參數(shù)資料
型號: 37C669
廠商: SMSC Corporation
英文描述: DIODE SCHOTTKY SINGLE 25V 200mW 0.5V-vf 200mA-IFM 30mA-IF 2uA-IR SOD-323 3K/REEL
中文描述: 電腦98/99順從超級I / O軟盤控制器與紅外線支持
文件頁數(shù): 74/164頁
文件大?。?/td> 621K
代理商: 37C669
17
FUNCTIONAL DESCRIPTION
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
ports
can
be
moved
via
the
configuration registers.
Some addresses are
used to access more than one register.
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.
Register access is
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.
Table 1 - FDC37C669 Block Addresses
ADDRESS
BLOCK NAME
NOTES
3F0, 3F1 or 370, 371
Configuration
Write only; Note 1, 2
Base +0,1
Floppy Disk
Read only; Disabled at power
up; Note 2
Base +[2:5, 7]
Floppy Disk
Disabled at power up; Note 2
Base +[0:7]
Serial Port Com 1
Disabled at power up; Note 2
Base +[0:7]
Serial Port Com 2
Disabled at power up; Note 2
Base +[0:3] all modes
Base +[4:7] for EPP
Base +[400:403] for ECP
Parallel Port
Disabled at power up; Note 2
Base1 +[0:7]
Base2 +[6]
IDE
Disabled at power up; Note 2
Note 1:
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.
Note 2:
The base addresses must be set in the configuration registers before accessing the logical
devices.
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