Atmel Xplained Pro Evaluation Kit ATSAMD20-XPRO ATSAMD20-XPRO Data Sheet
Product codes
ATSAMD20-XPRO
Atmel SAM D20 Xplained Pro [USER GUIDE]
42102C-MCU-02/2014
7
Data Field
Data Type
Example Content
Minimum Voltage [mV]
uint16_t
3000
Maximum Voltage [mV]
uint16_t
3600
Maximum Current [mA]
uint16_t
30
3.3
Power Supply
The SAM D20 Xplained Pro kit can be powered either by USB or by an external power source through the 4-
The available power sources and specifications are listed in
Table 3-3. Power Sources for SAM D20 Xplained Pro
Power input
Voltage requirements
Current requirements
Connector marking
External power
4.3V to 5.5V
Recommended
minimum is 500mA
to be able to provide
enough current
for extentions 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)
500 mA (according to
USB spec)
DEBUG 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
3.3.1
Measuring SAM D20 Power Consumption
As part of an evaluation of the SAM D20 it can be of interest to measure its power consumption. Because the
device has a separate power plane (VCC_MCU_P3V3) on this board it is possible to measure the current
consumption by measuring the current that is flowing into this plane. The VCC_MCU_P3V3 plane is connected
via a jumper to the main power plane (VCC_TARGET_P3V3) and by replacing the jumper with an ammeter it is
possible to determine the current consumption. To locate the current measurement header, refer to
.
Warning
Do not power the board without having the jumper or an ammeter mounted. This can cause the
SAM D20 to be powered through its I/O pins and cause undefined operation of the device.
3.4
Standard 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 headers. Xplained Pro MCU boards
have male headers while Xplained Pro extensions have their female counterparts. Note that all pins are not
always connected. However, all the connected pins follow the defined pin-out described in
Xplained Pro extensions to Xplained Pro MCU boards and to access the pins of the target MCU on Xplained
Pro MCU board directly.
Table 3-4. Xplained Pro Extension Header
Pin number
Name
Description
1
ID
Communication line to the ID chip on extension board.