Datasheet

983
Atmel | SMART SAM D21 [DATASHEET]
Atmel-42181C–SAM-D21_Datasheet–07/2014
38.7 Programming and Debug Ports
For programming and/or debugging the SAM D21 the device should be connected using the Serial Wire Debug, SWD,
interface. Currently the SWD interface is supported by several Atmel and third party programmers and debuggers, like
the SAM-ICE, JTAGICE3 or SAM D21 Xplained Pro (SAM D21 evaluation kit) Embedded Debugger.
Refer to the SAM-ICE, JTAGICE3 or SAM D21 Xplained Pro user guides for details on debugging and programming
connections and options. For connecting to any other programming or debugging tool, refer to that specific programmer
or debugger’s user guide.
The SAM D21 Xplained Pro evaluation board for the SAM D21 supports programming and debugging through the
onboard embedded debugger so no external programmer or debugger is needed.
38.7.1 Cortex Debug Connector (10-pin)
For debuggers and/or programmers that support the Cortex Debug Connector (10-pin) interface the signals should be
connected as shown in Figure 38-10 with details described in Table 38-9.
Figure 38-10.Cortex Debug Connector (10-pin)
Table 38-9. Cortex Debug Connector (10-pin)
Table 38-8. Equivalent Internal Pin Capacitance
Symbol Value Description
C
XIN32
3.05pF Equivalent internal pin capacitance
C
XOUT32
3.29pF Equivalent internal pin capacitance
Header Signal Name Description
SWDCLK Serial wire clock pin
SWDIO Serial wire bidirectional data pin
1
VTref
GND
GND
NC
NC
SWDIO
SWDCLK
NC
NC
nRESET
Cortex Debug Connector
(10-pin)
GND
SWDIO
SWCLK
RESET
V
DD