St-Link Select Jumper; Table 7. Tag Connector Pinout; Table 8. St-Link Select Jumper; Figure 10. Tc2050-Idc-Nl Cable - STMicroelectronics B-L462E-CELL1 User Manual

Connector
CN3
8.4

ST-LINK select jumper

The ST-LINK select connector is a 4-pin, 2.54-mm pitch male connector. It is used to decide which target the
ST-LINK is connected to.
Connector
CN4
UM2743 - Rev 1
Figure 10.
Table 7. Tag connector pinout
Pin
Pin name
number
1 1.8V
2 TMS/SWDIO
3 GND
4 TCK/SWCLK
5 GND
6 SWO
7 NC
8 NC
9 NC
10 RESET#
Table 8. ST-LINK select jumper
Pin
Pin name
number
1 T_JTCK
2 TCK/SWCLK
3 T_JTMS
4 TMS/SWDIO
TC2050-IDC-NL cable
Signal name
1V8
TMS/SWDIO
-
TCK/SWCLK
-
SWO
-
-
-
RESET#
Signal name
T_JTCK
TCK/SWCLK
T_JTMS
TMS/SWDIO
UM2743
ST-LINK select jumper
STM32L
Function
4 pin
- Power
PA13 Serial wire data I/O
- Ground
PA14 Serial wire clock
- Ground
PB3 Serial wire output
- -
- -
- -
NRST RESET
STM32L
Function
4 pin
-
When CN4 [1-2] and
PA14
CN4 [3-4] are ON,
the Discovery board
-
is selected.
PA13
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