S1 - MCLR reset button
S2 - Application button
S3 - Application button
D1 - Application LED
D2 - Application LED
D3 - Application LED
D4 - Application LED
D7 - Bus powered indicator - When this LED is illuminated, the board is being powered by the USB bus.
D8 - Self powered indicator - When this LED is illuminated, the board is being powered by an external power supply.
JP11 - connects RB2 of the microcontroller to the temperature sensor on the board (U4). On some revisions of the board there is a trace shorting this jumper that needs to be cut in order to open this jumper.
MLA - USB Library Help Version : 2.16
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