Xilinx AC701 User Manual page 63

internally ORs these PG conditions together and drives an output PG pin high only if all
active rail PG states are good. The on and off delay parameter values are relative to when
the board power on-off slide switch SW15 is turned on and off.
Table 1-28
UCD90120A U8 controller at PMBus Address 101.
Table 1-28: Power Rail Specifications for UCD90120A PMBus Controller U8 at Address 101
Nominal
Rail
Voltage
1 VINT_1V0 1.000
2 VAUX_1V8 1.800
3 VBRAM_1V0 1.000
4 FPGA_1V5 1.500
Table 1-29
UCD90120A U9 controller at PMBus Address 102.
Table 1-29: Power Rail Specifications for UCD90120A PMBus controller U9 at Address 102
Nominal
Rail
Voltage
1 VADJ_2V5 2.500
2 FPGA_1V8 1.800
3 FPGA_3V3 3.300
4 MGTVC_1V0 1.000
5 MGTVT_1V2 1.200
VCCO_VADJ Voltage Control
The FMC VCCO_VADJ rail is set to 2.5V. When the AC701 board is powered on, the state
of the FMC_VADJ_ON_B signal wired to header J8 is sampled by the TI UCD90120A
controller U9. If a jumper is installed on J8, signal FMC_VADJ_ON_B is held low, and TI
controller U9 energizes the FMC VCCO_VADJ rail at power on.
Removing the jumper at J8 after the board is powered up will not affect the 2.5V power
delivered to the VCCO_VADJ rail and it will remain on.
A jumper installed at J8 is the default setting. If a jumper is not installed on J8 at power-on,
the signal FMC_VADJ_ON_B is high and the AC701 board will not energize the
VCCO_VADJ 2.5V power.
Installing a jumper at J8 after the AC701 board powers up in this mode will turn on the
VCCO_VADJ rail.
AC701 Evaluation Board
UG952 (v1.0) October 23, 2012
defines the voltage and current values for each power rail controlled by the
Power Good On Power Good Off
0.900 -10.0% 0.850
1.620 -10.0% 1.530
0.900 -10.0% 0.850
1.350 -10.0% 1.275
defines the voltage and current values for each power rail controlled by the
Power Good On Power Good Off
2.250 -10.0% 2.125
1.620 -10.0% 1.530
2.970 -10.0% 2.805
0.900 -10.0% 0.850
1.080 -10.0% 1.020
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Turn
Turn On
Off
Delay
Delay
(ms)
(ms)
-15.0% 0.0 15.0
-15.0% 10.0 5.0
-15.0% 5.0 10.0
-15.0% 15.0 0.0
Turn Turn
On Off
Shutdown
Delay Delay
(ms) (ms)
-15.0% 5.0 15.0 Rail #2,3,4,5
-15.0% 10.0 10.0 Rail #1,3,4,5
-15.0% 0.0 20.0 Rail #1,2,4,5
-15.0% 5.0 5.0 Rail #1,2,3,5
-15.0% 10.0 0.0 Rail #1,2,3,4
Feature Descriptions
Rail Turn-on
Fault
Dependencies
Shutdown
Slaves
Rail GPI
Rail #2,3,4 None None
Rail #1,3,4 Rail #3 None
Rail #1,2,4 Rail #1 None
Rail #1,2,3 Rail #2 None
Rail Turn-on
Fault
Dependencies
Slaves
Rail GPI
FMC_
Rail #3 VADJ_
ON_B
None None
None None
Rail #2 None
Rail #4 None
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