Atmel SAM4S Xplained Pro Starter Kit Atmel ATSAM4S-XSTK ATSAM4S-XSTK Data Sheet
Product codes
ATSAM4S-XSTK
Atmel SAM4S Xplained Pro [USER GUIDE]
Atmel-42075B-MCU-Atmel SAM4S Xplained Pro-USER GUIDE-03/2013
17
Pin on SAM4S
Function
PB2
UART RXD (SAM4S RX line)
4.3.3
Atmel Data Gateway Interface
The Embedded Debugger features an Atmel Data Gateway Interface (DGI) by using either a SPI or TWI port.
The DGI can be used to send a variety of data from the SAM4S to the host PC. For further information on how
to use the DGI interface see
Table 4.15. DGI interface connections when using SPI
Pin on SAM4S
Function
PA5
Slave select (SAM4S is Master)
PA12
SPI MISO (Master In, Slave Out)
PA13
SPI MOSI (Master Out, Slave in)
PA14
SPI SCK (Clock Out)
Table 4.16. DGI interface connections when using TWI
Pin on SAM4S
Function
PA3
SDA (Data line)
PA4
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 SAM4S application
.
Table 4.17. GPIO lines connected to the EDBG
Pin on SAM4S
Function
PA6
GPIO0
PA22
GPIO1
PA24
GPIO2
PA25
GPIO3