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Xinyuan-LilyGO / LilyGo-T-PCIE

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Schematic is not reliable. #35

Open sam0910 opened 5 months ago

sam0910 commented 5 months ago

Greetings! In the T_PCIE-V1.2.pdf, you are using AXP2101 which have 4DCDC and 11 LDOs, but according the schematic , none of them connect to any of power path! just connected to bunch of TestPoints.

Where is +3V3 coming from for ESP32 power? I could not find any label with +3V3!

mattcaves commented 2 months ago

Hey Sam,

Looking at the V1.1 schematic, there is a VDD3V3 link to +3V3 on the last page at the bottom right of the regulator:

image

Whereas on the V1.2 schematic, the link is between PMU_DCDC1 to PMU_DCDC1:

image

It looks like that's a typo and should be a link between PMU_DCDC1 to +3V3. Also, buzzing out the board it confirms that the output of the regulator is connected to the +3V3.

Cheers! Matt