Atmel SAM4L Xplained Pro Starter Kit Atmel ATSAM4L-XSTK ATSAM4L-XSTK Data Sheet
Product codes
ATSAM4L-XSTK
Atmel SAM4L Xplained Pro [USER GUIDE]
42074B-MCU-05/2013
16
4.3.3
Atmel Data Gateway Interface
The Embedded Debugger features an Atmel Data Gateway Interface (DGI) by using either a synchronous
USART or TWI port. The DGI can be used to send a variety of data from the SAM4L to the host PC. For further
information on how to use the DGI interface see
Table 4-13. DGI interface connections when using USART.
Pin on SAM4L
Function
PC29
USART TXD (SAM4L TX line)
PC28
USART RXD (SAM4L RX line)
PC31
USART CLK
Table 4-14. DGI interface connections when using TWI.
Pin on SAM4L
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 SAM4L application
.
Table 4-15. GPIO lines connected to the EDBG.
Pin on SAM4L
Function
PB05
GPIO
PB06
GPIO
PB07
GPIO
PB10
GPIO
4.4
Jumper description
The SAM4L Xplained Pro contains five jumpers that can be used to adjust the functionality of the board. You
of the jumpers.
4.4.1
LDO/BUCK Jumper
This jumper selelcts 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.
4.4.4
VCC_MCU Jumper
This jumper connects VCC to the target MCU. This jumper can be replaced with an ampere meter to measure
the current used by the target device. Remeber to mount this jumper or an ampere meter to make the target
MCU work properly.