Intel WX58BP Manual Do Utilizador
Technical Reference
19
1.7
Real-Time Clock (RTC) Subsystem
A coin-cell battery (CR2032) powers the real-time clock (RTC) and CMOS memory.
When the computer is not plugged into a wall socket, the battery’s estimated life is
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
25º C with 3.3 VSB applied.
When the computer is not plugged into a wall socket, the battery’s estimated life is
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
25º C with 3.3 VSB applied.
NOTE
If the battery and AC power fail, the Date and Time values will reset and the user is
notified during POST.
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 shows the location of the battery.
in CMOS RAM (for example, the date and time) might not be accurate. Replace the
battery with an equivalent one. Figure 1 shows the location of the battery.
1.8
Legacy I/O Controller
The I/O controller provides the following features:
Serial IRQ interface compatible with serialized IRQ support for PCI systems
Intelligent power management, including a programmable wake-up event interface
PCI power management support
The BIOS Setup program provides configuration options for the I/O controller.
Serial IRQ interface compatible with serialized IRQ support for PCI systems
Intelligent power management, including a programmable wake-up event interface
PCI power management support
The BIOS Setup program provides configuration options for the I/O controller.