Power Switch - Xilinx Virtex-II Pro ML324 User Manual

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1. Power Switch

The board has an on-board power supply and an on|off power switch. When lit, a green
LED indicates power from the power brick connector or the 5V jack.
On Position
In the on position, the power switch enables delivery of all power to the board by way of
voltage regulators situated close to the left and right edges of the board. These regulators
feed off a 5V external power brick or the 5V power supply jack.
The voltage regulators deliver fixed voltages. Maximum current range for each voltage
regulator is 3A.
RocketIO termination voltages are situated on the right edge of the board and are marked
as VT_RX, VT_TX (top set) and VT_RX, VT_TX (bottom set). These can be used to deliver
a fixed voltage by appropriate selection of the resistors designated as R32, R39, R46, and
R49 (default is set to 2.5V). These can be made to deliver a variable voltage by
depopulating the above mentioned resistors and manipulating the potentiometers (R3, R9,
R10, R11). The voltage range is as shown in
Table 3: Voltage Ranges
Off Position
In the off position, the power switch disables all modes of powering the FPGA.
Power Enable Jumpers
For each power supply there are headers marked Supply on one side and Jack on the other
side. Appropriate placements of jumpers on these headers enables delivery of all power
from either the on-board regulators or power supply jacks marked V5, VCORE, VCCO,
VCCAUX, AVCCAUX, VT_TX, VT_RX (top set) and VT_TX, VT_RX (bottom set).
Virtex-II Pro ML324 and ML325 Platform
UG063 (v1.2) May 30, 2006
Label
VCORE
VCCO
VCCAUX
AVCCAUX
VT_TX (top set)
VT_RX (top set)
VT_TX (bottom set)
VT_RX (bottom set)
www.xilinx.com
Detailed Description
Table 3.
Max Voltage
1.5V (1.65V for -ES devices)
2.5V
2.5V
2.5V
1.7 - 2.5V
1.7 - 2.5V
1.7 - 2.5V
1.7 - 2.5V
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