FDC37C669_07 SMSC [SMSC Corporation], FDC37C669_07 Datasheet - Page 17

• Manufacturer Part Number: FDC37C669_07
• Description: PC 98/99 Compliant Super I/O Floppy Disk Controller with Infrared Support
• Manufacturer: SMSC [SMSC Corporation]

SUPER I/O REGISTERS
The address map, shown below in Table 1,
shows the addresses of the different blocks of
the Super I/O immediately after power up. The
base addresses of the FDC, IDE, serial and
parallel
configuration registers.
used to access more than one register.
Note 1:
Note 2:
3F0, 3F1 or 370, 371
Base +0,1
Base +[2:5, 7]
Base +[0:7]
Base +[0:7]
Base +[0:3] all modes
Base +[4:7] for EPP
Base +[400:403] for ECP
Base1 +[0:7]
Base2 +[6]
ports
Configuration registers can only be modified in configuration mode, refer to the
configuration register description for more information. Access to status registers A and B
of the floppy disk is disabled in configuration mode.
The base addresses must be set in the configuration registers before accessing the logical
devices.
can
ADDRESS
be
Some addresses are
moved
Table 1 - FDC37C669 Block Addresses
FUNCTIONAL DESCRIPTION
via
Configuration
Floppy Disk
Floppy Disk
Serial Port Com 1
Serial Port Com 2
Parallel Port
IDE
BLOCK NAME
the
17
HOST PROCESSOR INTERFACE
The host processor communicates with the
FDC37C669 through a series of read/write
registers. The port addresses for these registers
are shown in Table 1.
accomplished through programmed I/O or DMA
transfers. All registers are 8 bits wide except
the IDE data register at port 1F0H which is 16
bits wide. All host interface output buffers are
capable of sinking a minimum of 12 mA.
Write only; Note 1, 2
Read only; Disabled at power
up; Note 2
Disabled at power up; Note 2
Disabled at power up; Note 2
Disabled at power up; Note 2
Disabled at power up; Note 2
Disabled at power up; Note 2
NOTES
Register access is