GM82C765B - FLOPPY DISK SUBSYSTEM CONTROLLER - Hynix Semiconductor
Features
IBM PC compatible format
(single and double density)
Floppy disk control and
operations on chip
In PC AT mode, provides required
signal qualification DMA channel
BIOS compatible and dual speed
Spindle Drive support
Integrates Formatter/Controller/Data
Separation, Write Precompensation,
Data rate Selection, Clock
Generation, and drive interface
Drivers and Receivers into one chip
Multisector and Multitrack transfer
capability.
Direct Floppy Disk Drive interface
with no buffers needed
48mA sink output drivers
Schmitt trigger Line Receivers
Enhanced Host Interface:
Supports 12MHz, 286 u-processor
Capable of driving 20 LSTTL
Load
Address mark detection circuitary
internal to Floppy Disk Controller
On chip Clock Generation
Two TTL Clock Inputs for 40-DIP
Two XTAL oscillator circuits for
44-Quad, PLCC
User programmable Track Stepping
Rate and Head load/unload time
Drivers up to four Floppy or micro
Floppy Disk Drives
Data transfer DMA or non-DMA
mode
Parallel seek operations on up to
four Drives
Internal power up reset circuitry
READ/WRITE access compatible
register with 8 or 12MHz 286
microprocessor with 0 wait states.
DMA timing corrected.
LOW POWER CMOS, +5V SUPPLY
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