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Motherboard Description SY-6IWM
13
1-7.3 Real-Time Clock, CMOS SRAM, and Battery
The real-time clock is compatible with DS1287 and MC146818 components. The
clock provides a time-of-day clock and a multicentury calendar with alarm features
and century rollover. The real-time clock supports 256 bytes of battery-backed
CMOS SRAM in two banks that are reserved for BIOS use.
The time, date, and CMOS values can be specified in the Setup program. The
CMOS values can be returned to their defaults by using the Setup program.
1-8 I/O INTERFACE CONTROLLER
The motherboard uses the Winbond W83627HF-AW I/O controller which features:
l Single diskette drive interface
l Two serial ports
l FIFO supports on both serial and diskette interfaces
l One parallel port with Extended Capabilities Port (ECP) and Enhanced
Parallel Port (EPP) support
l PS/2 style mouse and keyboard interfaces
l PCI PME interface
l Intelligent auto power management, including:
Ø Shadowed write-only registers for ACPI compliance
Ø Programmable wake-up event interface
The Setup program provides configuration option for the I/O controller.
1-8.1 Serial Ports
The motherboard has one 9-pin D-Sub serial port connector located on the back
panel. The NS16C5450-compatible UARTs support data transfers at speeds up to
115.2 Kbits/sec with BIOS support.
1-8.2 Parallel Port
The connector for the multimode bi-directional parallel port is a 25-pin D-Sub
connector located on the back panel of the motherboard. In the Setup program,
there are four options for parallel port operation:
l Compatible (standard mode)
l Bi-directional (PS/2 compatible)
l Bi-directional EPP. A driver from the peripheral manufacturer is required for