ST ST-LINK/V2 - Table 5. JTAG;SWD Cable Connections on STLINK-V2-ISOL

UM1075 Rev 10 13/20
UM1075 Hardware configuration
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Table 5. JTAG/SWD cable connections on STLINK-V2-ISOL
Pin
no.
ST-LINK/V2
connector (CN3)
ST-LINK/V2
function
Target connection
(JTAG)
Target connection
(SWD)
1
VAPP Target VCC MCU VDD
(1)
1. The power supply from the application board is connected to the ST-LINK/V2 debugging and programming
board to ensure signal compatibility between the boards.
MCU VDD
(1)
2
3 TRST JTAG TRST NJTRST GND
(2)
2. Connect to GND for noise reduction on the ribbon.
4 Not connected Not connected Not connected Not connected
5TDI JTAG TDO JTDI GND
(2)
6 Not connected Not connected Not connected Not connected
7 TMS_SWDIO JTAG TMS, SW IO JTMS SWDIO
8 Not connected Not connected Not connected Not connected
9 TCK_SWCLK JTAG TCK, SW CLK JTCK SWCLK
10 Not used
(5)
Not used
(5)
Not connected
(5)
Not connected
(5)
11 Not connected Not connected Not connected Not connected
12 GND GND GND
(3)
3. At least one of these pins must be connected to the ground for correct behavior. It is recommended to
connect all of them.
GND
(3)
13 TDO_SWO JTAG TDI, SWO JTDO TRACESWO
(4)
4. Optional: For Serial Wire Viewer (SWV) trace.
14 Not used
(5)
5. Used by SWIM on ST-LINK/V2-ISOL (see Table 3).
Not used
(5)
Not connected
(5)
Not connected
(5)
15 NRST NRST NRST NRST
16 Not connected Not connected Not connected Not connected
17 Not connected Not connected Not connected Not connected
18 GND GND GND
(3)
GND
(3)
19 Not connected Not connected Not connected Not connected
20 GND GND GND
(3)
GND
(3)