The power of external connector(such as CSI DSI M.2) should be turned off by PMIC

beagleboard / beaglebone-ai-64

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The power of external connector(such as CSI DSI M.2) should be turned off by PMIC #25

Closed JunqingXin closed 11 months ago

JunqingXin commented 3 years ago

@jadonk Jason, should we turn off the power of external connector(such as CSI, DSI, M.2, P8 P9, mikroBUS Header) by PMIC when the board power down by software? the power of CSI/DSI/M.2 connector connected to "VSYS_3V3" in first prototype which is the same as TI's demo, but I think it should be tied to "VSYS_IO_3V3", so the power can be turned off by GPIO "EN_3V3IO_LDSW" of PMIC. By the way, have you tested the POWER ON/OFF BUTTON SW2? it needs driver to control.

jadonk commented 3 years ago

Good find. I agree.

jadonk commented 3 years ago

MCU header could be in always-on domain, except the SPI pins are from the wrong power domain. This would allow connecting sensors that could wake the overall system.