HP b1000 manual RS-232C Serial Input/Output Connector, Serial I/O Pins Pin No Signal Description

System Overview

System Unit Rear Panel Connectors

RS-232C Serial Input/Output Connector

You can attach a variety of pointing devices (such as a mouse or trackball), or peripheral devices (such as printers, plotters, modems, and scanners) to the RS-232C Serial Input/Output (SIO) ports on this computer. Consult the documentation that accompanies each pointing or peripheral device for specific information concerning its use.

The SIO ports are programmable. This means that you can set functions such as bit rate, character length, parity and stop bits using the System Administration Manager (SAM) or by selecting a system special device file with the functions already programmed. The SIO ports are used as an interface for serial asynchronous devices to the CPU.

Table 1-3 shows the SIO connector pin listings. The serial connectors are 9-pin D-sub connectors. Signal names are those specified in the EIA RS-232 standard.

Table 1-3	Serial I/O Pins
	Pin No.	Signal	Description
	1	DCD	Data Carrier Detect
	2	RXD	Receive Data
	3	TXD	Transmit Data
	4	DTR	Data Terminal Ready
	5	GND	Ground
	6	DSR	Data Set Ready
	7	RTS	Request To Send
	8	CTS	Clear To Send
	9	RI	Ring Indicator

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