Atx Power Distribution And Voltage Regulation - Xilinx ML410 User Manual

Chapter 2: ML410 Embedded Development Platform

ATX Power Distribution and Voltage Regulation

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I/O Voltage Margining (J24, J29, and J37)
The voltage margins on the board can be adjusted by shorting the jumpers as shown in
Table 2-43. Apply shorting jumpers only when the board is powered off. For more on
voltage regulation, see "ATX Power Distribution and Voltage Regulation."
Table 2-43: Voltage Margining Jumper Settings
Voltage Inhibit
(1)
Regulator Jumper
VR1 J30
VR2 J34
VR3 J35
Notes:
1. Inhibit jumpers are open by default at nominal voltage.
ML410 platforms are shipped with a commercially available 250W ATX power supply. All
voltages required by the ML410 logic devices are derived from the 5V supply, except the
±12V supplies, as shown in
a standard ATX chassis along with the ML410 board.
The ATX power supply is a Sparkle Power Inc. model FSP250-60PLN. The Sparkle User's
Manual is provided in the data sheet section on the ML410 documentation CD. The Sparkle
power supply supports a full range input to automatically accommodate a wide range of
voltage/frequency standards, such as 115V for North America, Japan, and others, and
230V for most European countries. See the Sparkle User's Manual for more information.
www.xilinx.com
Margin
Jumper
To adjust the 2.5V supply:
• Equal to or greater than –5% margining, short
pins 1–2 on J34
J34
• Equal to or greater than +5% margining, short
pins 2–3 on J34
• No margining, leave pins open on J34
To adjust the 1.2V supply:
• Equal to or greater than –5% margining, short
pins 1–2 on J29
J29
• Equal to or greater than +5% margining, short
pins 2–3
• No margining, leave pins open
To adjust the 2.0V supply:
• Equal to or greater than –5% margining, short
pins 1–2
J37
• Equal to or greater than +5% margining, short
pins 2–3
• No margining, leave pins open
Figure 2-22. The ATX power supply can be easily mounted in
ML410 Embedded Development Platform
Description
UG085 (v1.7.2) December 11, 2008
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