Table 4-13. DGI Interface Connections When Using USART
Pin on SAM4L8
Function
PC29
USART TXD (SAM4L8 TX line)
PC28
USART RXD (SAM4L8 RX line)
PC31
USART CLK
Table 4-14. DGI Interface Connections When Using TWI
Pin on SAM4L8
Function
PA23
SDA (Data line)
PA24
SCL (Clock line)
Four GPIO lines are connected to the Embedded Debugger. The EDBG can monitor these lines and time
stamp pin value changes. This makes it possible to accurately time stamp events in the SAM4L8
application code. For further information on how to configure and use the GPIO monitoring features see
the EDBG user guide.
Table 4-15. GPIO Lines Connected to the EDBG
Pin on SAM4L8
Function
PB05
GPIO
PB06
GPIO
PB07
GPIO
PB10
GPIO
4.4.
Jumper Description
The SAM4L8 Xplained Pro contains five jumpers that can be used to adjust the functionality of the board.
You can locate the jumpers in kit overview picture at the start of the user guide. Here is a description of
the jumpers.
Related Links
Kit Overview
on page 4
4.4.1.
LDO/BUCK Jumper
This jumper selects the power mode of the internal voltage regulator in the target MCU. It can be either
LDO mode, which is a linear regulator or BUCK mode, which is a switch mode regulator. If LDO mode is
selected, the LDO jumper should be mounted as well.
4.4.2.
LDO Jumper
This jumper should be mounted when the power mode jumper is set to LDO mode. It will bypass the
BUCK mode inductor and increase efficiency for this mode. If the poewr mode jumper is set to BUCK
mode, this jumper needs to be removed to make it work.
4.4.3.
VLCD_A and VLCD_BC Jumpers
When the Segment LCD is not used, these jumpers needs to be mounted to power the pins used for
segment LCD in GPIO mode.
Atmel SAM4L8 Xplained Pro [USER GUIDE]
Atmel-42103B-SAM4L8-Xplained-Pro_User Guide-04/2016
21
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
