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3-Feb-2015
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The table below shows the various voltage rails names on the schematic, the associated voltage
for each rail, where they are connected on the Zynq 7010/7020, and where the voltage originates
from.
Table 15
– PicoZed 7010/7020 Voltage Rails
Schematic
Voltage Name
Voltage Level
Zynq Connection
Voltage
Origination
1.0V
1.0V
VCCINT
SOM
VCCBRAM
VCCPINT
VCCO_DDR3
1.35V
VCCO_DDR_502 (Bank 502)
VTTREF
0.675V
PS_DDR_VREF0 (Bank 502)
PS_DDR_VREF1 (Bank 502)
1.8V
1.8V
VCCO_MIO1_501 (Bank 501)
VCCAUX
VCCPAUX
3.3V
3.3V
VCCO_0 (Bank 0)
VCC_MIO0_500 (Bank 500)
VCCO_34
1.8V/2.5V/3.3V
VCCO_34 (Bank 34)
JX1
VCCO_35
1.8V/2.5V/3.3V
VCCO_35 (Bank 35)
JX2
VCCO_13
1.8V/2.5V/3.3V
VCCO_13 (Bank 13)
JX2/JX3
2.10.2 Voltage Regulators
The following power solution provides the power rails of the PicoZed 7010/7020. Sequencing of
the supplies is implemented by cascading the POWER GOOD outputs of each supply to the
ENABLE input for the next supply in the sequence. 3.3V is the last supply to come up, therefore
the POWER GOOD for the 3.3V supply is used to drive the PG_MODULE net and is used as the
power-on reset control for Zynq (U11.pin C7), Ethernet PHY (U4.pin 16), and USB-Host PHY
(U5.pin 27).
This net is also connected to the Micro Headers so power supplies on the end user carrier card
can also control this signal.
Figure 6
– Regulation Circuitry (VCCIO_EN is PG_1V8)
This circuit sequences power-up of PicoZed 7010/7020. 1.0V comes up first, then 1.8V, then
VCCO_DDR3 and then 3.3V. PG_MODULE is connected to PS_POR_B on Zynq, thus when the
power supplies are valid, PS_POR_B is released.
When the PicoZed 7010/7020 is mated to an end user carrier card, the POWER GOOD outputs