User's Manual

Product Description

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NOTE

The recommended method of accessing the date in systems with Intel desktop boards is indirectly

from the Real-Time Clock (RTC) via the BIOS. The BIOS on Intel desktop boards contains a

century checking and maintenance feature. This feature checks the two least significant digits of

the year stored in the RTC during each BIOS request (INT 1Ah) to read the date and, if less than

80 (i.e., 1980 is the first year supported by the PC), updates the century byte to 20. This feature

enables operating systems and applications using the BIOS date/time services to reliably

manipulate the year as a four-digit value.

For information about Refer to

Proper date access in systems with Intel desktop boards http://support.intel.com/support/year2000/

1.7 I/O Controller

The SMSC LPC47M102 I/O controller provides the following features:

• Low pin count (LPC) interface

• One serial port

• Infrared (IrDA) interface

• Intelligent power management, including a programmable wake up event interface

• Fan control:

 One pulse width modulation (PWM) fan speed control output

 One fan tachometer input

The BIOS Setup program provides configuration options for the I/O controller.

For information about Refer to

SMSC LPC47M102 I/O controller http://www.smsc.com

The IrDA interface Section 2.8.3, page 46

1.8 Serial Debug Port

The board has one 9-pin serial debug port connector. The serial debug port’s

NS16C550-compatible UART supports data transfers at rates of up to 115.2 kbits/sec with BIOS

support. The serial debug port can be assigned as COM1 (3F8h), COM2 (2F8h), COM3 (3E8h), or

COM4 (2E8h).

For information about Refer to

The location of the serial debug port connector Figure 5, page 41

The signal names of the serial debug port connector Table 26, page 43