Com1~Com4 Connectors (Cn11~Cn12); Smbus Connector (Cn2001); Sata Connector (Sata1) - AXIOMTEK SBC87842 User Manual

2.4.8

COM1~COM4 Connectors (CN11~CN12)

The board comes with four standard DB-9 connectors on the rear I/O for
RS-232/422/485 interfaces. If you need these COM ports to support RS-422 or RS-485,
please refer to BIOS setting in section 4.4.
Pin RS-232
1 DCD
2 RXD
3 TXD
4 DTR
5 GND
6 DSR
7 RTS
8 CTS
9 RI
2.4.9

SMBus Connector (CN2001)

This is a 4-pin connector for SMBus interface. The SMBus (System Management Bus) is
a simple bus for the purpose of lightweight communication.
Pin Signal
1 +5V
2 Clock
3 Data
4 GND
2.4.10

SATA Connector (SATA1)

This Serial Advanced Technology Attachment (Serial ATA or SATA) connector is for
high-speed SATA interface. It is a computer bus interface for connecting to devices such
as hard disk drive.
Pin Signal
1 GND
2 TXP
3 TXN
4 GND
5 RXN
6 RXP
7 GND
Board and Pin Assignments
RS-422 RS-485
TX- Data-
TX+ Data+
RX+ No use
RX- No use
GND GND
No use No use
No use No use
No use No use
No use No use
SBC87842 Single Board Computer
1
1
7
1
13