SBC86840 Series All-In-One Mini ITX Board User’s Manual
Jumpers and Connectors
22
2.4.2 Serial Port Connectors: CN2, CN3, CN4
Please refer to the RS-232 pin assignment as listed below:
Pin
Description
Pin
Description
1
Data Carrier Detect
(DCD)
2
Data Set Ready
(DSR)
3 Receive Data (RXD)
4
Request to Send
(RTS)
5 Transmit Data (TXD)
6
Clear to Send (CTS)
7
Data Terminal Ready
(DTR)
8
Ring Indicator (RI)
9 Ground
(GND)
10
NC
CN2, CN3, CN4
2.4.3 Digital I/O Port (DIO) Connector: CN5
The board is equipped an 8-channel digital I/O connector
CN5
that
meets requirements for a system customary automation control. The
digital I/O can be configured to control cash drawers, sense warning
signals from an Uninterrupted Power System (UPS), or perform store
security control. The digital I/O is controlled via software programming.
Pin
Description
Pin
Description
1 Digital Input 1
2
Digital Output 1
3 Digital Input 2
4
Digital Output 2
5 Digital Input 3
6
Digital Output 3
7 Ground(GND)
8
Digital Output 4
9 Ground(GND)
10 Digital Output 5
CN5
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