FDC1765-02 Datasheet | SMSC

STANDARD MICROSYSTEMS CORPORATION Floppy Disk Controller/Formatter FOe FOC 1761-02 FOC 1763-02 FOC 1765-02 FOC 1767-02 j1PC FAMILY Features o 1 MHZ VERSION OF FDC 179X o SOFT SECTOR FORMAT PATIBILITY o AUTOMATIC TRACK SEEK WITH VERIFICATION o ACMODATES SINGLE AND DOUBLE DENSITY FORMATS IBM 3740 Single Density (FM) IBM System 34 Double Density (MFM) o READ MODE Single/Multiple Sector Read with Automatic Search or Entire Track Read Selectable 128 Byte or Variable Length Record o WRITE MODE Single/Multiple Sector Write with Automatic Sector Search Entire Track Write for Diskette Initialization o PROGRAMMABLE CONTROLS Selectable Track to Track Stepping Time Side Select pare o SYSTEM PATIBILITY Double Buffering of Data 8 Bit Bi-Directional Bus for Data, Control and Status DMA or Programmed Data Transfers All Inputs and Outputs are TTL patible On-chip Track and Sector Registers/prehensive Status Information o WRITE PREPENSATION (MFM AND FM) o SIDE SELECT LOGIC (FDC 1765, FDC 1767) o WINDOW EXTENSION (IN MFM) PIN CONFIGURATION Wcs E A" A, DAL O' DAL l' DAL 2' DAL3' DAL4' DALS' DAL 6' DAL 7' STEP DIRC EARLY LATE MR GND - 12V INTRa ORO DDEN WPRT i F' TROO WF READY WD WG TG43 Hl D RAW READ RCLK RG/SSO Cl K HLT TEST - SV 'INVERTED BUS FOR FOC 1761. FOC 176S PACKAGE 40 Pin D.I.P. I o INCORPORATES ENCODING/DECODING AND ADDRESS MARK CIRCUITRY o PATIBLE WITH FD176X-02 o COPLAMOS® n-CHANNEL MOS TECHNOLOGY o PATIBLE WITH THE FDC 9216 FLOPPY DISK DATA SEPARATOR GENERAL DESCRIPTION The FDC 176X is an MOS/LSI device which performs the functions of a Floppy Disk Controller/Formatter in a single chip implementation. The basic FDC 176X chip design has evolved into four specific parts: FDC 1761, FDC 1763, FDC 1765, and the FDC 1767.. It is a 1MHz version of the FDC 179X family. '~.~,,) This FDC family performs all the functions necessary to read or write data to a floppy disk drive. 5114" (minifloppy) drives with single or double density storage...