Power Management - Congatec COM Express conga-TCA7 User Manual

Power Supply Implementation Guidelines
The 12 volt input power is the sole operational power source for the conga-TCA7. Other required voltages are generated internally on the
module using onboard voltage regulators.
Note
When designing a power supply for a conga-TC570 application, be aware that the system may malfunction when a 12V power supply that
produces non-monotonic voltage is used to power the system up. Though this problem is rare, it has been observed in some mobile power
supply applications.
This problem occurs because some internal circuits on the module (e.g. clock-generator chips) generate their own reset signals when the
supply voltage exceeds a certain voltage threshold. A voltage dip after passing this threshold may lead to these circuits becoming confused,
thereby resulting in a malfunction.
To ensure this problem does not occur, observe the power supply rise waveform through an oscilloscope, during the power supply qualication
phase. This will help to determine if the rise is indeed monotonic and does not have any dips. For more information, see the "Power Supply
Design Guide for Desktop Platform Form Factors" document at www.intel.com
5.1.13

Power Management

ACPI 5.0 compliant with battery support. Also supports Suspend to RAM (S3).
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