UM1879 Rev 4
15/41
UM1879
Hardware layout and configuration
40
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
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.
Figure 7. CN1, CN3 (OFF), CN4 connections
Table 4. Debug connector CN4
Pin
CN4
Designation
1
Vapp
VDD from application
2
SWLCK
SWD clock
3
GND
Ground
4
SWDIO
SWD data input/output
5
NRST
RESET of target MCU
6
SWO
Reserved
