1.12 Real-time Clock, CMOS RAM and Battery
The integrated real-time clock (RTC) provides a time of day clock, and
an 85-year calendar with alarm features. P6F94 also has 242 bytes
battery backed CMOS RAM which stores the system setup information
and password. The RTC and CMOS RAM can be set via the BIOS
SETUP program. The contents of the CMOS RAM can be cleared by
placing a shunt to short pin2 and pin3 of JP9 for 5 seconds when the
system power is off. A coin-cell style Lithium CR2032 battery is used to
provide power to the RTC and CMOS memory. The battery has a three
year life if the system is not powered up. When the system powers up,
the power for the RTC and CMOS RAM is supplied from the 5 V power
supply to extend the life of the battery.
1.13 IrDA Infrared Support
A 5-pin header connector is used to connect a Hewlett Packard HSDSL-
1000 compatible IrDA or Sharp ASKIR Infrared module. Once the
module is installed, the user can use application software such as
Microsoft Infrared (MSIR) to transfer files between the computer system
and portable devices such as laptops and printers.
1.14 Power Management
The integrated DPMA (Dynamic Power Management Architecture)
features in the Intel 82440LX/EX AGPset go far beyond the original
vision of the “Green PC” to create exciting new application models for
the “OnNow” PC platform. The “OnNow” PC is a PC which is always
on and ready for use but appears to be off when not in use. The P6F94
not only complies with EPA, APM1.2 and ACPI (Advanced
Configuration and Power Interface), but also provides the following
power management features.
- Power-on by an external modem ring in or a watchdog timer (Alarm)
System could be powered on by phone ring, or by software that has
requested the PC to wake up at a preset time.(required ATX power
supply)
- Suspend mode indicator
The power LED becomes dim when system is in suspend mode.
P6F94 User’s Manual 15
Chapter 1: Introduction
