Voltage Monitoring; Clock Generation; Voltage Monitoring Outputs - Enclustra Mercury SA1 SoC Module User Manual

Please note that the adhesive heat sink part is recommended only for prototyping purposes. In cases where
the module is used in environments subject to vibrations, additional mechanical fixation is recommended.
Warning!
Depending on the user application, the Mercury SA1 SoC module may consume more power than can
be dissipated without additional cooling measures; always make sure the SoC is adequately cooled by
installing a heat sink and/or providing air flow.
2.11.7

Voltage Monitoring

Several pins on the module connector on the Mercury SA1 SoC module are marked as VMON. These are
voltage monitoring outputs that are used in the production test for measuring some of the on-board volt-
ages.
It is not allowed to draw power from the voltage monitoring outputs.
Table 15 presents the VMON pins on the Mercury SA1 SoC module.
Pin Name Module Connector Pin
VMON_1V1 A-102
VMON_1V2 B-167
VMON_VTT B-168
VMON_1V35 B-8
Table 15: Voltage Monitoring Outputs
Warning!
The voltage monitoring outputs are for Enclustra-use only. Pinout changes may be applied between
revisions.
2.12

Clock Generation

A 50 MHz oscillator is used for the Mercury SA1 SoC module clock generation. The 50 MHz clock is fed to
the HPS and FPGA logic. The second HPS clock is provided by an external source (module connector pin
A-110) in the standard module configuration. A clock divider generates a 25 MHz clock for Ethernet - this
signal can also be generated from the external clock, by driving CLOCK_SEL pin of the SoC device (pin C12)
low.
D-0000-402-002
Connection Description
VCC_1V1 FPGA and HPS core voltages
VCC_1V2 1.2 V on-board voltage (default)/SoC battery
voltage (assembly option)
VCC_VTT DDR termination voltage
VCC_1V35 DDR3 voltage
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