ADS Technologies manual Serial PortsCOM1~4, COM2 RS-232 Serial port Pin Header, AR-B185114

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AR-B1851 User’s Guide

3.2 Serial Ports(COM1~4)

The AR-B1851 offers two high speeds NS16C550 compatible UARTs with Read/Receive 16 byte FIFO serial ports.

• COM2 : RS-232 Serial port (Pin Header)

PIN	DESCRIPTION	PIN	DESCRIPTION
1	-DCD	2	-DSR
3	RXD	4	-RTS
5	TXD	6	-CTS
7	-DTR	8	-RI
9	GND	10	NC

• COM1 : RS-232 with RS-422/485 Serial port(Pin Header)

PIN	DESCRIPTION	PIN	DESCRIPTION
1	-DCD	2	-DSR
3	RXD	4	-RTS
5	TXD	6	-CTS
7	-DTR	8	-RI
9	GND	10	GND
11	TX+	12	TX-
13	RX+	14	RX-

AR-B185114

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Contents AR-B1851 @Copyright AR-B18512Contents Award Bios Setup AR-B18514Specifications AR-B18515AR-B18516 What You Have AR-B18517Top Placement AR-B18518 AR-B1851’s LayoutBottom Placement AR-B18519 Power Button Setting Cmos Reset Jumper descriptionJP6 Select LCD Voltage JP4 Select COM4 is RS232 or RS422/485Description AR-B185112AR-B1851 Ultra ATA33/66/100 IDE Disk Drive ConnectorIDE1IDE 1 Secondary IDE Connector 44 Pins COM1 RS-232 with RS-422/485 Serial portPin Header Serial PortsCOM1~4COM2 RS-232 Serial port Pin Header AR-B185114Keyboard / Mouse ConnectorMSKB1 USB Port ConnectorUSB1~4FAN1 Fan Connector for CPU Fan Connector FAN1LAN RJ45 Connector LAN1/2 LAN1/2 LAN RJ45 ConnectorAR-B185117 Compact Flash Storage Card SocketCF1CF1 Compact Flash Storage Card Socket pin assignment VGA1 15-pin D-Sub Connector VGA ConnectorVGA1Audio ConnectorAUDIO1 AUDIO1 Audio Pin HeaderDDR Sodimm Socket J1 11 8-BIT Gpio ConnectorGPIO1Speak ConnectorSPK1 LVDS1 Lvds Interface Connector Lvds ConnectorLVDS1PRN1 Parallel Port Connector Parallel portPRN1Press DEL to enter Setup Starting SetupUsing Setup IntroductionAR-B185122 Main Menu Options DescriptionIDE Adapters AR-B185124Cylinder0 Head0 Precomp0 Landing Zone0 Sector0 Quick Power On Self Test Advanced Bios FeaturesApic Mode Full Screen Logo ShowPwron After Power-Fail Boot DisplayPower Supply Type PS/2 Mouse FunctionIRQ Resources PnP/PCI Configuration SetupResource controlled by IRQ3/4/5/7/9/10/11/12/14/15 assigned toOnboard Serial Port 1/Port Uart Mode SelectPeripheral Onboard Serial Port 3/PortUSB 2.0 Controller Onboard Parallel PortUSB Controller AR-B185130AR-B185131 Shutdown TemperaturePC Health AR-B185132 BootFirst/Second/Third/Other Boot Device Exit Selecting Save & Exit SetupLoad Optimized Defaults AR-B185133 Save to Cmos and Exit Y/N? YQuit without saving Y/N? Y Load Fail-Safe DefaultsExit Without Saving AR-B185134Appendix A. Watchdog Timer Appendix B Digital I/O AR-B185136AR-B185137 Appendix C I/O Address Map COM3 1DFF0000-1DFFFFFF AR-B185140IRQ Mapping Chart AR-B185141