Figure 4-3. SAM L22 Xplained Pro XAM Implementation Block Diagram
Target
Regulator
Current measurement
bypass jumper selection
Target MCU
Target
Peripherals
Xplained Pro MCU power
measurement jumper
Xplained Pro Analog
Module (XAM)
On the SAM L22 Xplained Pro the XAM can be used in four configurations:
1.
No current measurement or external MCU current measurement
: The XAM is bypassed and
thus the MCU and peripherals are supplied directly by the regulator. Set both jumpers in the
"BYPASS" position. In this configuration it is also possible to connect external measurement tools
on the Xplained Pro MCU power measurement header to measure MCU current directly instead of
using the XAM.
2.
MCU current measurement
: The XAM measures only the MCU current while the peripherals are
supplied directly by the regulator. For this configurations place the jumper for "I/O" (peripherals) into
the "BYPASS" position and the "MCU" into the "MEASURE" position.
3.
Peripherals measurement
: The XAM measures only the peripherals current while the MCU is
directly supplied by the regulator. For this configuration place the jumper for "MCU" into the
"BYPASS" position and the "I/O" jumper into the "MEASURE" position.
4.
MCU and peripherals measurement
: In this configuration both MCU and peripherals are
measured by the XAM. Place both jumpers on "I/O" and "MCU" headers in the "MEASURE"
position.
4.5.
Kit Modifications
SAM L22 Xplained Pro has several resistors that can be used to disconnect I/O pins of the
ATSAML22N18A from connectors and on-board ICs and to disconnect power signals.
Atmel SAM L22 Xplained Pro [USER GUIDE]
Atmel-42474B-SAM-L22-Xplained-Pro_User Guide-12/2015
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