Technical Description

The OMG-COMM8-PCIutilizes the 16C554 UART. This chip features programmable baud rate, data format, interrupt control and a 16-byte input and output FIFO, and is functionally 4 16C550 UARTs. A full array of advanced UARTS is also available for this card. Contact Omega Engineering for more information.

Connector Pin Assignments
DB-25 (RS-232 DTE)			(DB25 MALE)

	Signal	Name		Pin #	Mode
	GND	Ground		7
	TD	Transmit Data		2	Output
	RTS	Request To Send		4	Output
	DTR	Data Terminal Ready		20	Output
	RD	Receive Data		3	Input
	CTS	Clear To Send		5	Input
	DSR	Data Set Ready		6	Input
	DCD	Data Carrier Detect		8	Input
	RI	Ring Indicator		22	Input
DB-9 (EIA-574 DTE) (DB9 MALE)

	Signal	Name		Pin #	Mode
	GND	Ground		5
	TD	Transmit Data		3	Output
	RTS	Request To Send		7	Output
	DTR	Data Terminal Ready		4	Output
	RD	Receive Data		2	Input
	CTS	Clear To Send		8	Input
	DSR	Data Set Ready		6	Input
	DCD	Data Carrier Detect		1	Input
	RI	Ring Indicator		9	Input

Technical Note: Please terminate any control signals that are not going to be used. The most common way to do this is connect RTS to CTS and RI. Also, connect DCD to DTR and DSR. Terminating these pins, if not used, will help

insure you get the best performance from your adapter.

OMG-COMM8-PCI

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Connector Pin Assignments

DB-25 (RS-232 DTE)

(DB25 MALE)

DB-9 (EIA-574 DTE) (DB9 MALE)