Using St-Link/V2-1 To Program/Debug An External Stm32 Application; Board; Table 4. Debug Connector Cn4; Figure 7. Cn1, Cn3 (Off), Cn4 Connections - STMicroelectronics STM32L476 User Manual

UM1879
10.1.4

Using ST-LINK/V2-1 to program/debug an external STM32 application

board

To use the ST-LINK/V2-1 to program the STM32 on an external application board (out of the
STM32L476VGT6 on board), remove the two jumpers from CN3 as shown in
red, and connect the board to the CN4 software debug connector according to
Make sure the jumpers JP6.3V3, and JP5.OFF are set.
JP3, must be ON if CN4 pin 5 (NRST) is used in the external application board.
Pin
1
2
3
4
5
6

Table 4. Debug connector CN4

CN4
Vapp
SWLCK
GND
SWDIO
NRST
SWO

Figure 7. CN1, CN3 (OFF), CN4 connections

UM1879 Rev 4
Hardware layout and configuration
Designation
VDD from application
SWD clock
Ground
SWD data input/output
RESET of target MCU
Reserved
Figure 7 in
Table 4.
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