Cartft FLEETPC-ARM-300 Reference Manual page 20

 A DB9 null modem cable (or adapter) is required when you want to connect console
port to a PC with terminal emulation software such as TeraTerm.
 Turn on PC, run the terminal emulation program (e.g. TeraTerm), and open TeraTerm
COM port.
 Set COM port at Baud Rate 115200, 8 data bits, no parity, 1 stop bit and no flow
control.
 After the above connection/setting, you will see Linux console prompt "$" in the PC
TeraTerm.
Pin Assignment: RS232 IDC Cable and Null Modem Adapter
 Console box header (CN3 on C220 board) pin assignment

 RS232 IDC cable: pin header for DB9
FLEETPC-ARM-300 Series
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