SBC86840 Series All-In-One Mini ITX Board User’s Manual
Jumpers and Connectors
32
2.4.16 Audio CD-In Connector: CN20
This connector is provided for external audio input.
Pin
Description
1 CD
IN_L
2 GND
3 GND
4 CD
IN_R
CN20
2.4.17 SMBUS Connector: CN21
This connector CN21 is for SMBUS interface support.
Pin
Description
1 SMB_CLOCK
2 SMB_DATA
3 GND
CN21
2.4.18 Flat Panel Bezel Connector: CN23
Power LED
This 3-pin connector named as Pin 1, 3 and Pin 5 connect the
system power LED indicator to such a switch on the case. Pin 1 is
assigned as +, and Pin 5 as -. The Power LED lights up when the
system is powered ON.
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