FDC37C665IR SMSC Corporation, FDC37C665IR Datasheet - Page 116

• Manufacturer Part Number: FDC37C665IR
• Description: 3/5 Volt Advanced High-Performance Multi-Mode Parallel Port Super I/O Floppy Disk Controller with Infranred Support
• Manufacturer: SMSC Corporation

The IDE interface enables hard disks with
embedded controllers (AT and XT) to be
interfaced to the host processor. The following
definitions are for reference only.
registers
FDC37C665IR.
controlled by the FDC37C665IR.
information, refer to the IDE pin descriptions
and the ATA specification.
HOST FILE REGISTERS
The HOST FILE REGISTERS are accessed by
the AT Host, rather than the Local Processor.
There are two groups of registers, the AT Task
File, and the Miscellaneous AT Registers.
TASK FILE REGISTERS
Task File Registers may be accessed by the
host AT when pin nHDCS0 is active (low). The
Data Register (1F0H) is 16 bits wide; the
remaining task file registers are 8 bits wide. The
task file registers are ATA and EATA
are
FIGURE 3 - HOST PROCESSOR REGISTER ADDRESS MAP (AT MODE)
Access to these registers is
not
PRIMARY
1F0H
1F7H
3F6H
3F7H
INTEGRATED DRIVE ELECTRONICS INTERFACE
implemented
SECONDARY
For more
170H
177H
376H
377H
in
These
the
116
ADDRESS 1F0H-1F7H; 170H-177H
These AT registers contain the Task File
Registers. These registers communicate data,
command, and status information with the AT
host, and are addressed when nHDCS0 is low.
ADDRESS 376H/3F6H; 377H/3F7H
These AT registers may be used by the BIOS for
drive control.
interface when nHDSC1 is active.
Figure 3 shows the AT Host Register Map of the
FDC37C665IR.
compatible. Please refer to the ATA and EATA
specifications. These are available from:
Global Engineering
2805 McGaw Street
Irvine, CA 92714
[phone]
[phone]
TASK FILE REGISTERS
MISC. AT REGISTERS
They are accessed by the AT