Table 3-3. Power Sources for SAMHA1G16A Xplained Pro
Power input
Voltage requirements
Current requirements
Connector marking
External power
5V ±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
USB
4.4V to 5.25V (according
to USB spec.)
500mA (according to
USB spec.)
DEBUG USB
External HV input
6V to 28V
Voltage regulator in SBC
is specified for up to
85mA. This input also
supplies the LIN Bus
and all the other
features of the SBC. It's
recommended to use at
least 500mA.
VS and GND on
Connector HV
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.
3. External HV input
Note:
The selection for the supply of the Target MCU has a separate connector. The above priority
selects which supply is used to power the EDBG and the VCC_P3V3_CON.
Info:
External power is required when 500mA from a USB connector is not enough to power
the board with possible extension boards.
3.4.
Xplained Pro Headers and Connectors
3.4.1.
Xplained Pro Standard Extension Header
All Xplained Pro kits have one or more dual row, 20-pin, 100mil extension header. Xplained Pro MCU
boards have male headers, while Xplained Pro extensions have their female counterparts. Note that all
pins are not always connected. All connected pins follow the defined pin-out description in the table
below.
Atmel SAMHA1G16A Xplained Pro [USER GUIDE]
Atmel-00001-SAMHA1G16A-Xplained-Pro_User Guide-11/2014
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