FDC37C669-MS Standard Microsystems (SMSC), FDC37C669-MS Datasheet - Page 113

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

Specifications of FDC37C669-MS

• Pin Count: 100
• Lead Free Status / RoHS Status: Compliant

The IDE interface enables hard disks with embedded
controllers (AT and XT) to be interfaced to the host
processor.
only.
FDC37C669.
the FDC37C669. For more 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
These registers are not implemented in the
The following definitions are for reference
Access to these registers is controlled by
FIGURE 2 - HOST PROCESSOR REGISTER ADDRESS MAP (AT MODE)
INTEGRATED DRIVE ELECTRONICS INTERFACE
REGISTER ADDRESS
(CR21) IDE BASE I/O
(CR22) BASE I/O
ADDRESS +[0:7]
ADDRESS +6
113
TASK FILE REGISTERS
ADDRESS (CR21) Base +[0:7]
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 (CR22) Base +6
This AT register may be used by the BIOS for drive
control. It is accessed by the AT interface when nHDSC1
is active.
Figure 2 shows the AT Host Register Map of the
FDC37C669.
compatible.
specifications. These are available from:
MISC AT REGISTER
Global Engineering
2805 McGaw Street
Irvine, CA 92714
[phone]
[phone]
Please refer to the ATA and EATA