English
Language : 

XC3S100E Datasheet, PDF (116/193 Pages) Xilinx, Inc – DC and Switching Characteristics
R
DC and Switching Characteristics
Configuration and JTAG Timing
VCCINT
1.2V
(Supply)
1.0V
VCCAUX
(Supply)
2.0V
2.5V
VCCO Bank 2
(Supply)
1.0V
PROG_B
(Input)
INIT_B
(Open-Drain)
CCLK
(Output)
TPOR
TPROG
TPL
TICCK
Notes:
DS312-3_01_020505
1. The VCCINT, VCCAUX, and VCCO supplies may be applied in any order.
2. The Low-going pulse on PROG_B is optional after power-on but necessary for reconfiguration without a power cycle.
3. The rising edge of INIT_B samples the voltage levels applied to the mode pins (M0 - M2).
Figure 3: Waveforms for Power-On and the Beginning of Configuration
Table 16: Power-On Timing and the Beginning of Configuration
Symbol
TPOR(2)
TPROG
TPL(2)
TICCK(3)
Description
The time from the application of VCCINT, VCCAUX, and VCCO
Bank 2 supply voltage ramps (whichever occurs last) to the
rising transition of the INIT_B pin
The width of the low-going pulse on the PROG_B pin
The time from the rising edge of the PROG_B pin to the
rising transition on the INIT_B pin
The time from the rising edge of the INIT_B pin to the
generation of the configuration clock signal at the CCLK
output pin
Device
XC3S100E
XC3S250E
XC3S500E
XC3S1200E
XC3S1600E
All
XC3S100E
XC3S250E
XC3S500E
XC3S1200E
XC3S1600E
All
All Speed Grades
Min
Max
-
5
-
5
-
5
-
5
-
7
0.3
-
-
2
-
2
-
2
-
2
-
3
0.5
4.0
Units
ms
ms
ms
ms
ms
µs
ms
ms
ms
ms
ms
µs
Notes:
1. The numbers in this table are based on the operating conditions set forth in Table 4. This means power must be applied to all VCCINT, VCCO,
and VCCAUX lines.
2. Power-on reset and the clearing of configuration memory occurs during this period.
3. This specification applies only to the Master Serial, SPI, BPI-Up, and BPI-Down modes.
DS312-3 (v1.0) March 1, 2005
www.xilinx.com
13
Advance Product Specification