Power; Power Generation Overview; Power Enable/Power Good; Generated Power Supplies - Enclustra Mercury SA1 SoC Module User Manual

Warning!
No AC coupling capacitors are placed on the Mercury SA1 SoC module on the MGT lines - make sure
capacitors are mounted, if required, on the base board (close to the module pins), to prevent MGT lines
from being damaged.
2.11

Power

2.11.1

Power Generation Overview

The Mercury SA1 SoC module uses a 5 - 15 V DC power input for generating the on-board supply voltages
(1.1 V, 1.2 V, 1.35 V, 1.8 V, 2.5 V and 3.3 V). Some of these voltages (1.8 V, 2.5 V, 3.3 V) are accessible on the
module connector.
Table 10 describes the power supplies generated on the module.
Voltage Voltage
Supply Name Value
VCC_1V1 1.1 V
VCC_1V2 1.2 V
VCC_1V35 1.35 V
VCC_1V8 1.8 V
VCC_2V5 2.5 V
VCC_3V3 3.3 V
Table 10: Generated Power Supplies
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 Mercury SA1 SoC module provides a power enable input on the module connector. This input may be
used to shut down the DC/DC converters for 1.1 V, 1.2 V, 1.5 V, 1.8 V, and 2.5 V. The 3.3 V supply is always active.
The PWR_EN input is pulled to VCC_3V3 on the Mercury SA1 SoC module with a 4.7 k
PWR_GOOD signal is pulled to VCC_3V3 on the Mercury SA1 SoC module with a 4.7 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.
D-0000-402-002
Rated Voltage
Current Source
9 A VCC_MOD
1 A VCC_3V3
1.5 A VCC_3V3
1 A VCC_3V3
1.5 A VCC_3V3
9 A VCC_MOD
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Shut down Influences
via PWR_EN PWR_GOOD
Yes Yes
Yes Yes
Yes Yes
Yes Yes
Yes Yes
No Yes
resistor. The
Version 06, 16.02.2021