Peripherals; Qtouch Button; Crystals - Atmel Xplained Pro SAM4L User Manual

Pin on EXT5
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
4.2

Peripherals

4.2.1

QTouch button

The SAM4L Xplained Pro kit has one QTouch button and the connection to the SAM4L is shown in the table
below. The QTouch sensor, a copper fill, is located on the second layer (GND) of the board. The sensor is
shielded by the third and the bottome layer (VCC and signal layer respectively) and therefore the sensor is not
affected by any touches from the back side of the board.
Table 4.6. QTouch button connections.
Pin on SAM4L
PC13
PC14
4.2.2

Crystals

The SAM4L Xplained Pro kit contains two crystals that can be used as clock sources for the SAM4L device.
Each crystal has a cut-strap next to it that can be used to measure the oscillator safety factor. This is done by
cutting the strap and adding a resistor across the strap. More information about oscillator allowance and safety
factor can be found in appnote
1
http://www.atmel.com/images/doc8333.pdf
SAM4L pin Function
PA20 SEG20
PB07 SEG21
PB06 SEG22
PA08 SEG23
PC24 SEG24
PC25 SEG25
PC26 SEG26
PC27 SEG27
PC28 SEG28
PC29 SEG29
PC30 SEG30
PC31 SEG31
PB12 SEG32
PB13 SEG33
PA21 SEG34
PA22 SEG35
PB14 SEG36
PB15 SEG37
PA23 SEG38
PA24 SEG39
- Not Connected
- Not Connected
- VCC_P3V3
- GND
PC05 Backlight
- ID
- GND
1
AVR4100 .
Shared functionality
EXT3 and EXT4
EXT3
EXT1
EXT2 and EXT3
EXT2 and EXT3
EXT1 and EXT2
EXT1
EXT1
EXT1 and EXT2
EXT1 and EXT2
EXT2, EXT3 and EXT4
EXT2, EXT3 and EXT4
EXT1
EXT1
EXT2
Function
CATB_SENSE15
CATB_DIS
Atmel SAM4L Xplained Pro [USER GUIDE] 14
42074A-MCU-02/13