Module 2). The values listed below
are worst-case. Precise values are provided by the timing analyzer.
Table 20: CLB Switching Characteristics
Speed Grade
Description
Combinatorial Delays
Symbol
–6
–5
–4
Units
0.35
0.57
0.76
0.36
0.26
0.26
0.35
0.41
0.39
0.63
0.83
0.39
0.28
0.28
0.38
0.45
0.44
0.72
0.95
0.45
0.32
0.32
0.44
0.51
4-input function: F/G inputs to X/Y outputs
5-input function: F/G inputs to F5 output
5-input function: F/G inputs to X output
FXINA or FXINB inputs to Y output via MUXFX
FXINA input to FX output via MUXFX
FXINB input to FX output via MUXFX
SOPIN input to SOPOUT output via ORCY
T
ns, Max
ns, Max
ns, Max
ns, Max
ns, Max
ns, Max
ns, Max
ILO
T
IF5
T
IF5X
IFXY
T
T
T
INAFX
INBFX
T
SOPSOP
Incremental delay routing through transparent latch
to XQ/YQ outputs
T
ns, Max
IFNCTL
Sequential Delays
0.45
0.54
0.50
0.59
0.57
0.68
FF Clock CLK to XQ/YQ outputs
Latch Clock CLK to XQ/YQ outputs
Setup and Hold Times Before/After Clock CLK
BX/BY inputs
T
ns, Max
ns, Max
CKO
T
CKLO
0.30/–0.07
0.30/–0.07
0.30/–0.07
0.19/–0.06
0.21/–0.02
0.33/–0.08
0.33/–0.08
0.33/–0.08
0.21/–0.07
0.23/–0.03
0.37/–0.09
0.37/–0.09
0.37/–0.09
0.24/–0.08
0.26/–0.03
T
/T
ns, Min
ns, Min
ns, Min
ns, Min
ns, Min
DICK CKDI
DY inputs
T
/T
DYCK CKDY
DX inputs
T
T
T
/T
DXCK CKDX
CE input
/T
CECK CKCE
SR/BY inputs (synchronous)
Clock CLK
T
SRCK/ SCKR
0.61
0.61
0.67
0.67
0.77
0.77
Minimum Pulse Width, High
Minimum Pulse Width, Low
Set/Reset
T
ns, Min
ns, Min
CH
T
CL
0.61
1.06
0.67
1.17
0.77
1.34
Minimum Pulse Width, SR/BY inputs
T
ns, Min
ns, Max
MHz
RPW
Delay from SR/BY inputs to XQ/YQ outputs
(asynchronous)
T
RQ
820
750
650
Toggle Frequency (MHz) (for export control)
F
TOG
DS031-3 (v3.0) August 1, 2003
Product Specification
www.xilinx.com
1-800-255-7778
Module 3 of 4
19
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