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XT55 AVL User’s Guide

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XT55_avl_ug_V03 Page 35 of 37 28.06.2004

4.3 Digital Inputs

The input pins (pin 20 – GPIO 15, pin 30 – GPIO 3) of the 80-pin board-to-board connector

are pre-defined as digital inputs.

These input pins can be connected to the CMOS +3.3V DC. The figure below illustrates how

to connect these inputs.

Figure 12: Connection example for GPIO 15 and GPIO 3

1 2 ... 30 31 32 33 34 35 36 37

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Siemens XT55 AVL Manuale Utente Pagina 35