User`s manual

SBC86831 Series All-In-One Mini ITX Board User’s Manual
Jumpers and Connectors
11
COM1 (CN7) JP7 COM2 (CN2) JP4
Pin 1=12V Short 1-3 Pin 1=12V Short 1-3
Pin 1=5V Short 3-5 or 5-7 Pin 1=5V Short 3-5 or 5-7
*Pin 1=DCD Short 7-9 (Default) *Pin 1=DCD Short 7-9 (Default)
Pin 9=12V Short 2-4 Pin 8=12V Short 2-4
Pin 9=5V Short 4-6 or 6-8 Pin 8=5V Short 4-6 or 6-8
*Pin 9=RI Short 8-10
(Default)
*Pin 8=RI Short 8-10
(Default)
COM3 (CN3) JP5 COM4 (CN4) JP6
Pin 1=12V Short 1-3 Pin 1=12V Short 1-3
Pin 1=5V Short 3-5 or 5-7 Pin 1=5V Short 3-5 or 5-7
*Pin 1=DCD Short 7-9 (Default) *Pin 1=DCD Short 7-9 (Default)
Pin 8=12V Short 2-4 Pin 8=12V Short 2-4
Pin 8=5V Short 4-6 or 6-8 Pin 8=5V Short 4-6 or 6-8
*Pin 8=RI Short 8-10
(Default)
*Pin 8=RI Short 8-10
(Default)
2.3.5 CPU Frequency Selec Jumpers: JP8, JP9, JP10
These jumpers help you set the CPU frequency.
123
JP8, JP9, JP10
CPU Frequency JP8 JP9 JP10
Auto Select
(Default)
Short 1-2
(Default)
Short 1-2
(Default)
Short 1-2
(Default)
533MHz Short 2-3 Short 2-3 Short 2-3
667MHz Short 2-3 OPEN Short 2-3