Chapter 12: Power Distribution; Ac Wall Adapter; Voltage Regulators - Xilinx Spartan-3 User Manual

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Power Distribution

AC Wall Adapter

The Spartan-3 Starter Kit includes an international-ready AC wall adapter that produces a
+5V DC output. Connect the AC wall adapter to the barrel connector along the left edge of
the board, indicated as
disconnect power, remove the AC adapter from the wall or disconnect the barrel connector.
The POWER indicator LED, shown as
applied to the board. If the jumpers in the J8 header and JP1 header are properly set and
there is a valid configuration data file in the Platform Flash memory, then the DONE
indicator LED, shown as
The AC wall adapter is directly compatible for North America, Japan, and Taiwan locales.
Other locations might require a socket adapter to convert from the North American
standard to the local power socket standard. The AC wall adapter operates from 100V to
240V AC input, at 50 or 60 Hz.

Voltage Regulators

There are multiple voltages supplied on the Spartan-3 Starter Kit Board, as summarized in
Table
Table 12-1: Voltage Supplies and Sources
Voltage
+5V DC AC Wall Adapter, 5V switching power supply
( in Figure
25
+3.3V DC National Semiconductor LM1086CS-ADJ 3.3V
regulator (
+2.5V DC STMicroelectronics LF25CDT 2.5V regulator
( in Figure
28
+1.2V DC Fairchild Semiconductor FAN1112 1.2V
regulator (
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
Spartan-3 Starter Kit Board User Guide
UG130 (v1.1) May 13, 2005
25
18
12-1.
Source
1-2)
in Figure 1-2)
27
1-2)
in Figure 1-2)
29
www.xilinx.com
1-800-255-7778
in Figure 1-2. There is no power switch to the board. To
in Figure 1-2, lights up when power is properly
26
in Figure 1-2, also lights up.
3.3V regulator
Optionally, PS/2 port via jumper JP2 setting
Pin 1 (VU) on A1, A2, B1 expansion connectors
2.5V and 1.2V regulators
V supply input for all FPGA I/O banks
CCO
Most components on the board
Pin 3 on A1, A2, B1 expansion connectors
V supply input to FPGA
CCAUX
V supply input to FPGA
CCINT
Chapter 12
Supplies
45