ST B-L4S5I-IOT01A - Tag Connector CN5

7.2 Tag connector CN5
The Tag connector is implemented on the B-L4S5I-IOT01A Discovery kit for the IoT node. The Tag connector is a
10-pin footprint supporting SWD mode, which is shared with the same signals as the ST-LINK. The TC2050-IDC-
NL cable is used to link ST-LINK and Tag connector on the B-L4S5I-IOT01A Discovery kit for the IoT node so that
the STM32L4+ can be easily programmed and debugged without any extra accessory.
Figure 17. Tag connector
Figure 18. TC2050-IDC-NL cable
Table 7. Tag connector pinout
Connector
Pin
number
Pin name Signal name
STM32L
4+ pin
Function
CN5
1 3.3V 3V3_ST_LINK - Power
2 SWD SYS_JTMS-SWDIO PA13 Serial wire data I/O
3 GND - - Ground
4 SWCLK SYS_JTCK-SWCLK PA14 Serial wire clock
5 GND - - Ground
6 SWO STLINK_JTDO_SWO PB3 Serial wire output
7 NC - - -
8 NC - - -
9 NC - - -
10 NRST STM_NRST NRST RESET
UM2708
Tag connector CN5
UM2708 - Rev 1
page 28/43