Virtex-6 FPGA Data Sheet: DC and Switching Characteristics
CLB Distributed RAM Switching Characteristics (SLICEM Only)
Table 55: CLB Distributed RAM Switching Characteristics
Symbol
Description
-3
Speed Grade
-2 -1
-1L
Units
Sequential Delays
T SHCKO
T SHCKO_1
Clock to A – B outputs
Clock to AMUX – BMUX outputs
0.92
1.19
1.10
1.40
1.36
1.71
1.49
1.87
ns, Max
ns, Max
Setup and Hold Times Before/After Clock CLK
T DS /T DH
T AS /T AH
T WS /T WH
T CECK /T CKCE
A – D inputs to CLK
Address An inputs to clock
WE input to clock
CE input to CLK
0.62/0.18
0.19/0.52
0.27/0.00
0.28/–0.01
0.72/0.20
0.22/0.59
0.32/0.00
0.34/–0.01
0.88/0.22
0.27/0.66
0.40/0.00
0.41/–0.01
0.98/0.23
0.30/0.75
0.47/–0.03
0.48/–0.05
ns, Min
ns, Min
ns, Min
ns, Min
Clock CLK
T MPW
T MCP
Minimum pulse width
Minimum clock period
0.70
1.40
0.82
1.64
1.00
2.00
1.04
2.08
ns, Min
ns, Min
Notes:
1.
2.
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 SHCKO also represents the CLK to XMUX output. Refer to TRACE report for the CLK to XMUX path.
CLB Shift Register Switching Characteristics (SLICEM Only)
Table 56: CLB Shift Register Switching Characteristics
Symbol
Description
-3
Speed Grade
-2 -1
-1L
Units
Sequential Delays
T REG
T REG_MUX
T REG_M31
Clock to A – D outputs
Clock to AMUX – DMUX output
Clock to DMUX output via M31 output
1.11
1.37
1.08
1.30
1.60
1.27
1.58
1.93
1.55
1.74
2.12
1.74
ns, Max
ns, Max
ns, Max
Setup and Hold Times Before/After Clock CLK
T WS /T WH
WE input
0.05/0.00
0.07/0.00
0.09/0.00
0.11/0.03
ns, Min
T CECK /T CKCE
CE input to CLK
0.06/–0.01 0.08/–0.01 0.10/–0.01
0.12/0.02
ns, Min
T DS /T DH
A – D inputs to CLK
0.64/0.18
0.76/0.21
0.94/0.24
1.07/0.23
ns, Min
Clock CLK
T MPW
Minimum pulse width
0.60
0.70
0.85
0.89
ns, Min
Notes:
1.
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.
DS152 (v3.6) March 18, 2014
Product Specification
43
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