Jumper Description; Ldo/Buck Jumper; Ldo Jumper; Vlcd_A And Vlcd_Bc Jumpers - Atmel SAM4L Xplained Pro User Manual

Table 4-13 DGI Interface Connections When Using USART
Pin on SAM4L
PC29
PC28
PC31
Table 4-14 DGI Interface Connections When Using TWI
Pin on SAM4L
PA23
PA24
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 SAM4L
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 SAM4L
PB05
PB06
PB07
PB10
4.4.

Jumper Description

The SAM4L 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 the efficiency for this mode. If the power 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.
Function
USART TXD (SAM4L TX line)
USART RXD (SAM4L RX line)
USART CLK
Function
SDA (Data line)
SCL (Clock line)
Atmel SAM4L Xplained Pro [USER GUIDE]
Function
GPIO
GPIO
GPIO
GPIO
Atmel-42074C-SAM4L-Xplained-Pro_User Guide-11/2015
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