I/O Interface Controller - SOYO SY-K7AIA User Manual

Motherboard Description
1-9.5 Power management
The power management features include the following:
l
Full-compliance support for both ACPI and Microsoft ® PC 98 power
management
l
AMD-751 system controller supports the following three power
states:
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Full-on – Fully operational

Halt/Stop Grant – The AMD-7851 disconnects the processor
and, in the Stop Grant state, the SDRAMs are put into self-
refresh.

1-10 I/O INTERFACE CONTROLLER

The motherboard uses the Winbond W83977ATF I/O controller which
features:
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Single diskette drive interface
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Two serial ports
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FIFO supports on both serial and diskette interfaces
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One parallel port with Extended Capabilities Port (ECP) and
Enhanced Parallel Port (EPP) support
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PS/2 style mouse and keyboard interfaces
l
PCI PME interface
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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.
1-10.1 Serial Ports
The NS16C5450-compatible UARTs support data transfers at speeds up to
115.2 Kbits/sec with BIOS support.
1-10.2 Parallel Port
In the Setup program, there are four options for parallel port operation:
l
Compatible (standard mode)
l
Bi-directional (PS/2 compatible)
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SY-K7AIA