UM2502 Rev 1

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UM2502

Board connectors

26

9.1.3

STDC14 for STLINK-V3MINI (STM32 JTAG/SWD and VCP)

The STDC14 CN5 connector allows the connection to a STM32 target by means of the

JTAG or SWD protocol, respecting (from pin 3 to pin 12) the ARM10 pinout (Arm Cortex

Debug connector). But it also advantageously provides two UART signals for the Virtual

COM port. The related pinout for the STDC14 connector is listed inTable 6.

2. Connect to GND on target, may be used by STLINK-V3MODS for detection of connection.

3. SWO is optional, required only for Serial Wire Viewer (SWV) trace.

4. TX signals are outputs for STLINK-V3MODS, inputs for target.

5. Do not connect on target.

6. NC means not required for SWD connection.

7. Input for STLINK-V3MODS.

Table 6. STDC14 connector pinout CN5

STDC14 Pin #

ARM10 Pin

#

Pin description

Type

1-

1. Do not connect on target.

-

2-

Reserved(1)

-

31

2. Input for STLINK-V3MINI.

I

4

2

T_JTMS/T_SWDIO

O

53

GND

S

6

4

T_JCLK/T_SWCLK

O

75

GND

S

86

3. SWO is optional, required only for Serial Wire Viewer (SWV) trace.

I

9

7

T_JCLK

O

10

8

4. NC means not required for SWD connection.

O

11

9

5. Connect to GND on target, may be used by STLINK-V3MINI for detection of connection.

I

12

10

T_NRST

O

13

-

T_VCP_RX

O

14

-

T_VCP_TX

I