SLAU647O July 2015 – April 2020
Table 13 describes the electrical state of every JTAG pin after debug probe power up.
Pin | Name | After Power-Up | When JTAG Protocol is Active | When Spy-Bi-Wire Protocol is Active |
---|---|---|---|---|
1 | TDO/TDI | Hi-Z, pulled up to 3.3 V | In, TDO | In and Out, SBWTDIO |
2 | VCC_TOOL | 3.3 V | Target VCC | Target VCC |
3 | TDI/VPP | Hi-Z, pulled up to 3.3 V | Out, TDI | Hi-Z, pulled up to VCC |
4 | VCC_TARGET | In, external VCC sense | In, external VCC sense | In, external VCC sense |
5 | TMS | Hi-Z, pulled up to 3.3 V | Out, TMS | Hi-Z, pulled up to VCC |
6 | N/C | N/C | N/C | N/C |
7 | TCK | Hi-Z, pulled up to 3.3 V | Out, TCK | Out, SBWTCK |
8 | TEST/VPP | Out, Ground | Out, TEST | Hi-Z, pulled up to VCC |
9 | GND | Ground | Ground | Ground |
10 | N/C | N/C | N/C | N/C |
11 | RST | Out, VCC | Out, RST | Ground |
12 | N/C | N/C | N/C | N/C |
13 | N/C | N/C | N/C | N/C |
14 | N/C | N/C | N/C | N/C |