A. Specifications
J5 (Rear-Panel User I/O Connector) J5 is a 110-pin, 2mm x 2mm, right angle, female connector (AMP 646489-1) capable of
transitioning the following signals for rear-panel I/O:
• Keyboard/Mouse • COM1 • VGA • Reset • Floppy • USB0, USB1
• Compact Flash • COM2 • NMI • IDE • Floppy Power • Speaker
See the “J5 Rear-Panel User I/O Connector Pinout” table for pin definitions and the
“Backplane Connectors—Pin Locations” figure showing pin placement.
J5 Rear-Panel User I/O Connector Pinout
Pin A B C D E F
22 USB0+ USB0- SW-5V USB1+ USB1-
21 SW-3.3V GND GND GND GND
20 RED GND H-SYNC GND SMBD
19 GND SW-5V GND SW-5V SMBC
18 GREEN GND V-SYNC GND SMBA-
17 GND RESV RP_PRES- RESV IPMB PWR
16 BLUE GND DDCCLK KBDAT KBCLK
15 GND SW-5V DDCDAT MSDAT MSCLK
14 S1RTS S1CTS S1RIN S1DTR ENETA-LINK
13 S1DCD S1TXD S1RXD S1DSR ENETA-ACT
12 S2RTS S2CTS S2RIN S2DTR ENETB-LINK
11 S2DCD S2TXD S2RXD S2DSR ENETB-ACT
10 TRK0- WP- RDATA- HDSEL- DSKCHG-
9 MTR1- DIR- STEP- WDATA- WGATE-
8 DENSL INDEX- MTR0- DR1- DR0-
7 CS1S- CS3S- DA1 RPELED RPEJECT-
6 PWRGD SPKR NMI- DA0 DA2
5 DDRQ IORDY DI0W- DDACK DIOR-
4 DD14 DD0 IDE_ACT DD15 DRV_IRQ
3 DD3 DD12 DD2 DD13 DD1
2 DD9 DD5 DD10 DD4 DD11
1 PBRST- DRST- DD7 DD8 DD6
Ground Shield
Pin A B C D E F
24