ORCA SOM/ORCA Evaluation Kit/Interfaces and Connectors/Power Supply

History
Issue Date	Notes
2021/12/10	First release

Power Supply interface

The Evaluation Kit is powered by one of the USB Type-C connectors. To properly power the system the wall adapter must support the power delivery protocol.

Description

The Power Supply interface available on the Evaluation Kit at the connector J3

J3 is a USB Type-C connector for USB3 data transfer and board supply,

Power Supply connector

Signals

The following table describes the interface signals:

Pin#	Pin name	Pin function	Pin Notes
A4, A9, B4, B9	VBUS1	Board supply
A1, A12, B1, B12	GND	Ground
A6, A7, B6, B7, A2, A3, B10, B11, B2, B3, A10, A11, A5, B5, A8, B8		USB signals	See USB ports

Power LED

DL2 is a green LED (placed near the reset button) that shows the status of the power input. This LED is ON when a valid power supply is present and the system is out of reset.

Device usage

The USB-C PD protocol starts providing 5V to the system, this voltage is enough to boot the CPU and execute the bootloader.

The bootloader starts the PD handshake with the wall adapter and chose the input rail voltage between 5V, 9V, 12V, 15V or 20V.

By default the Evaluation Kit sets the input to 12V for LCD backlight compatibility, see the LVDS section for more details.

Alternate supply

An auxiliary connector is present on the board (not mounted by default) to power the system with a standard power supply.

This connector is meant for developing purpose (eg when the SW is not already able to handshake a valid PD profile) and cannot be mounted for some Evaluation Kit models.

Description

Power can be provided through the J20 connector. Power voltage range is +[12-24 V].

J20 is a two pins MC 1,5/2-G-3,81 Phoenix connector.

J20 Power Supply connector

Signals

The following table describes the interface signals:

Pin#	Pin name	Pin function	Pin Notes
1	VIN_AUX	Board supply	+[12-24 V]
2	GND	Ground

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