Description
Function
Pin
Pin
Function
Description
Segment 36 /
QTouch X-line 0
SEG36 / QT_X0
41
42
SEG37 / QT_Y0
Segment 37 /
QTouch Y-line 0
Common terminal 4
COM4
43
44
COM5
Common terminal 5
Common terminal 6
COM6
45
46
COM7
Common terminal 6
Backlight anode
Backlight V+
47
48
Backlight V-
Backlight cathode
Backlight control
Backlight CTRL
49
50
ID
Xplained Pro ID
Ground
GND
51
3.5.3.
Xplained Pro Power Header
The power header can be used to connect external power to the SAM L22 Xplained Pro kit. The kit will
automatically detect and switch to any external power if supplied. The power header can also be used as
supply for external peripherals or extension boards. Care must be taken not to exceed the total current
limitation of the on-board regulator when using the 3.3V pin.
Table 3-6. Xplained Pro Power Header
Pin number
Pin name
Description
1
VEXT_P5V0
External 5V input
2
GND
Ground
3
VCC_P5V0
Unregulated 5V (output, derived from one of the input sources)
4
VCC_P3V3
Regulated 3.3V (output, used as main power supply for the kit)
Atmel SAM L22 Xplained Pro [USER GUIDE]
Atmel-42474B-SAM-L22-Xplained-Pro_User Guide-12/2015
14
