Vig550B Motherboard Manual – Ver 1.0
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estimated life of three years. When the computer is plugged in, the 3.3-V standby
current from the power supply extends the life of the battery. The clock is accurate
to
±
13 minutes/year at 25 ºC with 3.3 V applied.
I/O Interface Controller
The motherboard uses the SMC FDC37C777 I/O controller which features:
•
Serial ports:
o
Internal send/receive 16-byte FIFO buffer.
o
Four internal 8-bit DMA options for the UART with SIR support (USI).
•
Multimode bidirectional parallel port:
o
Standard mode, IBM and Centronics compatible.
o
Enhanced parallel port (EPP) mode with BIOS and driver support.
o
High-speed extended capabilities port (ECP) mode.
•
Floppy disk controller:
o
N82077
compatible.
o
Single diskette drive interface.
o
16-byte
FIFO.
o
High-performance digital data separator (DDS).
o
PC-AT and PS/2 drive-mode support.
•
Keyboard and mouse controller:
o
Industry standard 8042A compatible.
o
General-purpose
microcontroller.
o
8-bit internal data bus.
•
ISA Plug-and-Play compatible register set.
•
PCI PME interface.
•
Intelligent auto power management:
o
Shadowed write-only registers for ACPI compliance.
o
Programmable wake up event interface.
By default, the I/O controller interfaces are automatically configured during boot up.
The I/O controller can also be manually configured in the Setup program
.
Serial Ports
One 9-pin D-Sub serial port connector is located on the back panel and is compatible
with NS16C550 UARTs.
NOTE:
If a dual serial port card is installed in a PCI slot, wake on LAN needs to be
disabled, otherwise the system will not shutdown and stay off.