Intel MB890 J2 HDD Power Connector, J3 Internal DC-InPower Connector, J5 LCD Backlight Setting

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

J2: HDD Power Connector

Pin #	Signal Name
1	+12V
2	Ground
3	Ground
4	5V

J3: Internal DC-In Power Connector

Pin #	Signal Name
1	Ground
2	Ground
3	+12V or 19V
4	+12V or 19V

J5: LCD Backlight Setting

Pin #	Signal Name
1	+12V
2	Backlight Enable
3	Ground

MB890 User’s Manual 17