Trace Connector

ATSAMV71Q21 supports 4-bit parallel trace. SAM V71 Xplained Ultra implements a CoreSight 20 20-pin, 50-mil keyed connector (pin seven is removed).

To use the trace functionality an external debugger with trace support and CoreSight 20 pin out has to be used. Table 1 shows the connections on the kit.

Info: Several of the trace signals are shared with Ethernet signals, this means that there is no trace support if Ethernet is used in an application.
Table 1. CoreSight 20 Trace Connector
Pin number SAM V71 pin Function Shared functionality
1 [VTREF] - VCC_TARGET_P3V3  
2 [TMS/SWDIO] PB06 SWDIO EDBG SWD
3 [GND] - Ground  
4 [TCK/SWCLK] PB07 SWCLK EDBG SWD
5 [GND] - Ground  
6 [TDO/SWO] PB05 TRACESWO MediaLB and EDBG SWD
7 [KEY] - -  
8 [TDI] - -  
9 [GND] - Ground  
10 [nSRST] NRST NRST Shield and EDBG
11 [NC] - -  
12 [RTCK/TRACECLK] PD08 TRACECLK Ethernet
13 [NC] - -  
14 [SWO/D0] PD04 TRACED0 Ethernet
15 [GND] - Ground  
16 [ntRST/D1] PD05 TRACED1 Ethernet
17 [GND] - Ground  
18 [DBGRQ/D2] PD06 TRACED2 Ethernet
19 [GND] - Ground  
20 [DBGACK/D3] PD07 TRACED3 Ethernet
Parent topic: Connectors