53
2 System 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
separate chip select signals
❒
Programmed for game port control.
❒
Chip Select 0 (CS0) signal produces open drain and is powered
by the V
CCH
.
❒
Chip Select 1 (CS1) and 2 (CS2) signals have push-pull buffers
and are powered by the main V
DD
.
❒
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.
Summary of Contents for 520 5/XX
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Page 146: ...146 Index ...