Xilinx Virtex-5 FPGA ML561 - Manual (Page 31)

Virtex-5 FPGA ML561 User Guide www.xilinx.com 31
UG199 (v1.2.1) June 15, 2009
External Interfaces R
Power On or Off Slide Switch
The power on or off slide switch is a DPST slide switch used to apply input power to the
board. While the board contains two such switches, the 5V switch is primarily used to
supply 5V power to the board, whereas the 12V switch is available for testing only.
Soft Touch Probe Points
Soft Touch E5396A Probeless connection points are provided for monitoring FPGA #2 and
FPGA #3 test signals with a compatible Agilent logic analyzer. FPGA #2 uses separate test
signals for soft touch pins, while FPGA #3 shares the general-purpose test header signals
with soft touch pins due to lack of available I/O pins.
Power Measurement Header
The ML561 comes with a 3M Pak 100 power measurement header to enable easy
measurement of the power being consumed by the devices on the ML561. Each power
regulator uses an Isotek Kelvin current sense resistor (SMV-R010-0.5) in the path from the
output of the regulator to the power plane. The power can be computed by measuring the
voltage drop across each of these resistors.
Figure 3-7: Virtex-5 FPGA ML561 Development Board Power Measurement System
Table 3-15: Power Measurement Header Pins (P102)
Header Signal Power Header Pin #
VCC1V0_SENSE+ 1
VCC1V0_SENSE- 2
VCC1V0_MON 3
VCC2V5_SENSE+ 5
VCC2V5_SENSE- 6
VCC2V5_MON 7
VCC3V3_SENSE+ 9
VCC3V3_SENSE- 10
VCC3V3_MON 11
UG199_c3_07_050106
MARGIN+ MARGIN-
Voltage
Regulator
R
SET
V
IN
V
OUT
+5V or +12V
To FPGA or
Other Device
To
Monitor
Cable
V
CCXX
Sense-
V
CCXX
Sense+
V
CCXX
Mon
V
CCX
R
KELVIN
= 10 m Ω
1K Ω
V
CCXXPR