Real-Time Clock Subsystem; Audio Subsystem; Audio Jack Support - Intel DP55WB - Media Series P55 micro-ATX Core i7 i5 LGA1156 Desktop Motherboard Specification

Intel Desktop Board DP55WB Technical Product Specification
1.7

Real-Time Clock Subsystem

A coin-cell battery (CR2032) powers the real-time clock and CMOS memory. When
the computer is not plugged into a wall socket, the battery has an estimated life of
three years. When the computer is plugged in, the standby current from the power
supply extends the life of the battery. The clock is accurate to ± 13 minutes/year at
25 ºC with 3.3 VSB applied via the power supply 5V STBY rail.
NOTE
If the battery and AC power fail date and time values will be reset and the user will be
notified during POST.
When the voltage drops below a certain level, the BIOS Setup program settings stored
in CMOS RAM (for example, the date and time) might not be accurate. Replace the
battery with an equivalent one. Figure 1 on page 11 shows the location of the battery.
1.8

Audio Subsystem

The board supports the Intel High Definition Audio subsystem based on the Realtek
ALC888-VC2-GR audio codec. The audio subsystem supports the following features:
• Advanced jack sense for the back panel audio jacks that enables the audio codec to
recognize the device that is connected to an audio port. The back panel audio
jacks are capable of retasking according to the user's definition, or can be
automatically switched depending on the recognized device type.
• 3-port analog audio out stack
• Internal S/PDIF out
• Windows Vista Premium and Windows 7 certification
Table 4 lists the supported functions of the front panel and back panel audio jacks.
Table 4. Audio Jack Support
Audio Jack
Front panel – Green
Front panel – Pink
Back panel – Blue
Back panel – Green
Back panel – Pink
20
Speaker
Micro- Head-
phone phones Stereo)
Default Ctrl panel
Default
Ctrl panel
Default
Front
(Main
Line In (Stereo 2)
Default
Default
Rear
Surround Center/Sub
(Stereo 3)
Ctrl panel
Ctrl panel