4.2.1 PROTO1 Xplained Pro Extension Headers
The PROTO1 Xplained Pro has two 20-pin headers. One is angled (left side of the board) and is intended to be connected to a Xplained Pro MCU board, standard extension header. The other is a vertical header (right side of the board) that can be used to connect signals to the prototype area or to attach other extension modules to it. The signals are identical on both, except for the ID signal, which is slightly different. The rest of the signals follow the standard Xplained Pro extension header pin-out. The different ID signals are described in section PROTO1 Xplained Pro ID System.