Other Minor Differences; Termination - Xilinx Virtex-4 RocketIO User Manual

R
Device With In-Package Capacitors
2.5 V
AVCCAUXTX
AVCCAUXRX
VTT
VTTX
VTR
VTRX
GNDA
Virtex-II Pro Power Supply Filtering
1.5V
MPZ1608S221A.
2.5V
MPZ1608S221A.
1.5V
MPZ1608S221A.
V
TR
MPZ1608S221A.
Virtex-II Pro X Power Supply Filtering
Figure E-2: Virtex-II, Virtex-II Pro, and Virtex-4 Power Supply Filtering

Other Minor Differences

Termination

In Virtex-II Pro and Virtex-II Pro X devices, the transceivers contained on-chip termination
and reference voltages for V
resistor to create the termination circuitry for each MGT column. These new package pins
are RTERM and MGTVREF (see
more details).
Virtex-4 RocketIO MGT User Guide
UG076 (v4.1) November 2, 2008
Device Without In-Package Capacitors
2.5 V
AVCCAUXTX
AVCCAUXRX
VTT
VTTX
VTR
VTRX
GNDA
AVCCAUXRX
AVCCAUXTX
VTTX
VTRX
GNDA
Table E-6 shows the termination options for each generation.
www.xilinx.com
VTTXA
VTTXB
VTRXA
VTRXB
AVCCAUXTX
AVCCAUXRXA
AVCCAUXRXB
AVCCAUXMGT
RTERM
MGTVREF
GNDA
Notes:
1. Capacitors are 0402 0.22 mF.
2. Ferrite Beads are MPZ1608S221A.
3. There are multiple GNDA per Tile.
4. RTERM and MGTVREF can always be left floating
for commercial-grade and industrial-grade parts.
Virtex-4 Power Supply Filtering
and V . In Virtex-4 devices, the MGTs use a reference
TTX TRX
Chapter 6, "Analog and Board Design Considerations"
Other Minor Differences
1.5V
1.5V Typical (0 - 2.5V)
1.2V
2.5V
X
X
ug076_apD_02_071907
for
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