Xilinx Virtex-4 FX FPGA, User Manual

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14 www.xilinx.com ML42 x User Guide
UG087 (v1.3) May 30, 2008
Detailed Description
R
MGT Power Supply Module
The MGT power supply module supplies all voltages shown in Table 3 to the DUT
RocketIO transceivers. This module plugs in on the right side of the board on header J12
for the ML421 platform, and on header J9 for the ML423 and ML424 platforms.
The onboard regulators also have corresponding input voltage jacks to supply each
voltage independently from a bench-top power supply. This is done by removing the MGT
power supply enable jumpers from the headers that correspond to each supply voltage
listed in
Table 3 . An MGT power enable jumper must be removed before supplying an
external supply on its corresponding supply jack.
2. FPGA Configuration
The FPGA can only be configured in JTAG mode using one of the following options:
•
Parallel Cable III cable
•
Parallel Cable IV cable
•
System ACE controller
Using the configuration address DIP switches, one of eight bitstreams stored in the
CompactFlash memory card can be accessed through the onboard System ACE controller.
Note:
The System ACE controller is bypassed when the flying wire leads or the Parallel Cable IV
cable is used, thus causing no disruption in the JTAG chain.
Table 3: Power Supply Module Jumpers
Power
Supply
Name
Max
Current
Rating
Typical
Voltage
Jack
Enable
Jumper
Description
ML421 ML423 ML424
AVCCAUXMGT 1.5A 2.5V J22 J22 J37 J11 Analog supply for global bias
VREF 1.5A 1.2V J23 J23 J58 J10
Optional supply for V
REF
circuit
(not required) or band gap
reference voltage
VTT TX LEFT 5A 1.5V J19 J19 J24 J7 X 2
Termination supply voltage for
transmitter A and B (left column)
AVCCAUXRX 5A 1.2V J20 J20 J25 J5 X 2
Analog supply for non-I/O
circuits in receiver A and analog
supply for non-I/O circuits in
receiver B, global bias, and
reference clock circuits
AVCCAUXTX 5A 1.2V J21 J21 J26 J4 X 2
Analog supply for non-I/O
circuits in transmitter pair
VTT TX RIGHT 5A 1.5V J18 J18 J18 J6 X 2
Termination supply voltage for
transmitter A and B (right
column)
VTT RX LEFT 1.5A 1.5V–2.5V J16 J15 J15 J8
Termination supply voltage for
receiver A and B (left column)
VTT RX RIGHT 1.5A 1.5V–2.5V J105 J81 J105 J9
Termination supply voltage for
receiver A and B (right column)
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