SBC86840 Series All-In-One Mini ITX Board User’s Manual
Jumpers and Connectors
11
2.3.2
COM1~COM4 Mode Select for Type Jumpers:
JP1, JP2, JP3, JP7
These jumpers select the COM1~COM4 ports’ pin-1 to operate DCD
with +5V and +12V power, and pin-8 or pin-9 to operate RI with +5V
and +12V.
Description
Function
Jumper Setting
Pin 1=12V
JP7
Pin 1=5V
JP7
JP7
*Pin 1=DCD
(Default)
JP7
Pin 9=12V
JP7
Pin 9=5V
JP7
JP7
COM1 (CN7)
*Pin 9=RI
(Default)
JP7
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