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MI910 User’s Manual 19
F_USB1: USB0/USB1 Connector
Signal Name Pin Pin Signal Name
Vcc 1 2 Vcc
D0- 3 4 D1-
D0+ 5 6 D1+
Ground 7 8 Ground
NC 9 10 Ground
JP1, JP2, JP3: RS232/422/485 (COM2) Selection
COM1 is fixed for RS-232 use only.
COM2 is selectable for RS232, RS-422 and RS-485.
The following table describes the jumper settings for COM2 selection.
COM2
Function
RS-232 RS-422 RS-485
Jumper
Setting
(pin closed)
JP3:
1-2
JP2:
3-5 & 4-6
JP1:
3-5 & 4-6
JP3:
3-4
JP2:
1-3 & 2-4
JP1:
1-3 & 2-4
JP3:
5-6
JP2:
1-3 & 2-4
JP1:
1-3 & 2-4
COM2 is jumper selectable for RS-232, RS-422 and RS-485.
Pin # Signal Name
RS-232 R2-422 RS-485
1 DCD TX- DATA-
2 RX TX+ DATA+
3 TX RX+ NC
4 DTR RX- NC
5 Ground Ground Ground
6 DSR RTS- NC
7 RTS RTS+ NC
8 CTS CTS+ NC
9 RI CTS- NC
10 NC NC NC