Intel MB890 J21 External Audio Connector, J22 System Function Connector, J24 Compact Flash Socket

INSTALLATIONS

J21: External Audio Connector

J21 is a 12-pin header that is used to connect to the optional audio cable card that integrates jacks for Line In, Line Out and Mic.

Signal Name	Pin #	Pin #	Signal Name
LINEOUT R	1	2	LINEOUT L
Ground	3	4	Ground
LINEIN R	5	6	LINEIN L
Ground	7	8	Ground
Mic-In	9	10	VREFOUT
Ground	11	12	Protect pin

J22: System Function Connector

J22 provides connectors for system indicators that provide light indication of the computer activities and switches to change the computer status. J22 is a 10-pin header that provides interfaces for speaker, SMI, power button, reset switch and HDD LED.

Signal Name		Pin	Pin
SP+	1		2
Ground	3		4
Ground	5		6
Ground	7		8
HDD LED+		9	10

Signal Name

SP-

EXT_SMI_SW

PWR_BTN

Reset

HDD LED-

J23: Wake On LAN Connector

J23 is a 3-pin header for the Wake On LAN function. Wake On LAN will function properly only with an ATX power supply with 5VSB that has 200mA.

Pin #	Signal Name
1	+5VSB

2Ground

3-PME

J24: Compact Flash Socket

MB890 User’s Manual 21