Table 4-4. MCU VCC SEL header
Jumper position
Power
source
Comment
VCC_LINTRX_P3V3 -
VCC_TARGET
LIN SBC
The LIN SBC supplies the microcontroller and the extension
boards. For this setting to work, the SBC must be supplied as
described in chapter
Power Sources
. The voltage regulator
inside the SBC is specified for max 85mA. If extension
boards with high current consumption are attached, this
setting should not be used.
VCC_P3V3 -
VCC_TARGET
500mA
voltage
Regulator
The on board 500mA voltage regulator supplies the
microcontroller and extension boards.
4.1.4.
Cortex Debug Connector
SAMHA1G16A Xplained Pro has a 10-pin 50-mil Cortex
®
Debug Connector that can be used to attach
external debuggers to the ATSAMHA1G16A.
Table 4-5. Cortex Debug Connector
Cortex Debug Connector pin
Pin / Net
Function
1
VCC_TARGET_P3V3
ATSAMHA1G16A voltage
2
SWDIO
SWD data signal
3
GND
Ground
4
SWCLK
SWD clock signal
5
GND
Ground
6
-
-
7
-
-
8
-
-
9
GND
Ground
10
RESETN
Target reset signal
4.2.
Peripherals
4.2.1.
Mechanical buttons
SAMHA1G16A Xplained Pro contains two mechanical buttons. One button is the RESET button
connected to the SAMHA1 reset line and the other is a generic user configurable button. When a button
is pressed it will drive the I/O line to GND.
Note:
There is no pull-up resistor connected to the generic user button. Remember to enable the
internal pull-up in the SAMHA1 to use the button.
Atmel SAMHA1G16A Xplained Pro [USER GUIDE]
Atmel-00001-SAMHA1G16A-Xplained-Pro_User Guide-11/2014
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