Voltage Voltage Rated Voltage Shut down
Supply Name Value Current Source via PWR_EN
VCC_1V0 1.0 V 4 A VCC_MOD Yes
VCC_DDR3L 1.35 V/1.5 V 2 A VCC_MOD Yes
VCC_1V8 1.8 V 2 A VCC_MOD Yes
Table 11: Generated Power Supplies
Please refer to the Enclustra Module Pin Connection Guidelines for general rules on the power pins [10].
2.10.2 Power Enable/Power Good
The Mars ZX3 SoC module provides a power enable input on the module connector. This input may be used
to shut down the DC/DC converters for 1.0 V, 1.35 V/1.5 V and 1.8 V, leaving the SoC device and the DDR3
SDRAM unpowered, and detaching the separate 3.3 V power input from the peripherals.
The PWR_EN input is pulled to VCC_3V3 on the Mars ZX3 SoC module with a 10 kΩ resistor. The PWR_GOOD
signal is pulled to VCC_3V3 on the Mars ZX3 SoC module with a 10 kΩ 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 any of the on-board regulators fail or if the module is disabled via PWR_EN.
Pin Name Module Connector Pin Remarks
PWR_EN 13
Floating/3.3 V: Module power enabled
Driven low: Module power disabled
PWR_GOOD 40
0 V: Module supply not ok
3.3 V: Module supply ok
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
ZX3 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.
2.10.3 Voltage Supply Inputs
Table 13 describes the power supply inputs on the Mars ZX3 SoC module. The VCC voltages used as supplies
for the I/O banks are described in Section 2.9.5.
D-0000-424-004 21 / 48 Version 05, 21.08.2018
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