2System Board - (SiS Chipset) (Part Number: D4051-63001) Devices on the ISA Bus

Feature Summary

Function

Features

 

 

Floppy disk controller

❒ Software compatible with the DP8473, the 765A, and the

 

N82077

 

❒ 16-byte FIFO (default disabled)

 

❒ Burst and non-burst modes

 

❒ Perpendicular recording drive support

 

❒ New high-performance internal digital data separator (no

 

external filter components required)

 

❒ Low-power CMOS with enhanced power-down mode

 

❒ Automatic media-sense support

 

 

UARTs

❒ Software compatible with the PC16550A and PC16450

 

❒ A modifiable address that is referenced by a 16-bit programma-

 

ble register.

 

❒ 13 IRQ channel options.

 

❒ Shadow register support for write-only bits.

 

❒ Four 8-bit DMA options for UART2.

 

 

Bidirectional parallel port

❒ Enhanced Parallel Port (EPP) compatible

 

❒ Extended Capabilities Port (ECP) compatible

 

❒ Bidirectional under either software or hardware control

 

❒ Demand mode DMA support.

 

❒ Selection of internal pull-up or pull-down resistor for Paper End

 

(PE) pin.

 

❒ Reduction of PCI bus utilization by supporting a demand DMA

 

mode mechanism and a DMA fairness mechanism.

 

❒ Includes protection circuit against damage caused when printer

 

is switched on, or operated at higher voltages.

 

❒ Output buffers that can sink and source 14 mA.

 

 

Three general purpose pins for three

❒ Programmed for game port control.

separate chip select signals

❒ Chip Select 0 (CS0) signal produces open drain and is powered

 

by the VCCH.

 

❒ Chip Select 1 (CS1) and 2 (CS2) signals have push-pull buffers

 

and are powered by the main VDD.

 

❒ Decoding of chip select signals depends on the address and the

 

Address Enable (AEN) signal, and can be qualified using the

 

Read (RD) and Write (WR) signals.

 

 

Enhanced power management

❒ Special configuration registers for power down

 

❒ Reduced current leakage from pins.

 

❒ Low-power CMOS technology.

 

❒ Ability to shut off clocks to all modules.

 

 

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