FDC37C78-HT Standard Microsystems (SMSC), FDC37C78-HT Datasheet - Page 11

• Manufacturer Part Number: FDC37C78-HT
• Manufacturer: Standard Microsystems (SMSC)

Specifications of FDC37C78-HT

• Package Type: TQFP
• Lead Free Status / RoHS Status: Compliant

FLOPPY DISK CONTROLLER
The Floppy Disk Controller (FDC) provides the
interface between a host microprocessor and the
floppy disk drives.
functions of the Formatter/Controller, Digital Data
Separator, Write Precompensation and Data Rate
Selection logic for an IBM XT/AT compatible FDC.
PC XT/AT compatibility in addition to providing
data overflow and underflow protection.
The true CMOS 765B core guarantees 100% IBM
ADDRESS
BASE I/O
+0
+1
+2
+3
+4
+4
+5
+6
+7
+7
The FDC integrates the
Table 2 - Status, Data and Control Registers
R/W
R/W
R/W
W
W
R
R
Reserved
Reserved
Digital Output Register
Tape Drive Register
Main Status Register
Data Rate Select Register
Data (FIFO)
Reserved
Digital Input Register
Configuration Control Register
11
REGISTER
The
82077AA using SMSC's proprietary floppy disk
controller core.
FLOPPY
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.
description assumes the Base I/O Address is 3F0.
FDC37C78
DISK
CONTROLLER
is
The rest of the FDC
compatible
DOR
MSR
FIFO
DSR
CCR
TSR
DIR
INTERNAL
to
the