HW-SPAR3-SK-UNI-G Xilinx Inc, HW-SPAR3-SK-UNI-G Datasheet - Page 46

• Manufacturer Part Number: HW-SPAR3-SK-UNI-G
• Description: KIT STARTER SPARTAN-3
• Manufacturer: Xilinx Inc
• Series: Spartan-3r
• Type: FPGA Configurationr

Specifications of HW-SPAR3-SK-UNI-G

• Contents: Board, Cable, Software, Datasheets and User Manual
• For Use With/related Products: Spartan-3
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 122-1521

46
R
Overall, the 5V DC switching power adapter that connects to AC wall power powers the
board. A 3.3V regulator, powered by the 5V DC supply, provides power to the inputs of
the 2.5V and 1.2V regulators. Similarly, the 3.3V regulator feeds all the V
supply inputs to the FPGA’s I/O banks and powers most of the components on the board.
The 2.5V regulator supplies power to the FPGA’s V
voltage input supplies power to Digital Clock Managers (DCMs) within the FPGA and
supplies some of the I/O structures. In specific, all of the FPGA’s dedicated configuration
pins, such as DONE, PROG_B, CCLK, and the FPGA’s JTAG pins, are powered by
V
Consequently, the 2.5V supply has a current shunt resistor to prevent reverse current.
Finally, a 1.2V regulator supplies power to the FPGA’s V
power the FPGA’s core logic.
The board uses three discrete regulators to generate the necessary voltages. However,
various power supply vendors are developing integrated solutions specifically for
Spartan-3 FPGAs.
Figure A-3
Figure A-6
CCAUX
. The FPGA configuration interface on the board is powered by 3.3V.
provides a detailed schematic of the various voltage regulators. Similarly,
shows the power decoupling capacitors.
www.xilinx.com
Spartan-3 FPGA Starter Kit Board User Guide
CCAUX
CCINT
Chapter 12: Power Distribution
supply inputs. The V
voltage inputs, which
UG130 (v1.2) June 20, 2008
CCO
voltage
CCAUX