MSI PRO B650M-A WIFI Manuel D'utilisation page 41

JOCFS1: Safe Boot Jumper
This jumper is used for Safe Boot. Once enabled, the system will boot with default
settings and lower PCIe (from CPU) mode.
JDASH1 : Tuning Controller connector
This connector is used to connect an optional Tuning Controller module.
JCOM1 : Serial Port connector
This connector allows you to connect the optional serial port with bracket.
Normal
(default)
Boot with the saved
BIOS settings.
Pin Signal Name
1 No Pin
3 MCU_SMB_SCL_M
5 VCC5
2
1
Pin Signal Name
1 DCD
3 SOUT
5 Groune
7 RTS
9 RI
39
Enabled
Apply the BIOS default
settings and lower PCIe
(from CPU) mode for
Safe Boot.
2 6
1 5
Pin Signal Name
2 NC
4 MCU_SMB_SDA_M
6 Ground
10
9
Pin Signal Name
2 SIN
4 DTR
6 DSR
8 CTS
10 No pin