Atmel Xplained Pro Evaluation Kit ATSAMD20-XPRO ATSAMD20-XPRO Hoja De Datos
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ATSAMD20-XPRO
Atmel SAM D20 Xplained Pro [USER GUIDE]
42102C-MCU-02/2014
12
Pin on SAM D20
Function
PB16
SERCOM5 PAD[0] SPI MISO (Master In, Slave Out)
PB22
SERCOM5 PAD[2] SPI MOSI (Master Out, Slave in)
PB23
SERCOM5 PAD[3] SPI SCK (Clock Out)
Table 4-10. DGI Interface Connections when using I²C
Pin on SAM D20
Function
PA08
SERCOM2 PAD[0] SDA (Data line)
PA09
SERCOM2 PAD[1] 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 SAM D20 application
.
Table 4-11. GPIO Lines Connected to the EDBG
Pin on SAM D20
Function
PA27
GPIO0
PA28
GPIO1
PA20
GPIO2
PA21
GPIO3
4.3.4
External Programming and Debugging
The SAM D20 Xplained Pro features a Cortex
®
Debug Connector (10-pin) for programming and debugging an
external target. The connector is limited to the SWD interface and is intended for in-system programming and
debugging of SAM D20 devices in the users final products.
The debug connector is connected to the onboard EDBG through level shifters and switches. When an external
The debug connector is connected to the onboard EDBG through level shifters and switches. When an external
target voltage is detected, the EDBG will switch the SWD interface from the onboard target device to the
external debug connector and the green LED next to the connector will be lit. The voltage of the external target
must be between 1.6V and 5.0V.
Note
This connector can't be used for attaching an external debug unit for programming and debugging
the onboard device.
Table 4-12. Cortex Debug Connector
Pin on connecor
Specification
Function implemented
1
VCC
VCC
2
SWDIO / TMS
SWDIO
3
GND
GND
4
SWDCLK / TCK
SWDCLK
5
GND
GND
6
SWO / TDO
NC
7
KEY
NC
8
NC / TDI
NC
9
GNDDetect
GND
10
nRESET
nRESET