ST NUCLEO-F303RE - Figure 9. Using ST-LINK;V2-1 to Program the STM32 on an External Application; Table 5. Debug Connector CN4 (SWD)

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UM1724 Hardware layout and configuration
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Figure 9. Using ST-LINK/V2-1 to program the STM32 on an external application
Table 5. Debug connector CN4 (SWD)
Pin CN4 Designation
1 VDD_TARGET VDD from application
2 SWCLK SWD clock
3 GND ground
4 SWDIO SWD data input/output
5 NRST RESET of target STM32
6 SWO Reserved
MS34379V2
CN2 jumpers OFF
CN4
SWD connector