3.3 Power Sources

The SAM V71 Xplained Ultra kit can be powered by several power sources listed in Table 3-3.

Table 3-3. Power Sources for SAM V71 Xplained Ultra
Power inputVoltage requirementsCurrent requirementsConnector marking
External power5V ±2% (±100mV) for USB host operation. 4.3V to 5.5V if USB host operation is not required.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.PWR
Embedded debugger USB4.4V to 5.25V (according to USB spec.)500mA (according to USB spec.)DEBUG USB
Target USB4.4V to 5.25V (according to USB spec.)500mA (according to USB spec.)TARGET USB
External jack inputKit specificKit specificVIN

The kit will automatically detect which power sources are available and choose which one to use according to the following priority:

  1. External jack input.
  2. External power.
  3. Embedded Debugger USB.
  4. Target USB.
Info: External power is required when 500mA from a USB connector is not enough to power the board with possible extension boards. A connected USB device in a USB host application might easily exceed this limit.