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ML52
x
User Guide
www.xilinx.com
13
UG225 (v2.1) August 4, 2010
Detailed Description
R
1. Power Switch
The board has onboard power supplies controlled by the power switch. When the V5 LED
is lit, this indicates the board is powered.
On Position
In the ON position, the power switch enables delivery of all power on the board by way of
voltage regulators situated close to the left side of the board and the MGT power module
situated close to the right side of the board. These regulators feed off the 5V external power
brick or the 5V power supply jack.
The 5V power brick is capable of providing a maximum of 6.5A. For designs that require
greater than 6.5A, an ATX power supply can be connected to the J27 hard drive power
connector.
Note:
5V must always be supplied to the board to enable the 3.3V regulator for the System ACE
controller chip. It is always recommended to check the power supply voltage values before testing
your design or taking measurements.
Off Position
In the OFF position, the power switch disables all modes of power on the board.
2. Power Regulation
Main Board Regulation
The ML52x platform has onboard regulation for the DUT main power supplies listed in
Table 2
. These regulators also have a corresponding input voltage jack to supply each
voltage independently from the bench-top power supply (see
Figure 3, page 14
). This is
done by removing the power supply enable jumpers for the headers that correspond to
each supply voltage listed in
Table 2
.
Note:
•
If your design exceeds the maximum current rating for any of the onboard regulators
for any given rail, that rail must be supplied by the external power jack.
•
The power enable jumper must be removed before supplying an external supply on
its corresponding supply jack.
Table 2:
Onboard Regulation: Voltage, Current, Jacks, and Jumpers
Power Supply
Name
Max Current
Rating
Typical
Voltage
Jack/
Connector
Enable
Jumper
Description
5V
N/A
5V
J27
J109
J100
N/A
Main input voltage for the ML52x boards
supplied through the jack, barrel connector
or Molex connector.
VCC33
3.0A
3.3V
N/A
N/A
Supplies 3.3V of the System ACE chip and
other onboard circuits.
VCCINT
7.0A / 30.0A
1.0V
J101
J112
Core voltage for the FPGA (DUT).
Max current rating:
• ML521 and ML523 boards rated at 7A
• ML525 board rated at 30A
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