R

External Interfaces

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.

+5V or +12V

MARGIN+

MARGIN-

 

VIN

VOUT

 

Voltage

 

Regulator

 

RSET

 

 

 

 

RKELVIN = 10 mΩ

 

 

VCCXXPR

 

 

 

VCCX

To FPGA or

 

 

 

 

 

 

 

1KΩ

Other Device

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VCCXX Mon

To

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VCCXX Sense-

Monitor

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VCCXX Sense+

Cable

 

 

 

 

 

 

 

 

 

 

UG199_c3_07_050106

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

 

 

 

 

 

 

 

 

 

 

 

Virtex-5 FPGA ML561 User Guide

www.xilinx.com

31

UG199 (v1.2) April 19, 2008

 

 

 

Page 31
Image 31
Xilinx ML561 manual Power On or Off Slide Switch, Soft Touch Probe Points, Power Measurement Header