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congatec
AG
MA50m17
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Note
The module is kept in reset as long as the PWR_OK is driven by carrier board hardware.
It is strongly recommended that the carrier board hardware drives the signal low until it is safe to let the module boot-up.
The three typical usage scenarios for a carrier board design are:
•
Connect PWR_OK to the “power good” signal of an ATX type power supply.
•
Connect PWR_OK to the last voltage regulator in the chain on the carrier board.
•
Simply pull PWR_OK with a 1k resistor to the carrier board 3.3V power rail.
With this solution, you must make sure that by the time the 3.3V is up, all carrier board hardware is fully powered and all clocks are stable.
The conga-MA5 provides support for controlling ATX-style power supplies. When not using an ATX power supply then the conga-MA5's pins
SUS_S3/PS_ON, 5V_SB, and PWRBTN# should be left unconnected.