The ranges are automatically switched by the XAM to achieve the best measurement results and the
currently active range is visualized in the Data Visualizer front-end tool. The maximum voltage drop over
the shunt resistor is 100 mV, and the XAM switches the range automatically before reaching this limit.
4.3 Hardware Identification System
All Xplained Pro extension boards come with an identification chip (ATSHA204A CryptoAuthentication
™
chip) to uniquely identify the boards that are connected to the Xplained Pro evaluation kit. This chip
contains information that identifies the extension with its name and some extra data. When an Xplained
Pro extension is connected to an Xplained Pro evaluation kit, the information is read and sent to Atmel
Studio. The following table shows the data fields stored in the ID chip with example content.
Table 4-3. Xplained Pro ID Chip Content
Data Field Data Type Example Content
Manufacturer ASCII string Atmel'\0'
Product Name ASCII string Segment LCD1 Xplained Pro'\0'
Product Revision ASCII string 02'\0'
Product Serial Number ASCII string 1774020200000010’\0’
Minimum Voltage [mV] uint16_t 3000
Maximum Voltage [mV] uint16_t 3600
Maximum Current [mA] uint16_t 30
4.4 Power Sources
The SAM E54 Xplained Pro kit can be powered by several power sources, as listed in the table below.
Table 4-4. Power Sources for SAM E54 Xplained Pro
Power Source Voltage Requirements Current Requirements Connector Marking
External Power 5V ±2% (±100mV) for
USB host operation.
4.3V to 5.5V if a USB
host operation is not
required.
In USB host applications
a minimum of 1A is
recommended to supply
the kit and the USB
device.
Maximum recommended
current is 2A.
PWR
Embedded debugger
USB
4.4V to 5.25V (according
to USB spec.)
500 mA (according to
USB spec.)
DEBUG USB
Target USB 4.4V to 5.25V (according
to USB spec.)
500 mA (according to
USB spec.)
TARGET USB
The kit automatically detects which power sources are available and chooses which one to use according
to the following priority:
1. External power.
SAM E54 Xplained Pro
© 2017 Microchip Technology Inc.
DS70005321A-page 12
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