Fdd1: Floppy Drive Connector; Cn1: Atx 12V/+12V Power Connector; Cn2, Cn3: Usb Connectors - Intel IB840 User Manual

FDD1: Floppy Drive Connector

FDD1 is a 34-pin header and will support up to 2.88MB floppy drives.
FDD1

CN1: ATX 12V/+12V Power Connector

CN2, CN3: USB Connectors

The following table shows the pin outs of the USB pin headers
connectors. Overall, the two pin headers support four USB ports.
CN2
Signal Name Pin #
Ground
Ground
Ground
Ground
Ground
Ground
Ground
Ground
Ground
Ground
Ground
Ground
Ground
Ground
Ground
Ground
Ground
Pin #
1
2
3
4
Signal Name
Vcc
USB0-
USB0+
Ground
IB840 User' s Manual
INSTALLATIONS
Pin #
1 2
3 4
5 6
7 8
9 10
11 12
13 14
15 16
17 18
19 20
21 22
23 24
25 26
27 28
29 30
31 32
33 34
Signal Name
Ground
Ground
+12V
+12V
Pin Pin Signal Name
1 5
2 6
3 7
4 8
Signal Name
RM/LC
No connect
No connect
Index
Motor enable 0
Drive select 1
Drive select 0
Motor enable 1
Direction
Step
Write data
Write gate
Track 00
Write protect
Read data
Side 1 select
Diskette change
Ground
USB1+
USB1-
Vcc
21