6.3.3
Using an external debug tool to program and debug the on-board STM32
There are two basic ways to support an external debug tool:
1.
Keep the embedded STLINK-V3E running. Power on the STLINK-V3E at first until the COM LED turns red.
Then connect the external debug tool through the CN4 STDC14/MIPI-10 debug connector
2.
Set the embedded STLINK-V3E in hig-impedance state: when jumper JP1 (STLK_RST) is ON, the
embedded STLINK-V3E is in RESET state and all GPIOs are in high-impedance; then, connect the external
debug tool to debug connector CN4.
Figure 8.
Connecting an external debug tool to program the on-board STM32G4
Table 5.
MIPI10 / STDC14 debug connector (CN4)
MIPI10 pin
STDC14 pin
CN4
Function
-
1
NC
Reserved
-
2
NC
Reserved
1
3
3V3
Target VCC
2
4
T_SWDIO
Target SWDIO using SWD protocol or Target JTMS (T_JTMS) using
JTAG protocol
3
5
GND
Ground
4
6
T_SWCLK
Target SWCLK using SWD protocol or Target JCLK (T_JCLK) using
JTAG protocol
5
7
GND
Ground
6
8
T_SWO
Target SWO using SWD protocol or Target JTDO (T_JTMS) using
JTAG protocol
7
9
NC
Not connected
UM2505
Embedded STLINK-V3E
UM2505
-
Rev 2
page 12/43
