XA3S500E-4PQG208I Datasheet, PDF (16/37 Pages) Xilinx, Inc – Proven advanced 90-nanometer process technology

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Table 15: Setup and Hold Times for the IOB Input Path
Symbol
Description
Setup Times
T_IOPICK
Time from the setup of data at the Input
pin to the active transition at the ICLK input
of the Input Flip-Flop (IFF). No Input Delay
is programmed.
T_IOPICKD
Time from the setup of data at the Input
pin to the active transition at the IFF’s ICLK
input. The Input Delay is programmed.
Conditions
LVCMOS25⁽²⁾,
IFD_DELAY_VALUE = 0
LVCMOS25⁽²⁾,
IFD_DELAY_VALUE =
default software setting
Hold Times
T_IOICKP
Time from the active transition at the IFF’s
ICLK input to the point where data must be
held at the Input pin. No Input Delay is
programmed.
T_IOICKPD
Time from the active transition at the IFF’s
ICLK input to the point where data must be
held at the Input pin. The Input Delay is
programmed.
LVCMOS25⁽²⁾,
IFD_DELAY_VALUE = 0
LVCMOS25⁽²⁾,
IFD_DELAY_VALUE =
default software setting
Set/Reset Pulse Width
T_{RPW_IOB} Minimum pulse width to SR control input
on IOB
IFD_
DELAY_
VALUE
0
Device
All
-4
Speed
Grade
Min
Units
2.12
ns
2
XA3S100E
6.49
ns
3
XA3S250E
6.85
ns
2
XA3S500E
7.01
ns
5
XA3S1200E
8.67
ns
4
XA3S1600E
7.69
ns
0
All
–0.76 ns
2
XA3S100E
–3.93 ns
3
XA3S250E
–3.51 ns
2
XA3S500E
–3.74 ns
5
XA3S1200E –4.30 ns
4
XA3S1600E –4.14 ns
All
1.80
ns
Notes:
1. The numbers in this table are tested using the methodology presented in Table 19 and are based on the operating conditions set forth in
Table 6 and Table 9.
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 17.
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 17. When the hold time is negative, it is possible to change the data before the clock’s active
edge.
DS635 (v2.0) September 9, 2009
www.xilinx.com
Product Specification
16