Tuesday 14 July 2015

power supply - Pin of micro USB connector in Smartphone


The image below shows a Micro USB connector in a smartphone. I understand what the first 5 pins of the USB are i.e. USB_DM, USB_DP, USB_ID , VBUS and GND.


enter image description here


The pin S1 is connected to VBAT (battery voltage pin) through a load switch.


Can anyone explain to me the function of the S1 pin?





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