XC3S200A-4VQG100C Datasheet, PDF (26/132 Pages) Xilinx, Inc – Architectural and Configuration Overview

DC and Switching Characteristics
Table 20: Setup and Hold Times for the IOB Input Path(Continued)
Symbol
T_IOICKPD
Description
Conditions
Time from the active transition at the
ICLK input of the Input Flip-Flop (IFF)
to the point where data must be held
at the Input pin. The Input Delay is
programmed.
LVCMOS25⁽³⁾
Set/Reset Pulse Width
T_{RPW_IOB}
Minimum pulse width to SR control
input on IOB
-
IFD_
DELAY_
VALUE
Device
1 XC3S400A
2
3
4
5
6
7
8
1 XC3S700A
2
3
4
5
6
7
8
1 XC3S1400A
2
3
4
5
6
7
8
-
All
Speed Grade
-5
-4
Min
Min
–1.12 –1.12
–1.70 –1.70
–2.08 –2.08
–2.38 –2.38
–2.23 –2.23
–2.69 –2.69
–3.08 –3.08
–3.35 –3.35
–1.67 –1.67
–2.27 –2.27
–2.59 –2.59
–2.92 –2.92
–2.89 –2.89
–3.22 –3.22
–3.52 –3.52
–3.81 –3.81
–1.60 –1.60
–2.06 –2.06
–2.46 –2.46
–2.86 –2.86
–2.88 –2.88
–3.24 –3.24
–3.55 –3.55
–3.89 –3.89
Units
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
1.33
1.61
ns
Notes:
1. The numbers in this table are tested using the methodology presented in Table 27 and are based on the operating conditions set forth in
Table 8 and Table 11.
2. This setup time requires adjustment whenever a signal standard other than LVCMOS25 is assigned to the data Input. If this is true, add the
appropriate Input adjustment from Table 23.
3. These hold times require adjustment whenever a signal standard other than LVCMOS25 is assigned to the data Input. If this is true, subtract
the appropriate Input adjustment from Table 23. When the hold time is negative, it is possible to change the data before the clock’s active
edge.
Table 21: Sample Window (Source Synchronous)
Symbol
Description
Max
T_SAMP Setup and hold
capture window of
an IOB flip-flop.
The input capture sample window value is highly specific to a particular application, device,
package, I/O standard, I/O placement, DCM usage, and clock buffer. Please consult the
appropriate Xilinx Answer Record for application-specific values.
• Answer Record 30879
Units
ps
26
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DS529-3 (v2.0) August 19, 2010