IEI Integration NOVA-HM551 v1.10 - Manual (Page 52)

NOVA-HM551 5.25" SBC
Page 38
Figure 3-20: Serial Port Connector Location
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 GND 10 GND
11 TXD485+ 12 TXD485#
13 RXD485+ 14 RXD485#
Table 3-21: Serial Port Connector Pinouts
3.2.20 SMBus Connector
CN Label: SMB1
CN Type: 4-pin wafer
CN Location: See Figure 3-21
CN Pinouts: See Table 3-22
The SMBus (System Management Bus) connector provides low-speed system
management communications.