Intel MAT-880 user manual R2-422, J20 IrDA Connector, J21 ATX Power Supply Connector

INSTALLATIONS

COM2 is jumper selectable for RS-232, RS-422 and RS-485.

Pin #		Signal Name
	RS-232	R2-422	RS-485
1	DCD	TX-	DATA-
2	RX	TX+	DATA+
3	TX	RX+	NC
4	DTR	RX-	NC
5	Ground	Ground	Ground
6	DSR	RTS-	NC
7	RTS	RTS+	NC
8	CTS	CTS+	NC
9	RI	CTS-	NC
10	NC	NC	NC

J20: IrDA Connector

J20 is used for an optional IrDA connector for wireless communication.

				Pin #			Signal Name
				1					+5V
				2				No connect
				3					Ir RX
				4					Ground
				5					Ir TX
J21: ATX Power Supply Connector
11	1
		Signal Name			Pin #				Pin #	Signal Name
			3.3V			11			1			3.3V
			-12V			12			2			3.3V
			Ground			13			3		Ground
			PS-ON			14			4			+5V
			Ground			15			5		Ground
			Ground			16			6			+5V
			Ground			17			7		Ground
			-5V			18			8	Power good
20	10		+5V			19			9			5VSB
			+5V			20			10			+12V

24 MAT-880 User’s Manual