FDC37C669-MT datasheet(18/162 Pages) MICROCHIP

18 / 162 page

FLOPPY DISK CONTROLLER

The Floppy Disk Controller (FDC) provides the interface

between a host microprocessor and the floppy disk

drives.

The FDC integrates the functions of the

Formatter/Controller,

Digital

Data

Separator,

Write

Precompensation and Data Rate Selection logic for an

IBM XT/AT compatible FDC. The true CMOS 765B core

guarantees 100% IBM PC XT/AT compatibility in addition

to providing data overflow and underflow protection.

The FDC37C669 is

compatible

the 82077AA

using SMSC's proprietary floppy disk controller core.

FLOPPY DISK CONTROLLER INTERNAL REGISTERS

The Floppy Disk Controller contains eight internal

registers which facilitate the interfacing between the host

microprocessor and the disk drive. Table 2 shows the

addresses required to access these registers. Registers

other than the ones shown are not supported. The rest of

the FDC description assumes the Base I/O Address is

3F0.

Table 2 - Status, Data and Control Registers

BASE I/O

ADDRESS

R/W

Status Register A

Status Register B

Digital Output Register

Tape Drive Register

Main Status Register

Data Rate Select Register

Data (FIFO)

Reserved

Digital Input Register

Configuration Control Register

SRA

SRB

DOR

TSR

MSR

DSR

FIFO

DIR

CCR

For information on the floppy disk on Parallel Port pins, refer to Configuration Register CR4 and Parallel Port

Floppy Disk Controller description.

FDC37C669-MT Datasheet(PDF) 18 Page - Microchip Technology

FDC37C669-MT Datasheet(HTML) 18 Page - Microchip Technology

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL