S82078中文資料英特爾數(shù)據(jù)手冊(cè)PDF規(guī)格書(shū)

The 82078 Product Family brings a set of enhanced floppy disk controllers. These include several features that allow for easy implementation in both the portable and desktop market. The current family includes a 64 pin and a 44 pin part in the smaller form factor QFP package. The 3.3V version of the 64 pin part provides an ideal solution for the rapidly emerging 3.3V platforms. It also allows for a 5.0V tolerant floppy drive interface that lets the users retain their normal 5.0V drives. Another version of the 64 pin part provides support for 2 Mbps data rate tape drives.

Small Footprint and Low Height Packages

Supports Standard 5.0V as Well as Low Voltage 3.3V Platforms

- Selectable 3.3V and 5.0V Configuration

- 5.0V Tolerant Drive Interface

Enhanced Power Management

- Application Software Transparency

- Programmable Powerdown Command

- Save and Restore Commands for 0V Powerdown

- Auto Powerdown and Wakeup Modes

- Two External Power Management Pins

- Consumes No Power While in Powerdown

Programmable Internal Oscillator

Floppy Drive Support Features

- Drive Specification Command

- Media ID Capability Provides Media Recognition

- Drive ID Capability Allows the User to Recognize the Type of Drive

- Selectable Boot Drive

- Standard IBM and ISO Format Features

- Format with Write Command for High Performance in Mass Floppy Duplication

Integrated Host/Disk Interface Drivers

Integrated Analog Data Separator

- 250 Kbits/sec

- 300 Kbits/ sec

- 500 Kbits/ sec

- 1 Mbits/sec

- 2 Mbits/sec

Integrated Tape Drive Support

- Standard 1 Mbps/500 Kbps/250 Kbps Tape Drives

- New 2 Mbps Tape Drive Mode

Perpendicular Recording Support for 4 MB Drives

Fully Decoded Drive Select and Motor Signals

Programmable Write Precompensation Delays

Addresses 256 Tracks Directly, Supports Unlimited Tracks

16 Byte FIFO

Single-Chip Floppy Disk Controller Solution for Portables and Desktops

- 100 PC-AT* Compatible

- 100 PS/2* Compatible

- 100 PS/2 Model 30 Compatible

- Fully Compatible with Intel’s 386SL Microprocessor SuperSet

- Integrated Drive and Data Bus Buffers

Available in 64 Pin QFP and 44 Pin QFP Package