Jp2: Voltage Setting For Lvds; Jp6: Clear Cmos Contents; Jp3, Jp4, Jp5: Rs232/422/485 (Com2) Selection - AMD MB500 User Manual

JP2: Voltage Setting for LVDS

Jumper

JP6: Clear CMOS Contents

Note: Disconnect the ATX-power connector from the board before
clearing CMOS.
Jumper

JP3, JP4, JP5: 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.
Function
(pin closed)
Setting
Pin 1-2
Short/Closed
Pin 2-3
Short/Closed
Setting
Pin 1-2
Short/Closed
Pin 2-3
Short/Closed
COM2
RS-232
JP3:
3-5 & 4-6
Jumper
Setting JP4:
3-5 & 4-6
JP5:
1-2
MB500 User's Manual
INSTALLATIONS
Function
5V
3.3V
Function
Normal
Clear CMOS
RS-422 RS-485
JP3:
1-3 & 2-4 1-3 & 2-4
JP4:
1-3 & 2-4 1-3 & 2-4
JP5:
3-4
JP3:
JP4:
JP5:
5-6
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