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spacelab-ufsc / edc-power-adapter

EDC power adapter board
GNU General Public License v3.0
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Schematics: Develop the module schematics #5

Open mgm8 opened 4 years ago

mgm8 commented 4 years ago

Requirements:

TODO: Define the enable and the output pins.

YanAzer commented 4 years ago

For the enable pins, currently hardware wise the OBDH 2.0 has one GPIO (H1-18 pin) for a EDC payload enable, the GPIO present in the H1-20 pin of the PC104 connector is dedicated for the enable of "Payload X". There still needs to be definied another enable for a second redundant EDC. The easiest options would be swap the H1-20 enable at the moment of Payload-X to the second EDC or just defining the unused GPIO in H2-18 pin in PC104 (net label "ADD_GPIO0") or even choosen the other 3 available.

The initially though pins for the power outputs, H1-42 and H1-44 could be used without any changes to the current PC104 pionout.

Current PC104 of OBDH 2:

image

Current PC104 of EPS 2:

image

@mgm8 @andrempmattos what you guys think?

mgm8 commented 4 years ago

@YanAzer I think we can use both PAYLOAD_ENABLE pins and all ADD_GPIO pins, and then select the enable pins during the PCB assembly using 0R resistors.

NOTE: The pins of the Payload X board cannot be changed.