目录
1. ST-Link接口定义
2. ULINK2接口定义
为方便查阅，将ST-LINK和ULINK的JTAG和SWD接口定义总结如下：
1. ST-Link接口定义
| Pin no. | ST-LINK/V2 connector (CN3) | ST-LINK/V2 function | Target connection (JTAG) | Target connection (SWD) |
| 1 | VAPP | Target VCC | MCU VDD(1) | MCU VDD(1) |
| 2 | ||||
| 3 | TRST | JTAG TRST | JNTRST | GND(2) |
| 4 | GND(3) | GND(3) | GND(3)(4) | GND(3)(4) |
| 5 | TDI | JTAG TDO | JTDI | GND(2) |
| 6 | GND(3) | GND(3) | GND(3)(4) | GND(3)(4) |
| 7 | TMS_SWDIO | JTAG TMS, SW IO | JTMS | SWDIO |
| 8 | GND(3) | GND(3) | GND(3)(4) | GND(3)(4) |
| 9 | TCK_SWCLK | JTAG TCK, SW CLK | JTCK | SWCLK |
| 10 | GND(5) | GND(5) | GND(4)(5) | GND(4)(5) |
| 11 | Not connected | Not connected | Not connected | Not connected |
| 12 | GND | GND | GND(4) | GND(4) |
| 13 | TDO_SWO | JTAG TDI, SWO | JTDO | TRACESWO(6) |
| 14 | GND(5) | GND(5) | GND(4)(5) | GND(4)(5) |
| 15 | NRST | NRST | NRST | NRST |
| 16 | GND(3) | GND(3) | GND(3)(4) | GND(3)(4) |
| 17 | Not connected | Not connected | Not connected | Not connected |
| 18 | GND | GND | GND(4) | GND(4) |
| 19 | VDD(3) | VDD (3.3 V)(3) | Not connected | Not connected |
| 20 | GND | GND | GND(4) | GND(4) |
1. The power supply from the application board is connected to the ST-LINK/V2 debugging and programming board to ensure signal compatibility between the boards.
2. Connect to GND for noise reduction on the ribbon.
3. Available on ST-LINK/V2 only, not connected on ST-LINK/V2-ISOL.
4. At least one of these pin must be connected to the ground for correct behavior, it is recommended to connecting all of them.
5. GND on ST-LINK/V2, used by SWIM on ST-LINK/V2-ISOL (see Table 3).
6. Optional: for Serial Wire Viewer (SWV) trace.
参考文献：um1075-stlinkv2-incircuit-debuggerprogrammer-for-stm8-and-stm32-stmicroelectronics.pdf
2. ULINK2接口定义
| 仿真器端口 | 连接目标板 | 备注 |
| 1. VCC | MCU电源VCC | VCC |
| 2. VCC | MCU电源VCC | VCC |
| 3. TRST | TRST | Test ReSeT/ pin |
| 4. GND | GND或悬空 | |
| 5. TDI | TDI | Test Data In pin |
| 6. GND | GND或悬空 | |
| 7. TMS, SWIO | TMS, SWIO | JTAG:Test Mode State pin ; SWD: Data I/O pin |
| 8. GND | GND或悬空 | |
| 9. TCLK, SWCLK | TMS, SWCLK | JTAG: Test Clock pin ; SWD: Clock pin |
| 10. GND | GND或悬空 | |
| 11. RTCK | RTCK | |
| 12. GND | GND或悬空 | |
| 13. TDO | TDO | Test Data Out pin |
| 14. GND | GND或悬空 | |
| 15. RESET | RESET | RSTIN pin |
| 16. GND | GND或悬空 | |
| 17. NC | NC | |
| 18. GND | GND或悬空 | |
| 19. NC | NC | |
| 20. GND | GND或悬空 |
ULINK2指定的标准接口
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