It might be a USB interface since it only has four pins. Sometimes laptops internally use USB for some of their internal peripherals as I understand (e.g. some built-in webcams, etc). But some peripherals (e.g. trackpads) with old laptops are possibly UART based so I could be wrong.
It might be a USB interface since it only has four pins. Sometimes laptops internally use USB for some of their internal peripherals as I understand (e.g. some built-in webcams, etc). But some peripherals (e.g. trackpads) with old laptops are possibly UART based so I could be wrong.
Yeah, looking at other photos now some do show a cable harness coming from the pack of the board. Perhaps the four pads are just for programming the module.
