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of the end user carrier card should also be tied to the PG_MODULE net on JX1.pin 8. If the end
user carrier card power supplies do not have POWER GOOD outputs, a voltage supervisor or
open-drain buffer should be used to complement this circuit.
PicoZed 7010/7020 also provides a power good signal to the end user carrier card to signal that
Vccint and Vccaux are both up and the end user carrier card is free to bring up the Vcco supplies.
This signal is called VCCIO_EN (PG_1V8) and is tied to JX2.pin 10.
NOTE: VCCIO_EN is provided by the power good output of the 1.8V regulator.
The table below shows the maximum output current for each regulator on the PicoZed 7010/7020
System-On-Module.
Table 16
– Voltage Rails w/ Max Output Current
TI Part Number
Voltage
(V)
Max
Current (A)
TLV62130
1.0
3
TLV62130
1.8
3
TLV62130
1.35
3
TLV62130
3.3
3
TPS51206
0.675
2
2.10.3 Power Supply Sequencing
When attached to an end user carrier card, the carrier card must provide an active-high, power
enable signal, PWR_ENABLE. This controls the first PicoZed 7010/7020 regulator (U19, 1.0V)
turning on. This should be an open drain design such that this signal will float high (pulled high to
5V or 12V on PicoZed 7010/7020). This may allow for the special circumstance of the end user
carrier card controlling the powering of the PicoZed 7010/7020 for low power applications.
Sequencing for the power supplies follows the recommendations for the Zynq device.
VCCINT/VCCPINT/VCCBRAM and VCCAUX/VCCPAUX supplies are tied together on the
PicoZed 7010/7020 platform to create a low cost design. The following diagram illustrates the
supply sequencing: