FMC XM105 Debug Card User Guide www.xilinx.com 29
UG537 (v1.2) September 24, 2010
Board Technical Description
16. Power Good LEDS
Three power good LEDS are on the board with functions defined in Table 1-18.
17. Connector J18
This 2 x 1 position connector facilitates connection of the board signal PG_M2C on pin J17-
F1 to ground on the XM105. Boards listed in Table 1-1, page 8 have pull-up resistors on this
FPGA input. Connection to ground is only used to signal power not good from the XM105 to
the board. There are no power supplies on this XM105. By default, the connector is left
open. See Xilinx board user guides and schematics for additional information.
• Shunt OFF = PG_M2C signal asserted on the board through pull-up resistor to V
CCO
(default). No connection to the XM105.
• Shunt ON = J17-F1 PG_M2C signal connected to GND. Power not good signaled to the
board.
Table 1-18: Power Good LED Indicators
Power
Good
Indicator
Description Controlled by...
DS5 Board power good
This LED is driven by the signal PG_C2M output from the
board to the mezzanine connector on connector J17 pin
D1. Board power good is indicated when this LED is on.
Reference the Xilinx board schematics and user guides for
additional information on the power system.
DS6
XM105 +12V input
power good
+12V input voltage from FMC LPC pins J17-C34 and J17-
C37. The +12V power input is good when this LED is on.
DS7
XM105 VADJ input
power good
VADJ input voltage on the FMC HPC VADJ pins from
the board power is good. Xilinx FMC-supported
platforms listed in Table 1-1, page 8
connect 2.5V to the
FMC HPC and FMC LPC connectors.
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