INSTALLATIONS
16
MB870 User’s Manual
J2: ATX Power Supply Connector
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
+5V 19
9 5VSB
+5V 20
10 +12V
11 1
20 10
J3: PS/2 Keyboard and PS/2 Mouse Connectors
PS/2 Mouse
PS/2 Keyboard
Signal Name
Keyboard
Mouse Signal Name
Keyboard data
1
1
Mouse data
N.C. 2
2
N.C.
GND 3
3
GND
5V 4
4
5V
Keyboard clock
5
5
Mouse clock
N.C. 6
6
N.C.
J4: CPU Fan Power Connector
J4 is a 3-pin header for the CPU fan. The fan must be a 12V fan.
Pin #
Signal Name
1 Ground
2 +12V
3 Rotation
detection
Summary of Contents for MB870
Page 1: ...MB870 Socket 478 Pentium 4 ATI RS300M Mini ITX USER S MANUAL Version 1 0...
Page 4: ...iv MB870 User s Manual This page is intentionally left blank...
Page 8: ...INTRODUCTION 4 MB870 User s Manual Board Dimensions...
Page 34: ...INSTALLATIONS 30 MB870 User s Manual This page is intentionally left blank...