82078 CHMOS SINGLE-CHIP
FLOPPY DISK CONTROLLER
Y
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
Y
Y
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
(See Package Specification Order Number 240800 Package
Type S)
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
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
Other brands and names are the property of their respective owners
Other brands and names are the property of their respective owners
Information in this document is provided in connection with Intel products Intel assumes no liability whatsoever including infringement of any patent or
copyright for sale and use of Intel products except as provided in Intel’s Terms and Conditions of Sale for such products Intel retains the right to make
changes to these specifications at any time without notice Microcomputer Products may have minor variations to this specification known as errata
COPYRIGHT
INTEL CORPORATION 1996
February 1994
Order Number 290468-003
82078
Table 1-0 64 Pin Part Versions
3 3V
82078SL
82078-1
X
5 0V
X
X
X
2 Mbps Data Rate
The 44 pin is targeted for platforms that are operated at 3 3V or 5 0V and do not require more than two drive
support The 82078-5 is designed for price sensitive 5 0V designs which do not include 4 MB drive support
Table 2-0 44 Pin Part Versions
3 3V
82078
82078-5
82078-3
X
5 0V
X
X
X
1 Mbps Data Rate
X
Both parts can be operated at 1 Mbps 500 Kbps 300 Kbps 250 Kbps Additionally one version of the 64 pin
part provides 2 Mbps data rate operation specific for the new tape drives
The 82078 is fabricated with Intel’s advanced CHMOS III technology
290468 –1
2
Microcontroller MCU
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