Hardware Identification System; Power Sources - Atmel SAM4L Xplained Pro User Manual

3.2.

Hardware Identification System

All Xplained Pro compatible extension boards have an Atmel ATSHA204 CryptoAuthentication
mounted. 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 MCU board the information is read and
sent to Atmel Studio. The Atmel Kits extension, installed with Atmel Studio, will give relevant information,
code examples, and links to relevant documents.
shows the data fields stored in the ID chip with example content.
Table 3-2 Xplained Pro ID Chip Content
Data field
Manufacturer
Product Name
Product Revision
Product Serial Number
Minimum Voltage [mV]
Maximum Voltage [mV]
Maximum Current [mA]
3.3.

Power Sources

The SAM4L Xplained Pro kit can be powered by several power sources listed in
Sources for SAM4L Xplained Pro
Table 3-3 Power Sources for SAM4L Xplained Pro
Power input
External power
Embedded debugger
USB
The kit will automatically detect which power sources are available and choose which one to use
according to the following priority:
1. External power.
2. Embedded Debugger USB.
Table 3-2 Xplained Pro ID Chip Content
Data type
ASCII string
ASCII string
ASCII string
ASCII string
uint16_t
uint16_t
uint16_t
on page 10.
Voltage requirements
5V ±2% (±100mV) for
USB host operation.
4.3V to 5.5V if USB host
operation is not
required.
4.4V to 5.25V (according
to USB spec.)
Example content
Atmel'\0'
Segment LCD1 Xplained Pro'\0'
02'\0'
1774020200000010'\0'
3000
3600
30
Current requirements
Recommended
minimum is 1A to be
able to provide enough
current for connected
USB devices and the
board itself.
Recommended
maximum is 2A due to
the input protection
maximum current
specification.
500mA (according to
USB spec.)
Atmel SAM4L Xplained Pro [USER GUIDE]
Atmel-42074C-SAM4L-Xplained-Pro_User Guide-11/2015
™
chip
on page 10
Table 3-3 Power
Connector marking
PWR
DEBUG USB
10