Intel DP55WB Product Specification - Page 20

Real-Time Clock Subsystem, Audio Subsystem - bios reset

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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 Microphone Default Headphones Default Default Ctrl panel Front Speaker (Main Stereo) Ctrl panel Default Line In Rear Surround (Stereo 2) Center/Sub (Stereo 3) Default Ctrl panel Ctrl panel 20

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Intel Desktop Board DP55WB Technical Product Specification
20
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
Micro-
phone
Head-
phones
Front
Speaker
(Main
Stereo)
Line In
Rear
Surround
(Stereo 2)
Center/Sub
(Stereo 3)
Front panel – Green
Default
Ctrl panel
Front panel – Pink
Default
Back panel – Blue
Default
Ctrl panel
Back panel – Green
Ctrl panel
Default
Back panel – Pink
Default
Ctrl panel