Atmel SAM L22 Xplained Pro, Руководство пользователя

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Cortex Debug
Connector pin Pin / Net Function Shared functionality
3 GND Ground
4 PA30 SWD clock signal EDBG SWD
5 GND Ground
6 - -
7 - -
8 - -
9 GND Ground
10 RESETN Target reset signal Shield , Shield2 , and
EDBG
4.2.6. Current Measurement Header
An angled 1x2, 100mil pin-header marked with MCU current measurement is located at the upper edge of
the SAM L22 Xplained Pro. All power to the ATSAML22N18A is routed through this header. To measure
the power consumption of the device remove the jumper and replace it with an ammeter.
Caution: Removing the jumper from the pin-header while the kit is powered may cause the
ATSAML22N18A to be powered through its I/O pins. This may cause permanent damage to the
device.
4.3. Peripherals
4.3.1. Crystal
The SAM L22 Xplained Pro kit contains a 32.768kHz crystal that can be used as clock source for the
SAM L22 device. The 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 the
AVR4100 application note from Atmel.
Table 4-12. External 32.768kHz Crystal
SAM L22 pin Function
PA00 XIN32
PA01 XOUT32
4.3.2. Mechanical Buttons
SAM L22 Xplained Pro contains two mechanical buttons. One button is the RESET button connected to
the SAM L22 reset line and the other is a generic user configurable button. When a button is pressed it
will drive the I/O line to GND.
Atmel SAM L22 Xplained Pro [USER GUIDE]
Atmel-42474B-SAM-L22-Xplained-Pro_User Guide-12/2015
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