
STM32 pin
Signal name
Pin name
Pin
Pin
Pin name
Signal name
STM32 pin
USB_DP2
USB_DP2
D+
A6
B7
D-
USB_DM2
USB_DM2
USB_DM2
USB_DM2
D-
A7
B6
D+
USB_DP2
USB_DP2
-
-
SBU1
A8
B5
CC2
UCPD_CC2
PB15
-
VBUS_C/
5V_USB_C
VBUS
A9
B4
VBUS
VBUS_C/
5V_USB_C
-
-
-
RX2-
A10
B3
TX2-
-
-
-
-
RX2+
A11
B2
TX2+
-
-
-
GND
GND
A12
B1
GND
GND
-
6.14
Jumper configuration
The jumper default positions are explained in
Table 4. Default jumper configuration
, and shown in
. The
below explains the other jumper settings and configuration.
Table 15.
Jumper configuration
Jumper / CN
Definition
Comment
CN4
T_SWCLK
T_SWDIO
ON [1-2] ON
[3-4]
ST-LINK/V2-1 enable for on-board MCU debugger
OFF
ST-LINK/V2-1 functions enabled for external CN5
connector
JP2
STLK_RST
ON [1-2]
use to reset ST-LINK MCU
OFF
Normal mode
JP3
T_NRST
ON
ST-LINK able to reset target MCU
OFF
ST-LINK not able to reset target MCU configuration
to use when CN5 is used with external application
JP4
VDD_MCU voltage selection
ON [1-2]
VDD_MCU voltage selection = 3V3
ON [2-3]
VDD_MCU voltage selection = 1V8
OFF
No VDD_MCU power supply (forbidden)
JP5
IDD measurement
ON [1-2]
VDD =3V3
OFF
U6 LDO not used. External 3V3 source can be
connected on pin 2 (ULPBench probe as an
example)
JP6
5V Power selection
ON [1-2]
5V from ST-LINK
ON [3-4]
5V from ARDUINO
®
VIN 7 to 12 V
ON [5-6]
5V from 5V_EXT
ON [7-8]
5V from user USB_UCPD (USB Type-C
™
)
ON [9-10]
5V from USB_CHGR
OFF
No 5V Power source, configuration when external
3V3 is used
CN13 / CN14
GND
NA
GND probe
1. Default jumper state in bold.
UM2581
Jumper configuration
UM2581
-
Rev 2
page 29/48