Power Regulation And Filtering; Figure D-2: Power Filtering Network For One Transceiver; Table D-4: Voltage Changes For Virtex-Ii Pro X Fpga Power Regulation - Xilinx RocketIO X User Manual

Power Regulation and Filtering

Power Regulation and Filtering
As with Virtex-II Pro FPGAs, each Virtex-II Pro X transceiver has five power supply pins, all of
which are sensitive to noise.
(relative to Virtex-II Pro), including their names, associated voltages, and power requirements.
To operate properly, RocketIO and RocketIO X transceivers require a certain level of noise
isolation from surrounding noise sources. For this reason, it is required that both dedicated
voltage regulators and passive high-frequency filtering be used to power RocketIO and
RocketIO X circuitry. Voltage regulation requirements for Virtex-II Pro X FPGAs are
identical to Virtex-II Pro FPGAs. Two Linear Technology LT1963 regulator circuits are
needed to generate the required 1.5V and 2.5V supplies. For more information, see the
voltage regulation sections of this guide and the RocketIO Transceiver User Guide (

Table D-4: Voltage Changes for Virtex-II Pro X FPGA Power Regulation

Virtex-II Pro
Supply Voltage
AVCCAUXTX 2.5V
AVCCAUXRX 2.5V
VTTX 1.8V–2.625V
VTRX 1.8V–2.625V
GNDA 0V
Notes:
1. Power listed is the estimated power per MGT for the individual supply over all MGT operating modes. The total power per MGT is mode
specific and less than the sum total of these values.
2. Power figures shown do not include power requirements of V
3. Dependent on mode, voltage level, swing, and emphasis settings.
4. Dependent on termination style, voltage level, and swing. For 100Ω differential termination, VTRX is unconnected (0 mW). Refer to
Figure D-2
requires one ferrite bead. The ferrite bead is the Murata BLM18AG102SN1.
Note:
RocketIO™ X Transceiver User Guide
UG035 (v1.5) November 22, 2004
Table D-4
Supply Voltage
AVCCAUXTX 2.5V
AVCCAUXRX 1.5V
VTTX 1.5V
VTRX 0.25–2.5V
GNDA 0V
(82 mW) and V
CC
shows the power filtering network for one transceiver. Each transceiver power pin
These components must not be shared under any circumstances.
1.5V
BLM18AG102SN1
2.5V
BLM18AG102SN1
1.5V
BLM18AG102SN1
V
TR
BLM18AG102SN1

Figure D-2: Power Filtering Network for One Transceiver

www.xilinx.com
1-800-255-7778
summarizes the Virtex-II Pro X power supply pins
(1)
Virtex-II Pro X
Power Power
2.5 Gb/s (mW) 5.0 Gb/s (mW)
TBD TBD
TBD TBD
TBD TBD
TBD TBD
TBD TBD
(140 mW), which power the PCS and PMA, respectively.
CCAUX
AVCCAUXRX
AVCCAUXTX
VTTX
VTRX
GNDA
ug035_ch4_16_111103
R
).
UG024
(2)
Power
10 Gb/s (mW)
125
141
(3)
108
(4)
12
N/A
Figure 4-28.
171