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WD1691

Western Digital
Part Number WD1691
Manufacturer Western Digital
Description FLOPPY SUPPORT LOGIC
Published Dec 9, 2019
Detailed Description WESTERN DIGITAL c oR p o R A T oN WD1691 FLOPPY SUPPORT LOGIC (F.S.L.) FEATURES .. Direct interface to the FD179X • ...
Datasheet PDF File WD1691 PDF File

WD1691
WD1691

Overview
WESTERN DIGITAL c oR p o R A T oN WD1691 FLOPPY SUPPORT LOGIC (F.
S.
L.
) FEATURES .
.
Direct interface to the FD179X • Eliminates external FDC Logic .
.
Data Separation/RCLK GENERATION .
.
Write Precompensation Signals • VFOE/WF Demultiplexing • Programmable Density o 8" or 5.
25" Drive Compatible .
.
All inputs and outputs TTL Compatible .
.
.
Single +5V Supply GENERAL DESCRIPTION The WD1691 F.
S.
L.
has been designed to minimize the external logic required to interface the 179X Family of Floppy Disk Controllers to a drive.
With the use of an external VCO, the WD 1691 will generate the RCLK signal for the WD179X, while providing an adjustment pulse (PUMP) to control the VCO frequency.
VFOE/WF de-...


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