FDC37C669-MS Standard Microsystems (SMSC), FDC37C669-MS Datasheet - Page 18

• Manufacturer Part Number: FDC37C669-MS
• Manufacturer: Standard Microsystems (SMSC)

Specifications of FDC37C669-MS

• Pin Count: 100
• 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.
Formatter/Controller,
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
using SMSC's proprietary floppy disk controller core.
For information on the floppy disk on Parallel Port pins, refer to Configuration Register CR4 and Parallel Port
Floppy Disk Controller description.
The FDC integrates the functions of the
ADDRESS
Digital
BASE I/O
compatible
+0
+1
+2
+3
+4
+4
+5
+6
+7
+7
Table 2 - Status, Data and Control Registers
Data
Separator,
to
R/W
R/W
R/W
W
W
R
R
R
R
the 82077AA
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
Write
18
REGISTER
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.
DOR
MSR
FIFO
DSR
CCR
SRA
SRB
TSR
DIR