User`s manual

PICO822 Intel
®
Atom
TM
E620T/E680T All-In-One Pico-ITX Board
Board and Pin Assignments 15
2.5.3 USB and Front Panel Connector (CN4)
The CN4 is for USB and front panel signal connector.
USB:
Pin 1 to pin 20 are for Universal Serial Bus (USB) signal, including four USB 2.0 and one
client USB 2.0.
Note: When Windows
®
XP is installed, please attach keyboard and mouse on USB
port 0 and port 2.
Front Panel:
Power LED
Pin 23(-) and 24(+) connect the case-mounted system power LED indicator switch. The
power LED lights up when the system is powered on.
Power On/Off Button
Pin 25 and 26 connect the power button on front panel to the CPU board, which allows
users to turn on or off power supply.
System Reset Switch
Pin 27 and 28 connect the case-mounted reset switch that reboots your computer
without turning off the power switch. It is a better way to reboot your system for a longer
life of system power supply.
HDD Activity LED
This connection is linked to hard drive activity LED on the control panel. LED flashes
when HDD is being accessed. Pin 29(-) and 30(+) connect the hard disk drive to the
front panel HDD LED.
Pin
Signal
Pin
Signal
1
USB_PWR
2
USB_PWR
3
USB_0#
4
USB_1#
5
USB_0
6
USB_1
7
USB_GND
8
USB_GND
9
USB_GND
10
USB_GND
11
USB_2
12
USB_3
13
USB_2#
14
USB_3#
15
USB_PWR
16
USB_PWR
17
USB_Client_DT
18
USB_Client#
19
+5VS / N.C
20
USB_Client
21
N.C
22
GND
23
GND
24
+5VS
25
GND
26
PWR_BUTTON
27
GND
28
Reset
29
HDD LED DT
30
+3.3VS