xa3s100e Xilinx Corp., xa3s100e Datasheet - Page 22

• Manufacturer Part Number: xa3s100e
• Description: Xa Spartan-3e Automotive Fpga Family Data Sheet
• Manufacturer: Xilinx Corp.

Clock Buffer/Multiplexer Switching Characteristics
Table 24: Clock Distribution Switching Characteristics
18 x 18 Embedded Multiplier Timing
Table 25: 18 x 18 Embedded Multiplier Timing
DS635 (v1.1) January 20, 2009
Product Specification
Global clock buffer (BUFG, BUFGMUX, BUFGCE) I input to O-output
delay
Global clock multiplexer (BUFGMUX) select S-input setup to I0 and I1
inputs. Same as BUFGCE enable CE-input
Frequency of signals distributed on global buffers (all sides)
Combinatorial Delay
T
Clock-to-Output Times
T
T
T
Setup Times
T
T
T
Hold Times
T
T
T
MULT
MSCKP_P
MSCKP_A
MSCKP_B
MSDCK_P
MSDCK_A
MSDCK_B
MSCKD_P
MSCKD_A
MSCKD_B
Symbol
R
Combinatorial multiplier propagation delay from the A and B inputs to
the P outputs, assuming 18-bit inputs and a 36-bit product (AREG,
BREG, and PREG registers unused)
Clock-to-output delay from the active transition of the CLK input to valid
data appearing on the P outputs when using the PREG register
Clock-to-output delay from the active transition of the CLK input to valid
data appearing on the P outputs when using either the AREG or BREG
register
Data setup time at the A or B input before the active transition at the
CLK when using only the PREG output register (AREG, BREG
registers unused)
Data setup time at the A input before the active transition at the CLK
when using the AREG input register
Data setup time at the B input before the active transition at the CLK
when using the BREG input register
Data hold time at the A or B input before the active transition at the CLK
when using only the PREG output register (AREG, BREG registers
unused)
Data hold time at the A input before the active transition at the CLK
when using the AREG input register
Data hold time at the B input before the active transition at the CLK
when using the BREG input register
(2,4)
Description
Description
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(4)
(4)
(4)
(4)
Symbol
F
T
T
BUFG
GIO
GSI
(2)
-4 Speed Grade
Maximum
-4 Speed Grade
-0.97
3.98
0.23
0.39
0.04
0.05
Min
-
-
-
1.46
0.63
311
4.88
Max
1.20
4.97
-
-
-
(1)
Units
MHz
ns
ns
Units
ns
ns
ns
ns
ns
ns
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