Power Enable/Power Good; Voltage Supply Inputs; Module Power Status And Control Pins - Enclustra Mars XU3 User Manual

MIO pin 31) low. In this case the generated voltage for the PL core will be 0.72 V.
The 0.9 V core supply for PS and PL is not supported, as the MPSoC devices equipped on the Mars XU3 SoC
module are currently not available in speedgrade -3E, which would require a core voltage of 0.9 V.
Please refer to the Enclustra Module Pin Connection Guidelines for general rules on the power pins [10].
2.11.2

Power Enable/Power Good

The Mars XU3 SoC module provides a power enable input on the module connector. This input may be
used to shut down the DC/DC converters and LDOs for 0.72/0.85/0.9 V, 0.85/0.9 V, 1.2 V, 1.8 V and 2.5 V,
leaving the MPSoC device and the DDR4 SDRAM unpowered.
The PWR_EN input is pulled to VCC_3V3 on the Mars XU3 SoC module with a 10 k resistor. The PWR_GOOD
signal is pulled to VCC_3V3 on the Mars XU3 SoC module with a 10 k resistor.
PWR_GOOD is an open collector signal and must not be used to drive a load directly. This signal is pulled
to GND if the on-board regulators fail or if the module is disabled via PWR_EN. The list of regulators that
influence the state of PWR_GOOD signal is provided in Section 2.11.1.
Pin Name Module Connector Pin
PWR_EN 13
PWR_GOOD 40
Table 12: Module Power Status and Control Pins
Warning!
Do not apply any other voltages to the PWR_EN pin than 3.3 V or GND, as this may damage the Mars
XU3 SoC module. PWR_EN pin can be left unconnected.
Do not power the VCC_IO pins when PWR_EN is driven low to disable the module. In this case, VCC_IO
needs to be switched off in the manner indicated in Figure 9.
2.11.3

Voltage Supply Inputs

Table 13 describes the power supply inputs on the Mars XU3 SoC module. The VCC voltages used as supplies
for the I/O banks are described in Section 2.9.5.
D-0000-432-001
Remarks
Floating/3.3 V: Module power enabled
Driven low: Module power disabled
0 V: Module supply not ok
3.3 V: Module supply ok
23 / 52 Version 04, 25.07.2019