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3.6
External Switches and Indicators
There are several external switches and indicators for
monitoring and controlling your CPU board. All the functions are
in the CN12 connector.
CN12 : External Switches and Indicators
PIN DESCRIPTION PIN DESCRIPTION
1
+5V
Power
3
N/C
LED
5
GND
7
N/C
9
GND
11
GND
13
IDE LED+
• CN3 : 2-pin Header ATX BUTTON Connector
PIN NO.
DESCRIPTION
1
ATX BUTTON
2
GND
• CN13 : Backplane to Mainboard Connector
PIN NO.
DESCRIPTION
1
5VSB
2
ATX-ON
3
GND
Power source from Backplane with ATX Connector
(Through Power Button & +5VSB)
3.7
USB Port Connector
The ROCKY- 772EV provide 4 built-in USB ports for the future
new I/O bus expansion.
CN9 / CN10
2
Speaker
4
N/C
Speaker
6
N/C
8
+5V
10
Reset Switch
Reset
12
GND
button
14
IDE LED-
19
PIN NO. DESCRIPTION PIN NO. DESCRIPTION
1
VCC
3
DATA-
5
DATA+
7
GROUND
3.8
IrDA Infrared Interface Port
The ROCKY-772EV has a built-in IrDA port which supports
Serial Infrared (SIR) or Amplitude Shift Keyed IR (ASKIR)
interface. If you want to use the IrDA port, you have to configure
SIR or ASKIR model in the BIOS under Peripheral Setup COM2.
Then the normal RS-232 COM 2 will be disabled.
• CN2: IrDA connector
PIN NO.
DESCRIPTION
1
VCC
2
NC
3
IR-RX
4
Ground
5
IR-TX
3.9
CPU & SYSTEM Fan Connectors (FAN1,FAN2)
The ROCKY-772EV provides two CPU cooling fan connectors,
FAN2 as well as a SYSTEM Fan connector, These connectors
can supply 12V/500mA to the cooling fan. All connectors have
the same pin assignments and provide a "rotation" pin to get
rotation signals from fans and notice the system. So the system
BIOS can recognize the fan speed. Please note that only
specified fan can issue the rotation signals.
• FAN1/FAN2 : Fan Connector
PIN NO.
DESCRIPTION
1
Rotation Signal
2
12V
3
Ground
3.10 LAN RJ45 & State LED Connectors
The ROCKY-772EV is equipped with two built-in 10/100Mbps
Ethernet controllers. You can connect it to your LAN through
2
GROUND
4
DATA+
6
DATA-
8
VCC
20
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