Asus Crosshair II Formula - Manual (Page 60)

2-34 Chapter 2: Hardware information
8. Chassis intrusion connector (4-1 pin CHASSIS)
This connector is for a chassis-mounted intrusion detection sensor or switch.
Connect one end of the chassis intrusion sensor or switch cable to this
connector. The chassis intrusion sensor or switch sends a high-level signal to
this connector when a chassis component is removed or replaced. The signal
is then generated as a chassis intrusion event.
By default, the pin labeled “Chassis Signal” and “Ground” are shorted with
a jumper cap. Remove the jumper caps only when you intend to use the
chassis intrusion detection feature.
9. Digital audio connector (4-1 pin SPDIF_OUT for ASUS HDMI VGA card)
This connector is for an additional Sony/Philips Digital Interface (S/PDIF)
port(s). If you are using an ASUS HDMI-equipped graphics card, connect the
HDMI card to this connector with a S/PDIF Out cable.
The ASUS HDMI-equipped graphics card and the S/PDIF Out cable are
purchased separately.
CROSSHAIR II FORMULA
®
RESET
CROSSHAIR II FORMULA Chassis intrusion connector
+5VSB_MB Chassis Signal GN
D
CHASSIS
CROSSHAIR II FORMULA
®
RESET
GND
SPDIFOUT
+5V
SPDIF_OUT
CROSSHAIR II FORMULA Digital audio connector