QT3 Xplained Pro implements two Xplained Pro Standard Extension Header marked with EXT1 and EXT2 in silkscreen. These headers make it possible to connect the board to an Xplained Pro MCU board with an MCU featuring a PTC module. The pin-out definition for the extension headers can be seen in Table 1 and Table 2.
The X-sensors of the touch pad are available on both EXT1 and EXT2 header on the kit for supporting Xplained Pro MCU kits with and without the EXT2 header. Driving the LEDs require both headers to be connected.
Pin on EXT1 | Function | Description |
---|---|---|
1 | ID | Communication line to the ID chip |
2 | GND | Ground |
3 | Y LINE 1 | For keypad: "1", "2", and "3" |
4 | Y LINE 2 | For keypad: "4", "5", and "6" |
5 | Y LINE 3 | For keypad: "7", "8", and "9" |
6 | Y LINE 4 | For keypad: "C", "0", and "#" |
7 | X LINE 1 | X-line 1 (For use with MCU kits without EXT2 header) |
8 | X LINE 2 | X-line 2 (For use with MCU kits without EXT2 header) |
9 | X LINE 3 | X-line 3 (For use with MCU kits without EXT2 header) |
10 | Not Connected | |
11 | Not Connected | |
12 | Not Connected | |
13 | Not Connected | |
14 | Not Connected | |
15 | LED COL1 | LED driver for column 1 |
16 | LED COL2 | LED driver for column 2 |
17 | LED COL3 | LED driver for column 3 |
18 | LED COL4 | LED driver for column 4 |
19 | GND | Ground |
20 | VCC | Target supply voltage |
Pin on EXT1 | Function | Description |
---|---|---|
1 | ID | Communication line to the ID chip |
2 | GND | Ground |
3 | X LINE 1 | For keypad: "1", "4", "7", and "C" |
4 | X LINE 2 | For keypad: "2", "5", "8", and "0" |
5 | X LINE 3 | For keypad: "3", "6"," 9", and "#" |
6 | Not Connected | |
7 | LED ROW1 | |
8 | LED ROW2 | |
9 | LED ROW3 | |
10 | LED ROW4 | |
11 | Not Connected | |
12 | Not Connected | |
13 | Not Connected | |
14 | Not Connected | |
15 | Not Connected | |
16 | Not Connected | |
17 | Not Connected | |
18 | Not Connected | |
19 | GND | Ground |
20 | Not Connected |