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參數(shù)資料
| 型號(hào)： | 37C67X |
| 廠商： | SMSC Corporation |
| 英文描述： | ENHANCED SUPER I/O CONTROLLER WITH FAST IR |
| 中文描述： | 增強(qiáng)的超級(jí)I / O控制器，快速紅外線 |
| 文件頁(yè)數(shù)： | 38/194頁(yè) |
| 文件大小： | 546K |
| 代理商： | 37C67X |
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132
CONFIGURATION
The Configuration of the FDC37C67x is very
flexible and is based on the configuration
architecture implemented in typical Plug-and-
Play components. The FDC37C67x is designed
for
motherboard
applications
in
which
the
resources required by their components are
known.
With its flexible resource allocation
architecture, the FDC37C67x allows the BIOS to
assign resources at POST.
SYSTEM ELEMENTS
Primary Configuration Address Decoder
After a hard reset (RESET_DRV pin asserted) or
Vcc Power On Reset the FDC37C67x is in the
Run Mode with all logical devices disabled. The
logical devices may be configured through two
standard Configuration I/O Ports (INDEX and
DATA)
by
placing
the FDC37C67x into
Configuration Mode.
The BIOS uses these
configuration
ports
to
initialize
the
logical
devices at POST. The INDEX and DATA ports
are only valid when the FDC37C67x is in
Configuration Mode.
The SYSOPT pin is latched on the falling edge
of the RESET_DRV or on Vcc Power On Reset
to determine the configuration register's base
address. The SYSOPT pin is used to select the
CONFIG
PORT's
I/O address at power-up.
Once powered up the configuration port base
address can be changed through configuration
registers CR26 and CR27. The SYSOPT pin
is a hardware configuration pin which is
shared with the nRTS1 signal on pin 87.
During reset this pin is a weak active low signal
which sinks 30A. Note: All I/O addresses are
qualified with AEN.
The INDEX and DATA ports are effective only
when the chip is in the Configuration State.
PORT NAME
SYSOPT= 0
(Pull-down resistor)
Refer to Note 1
SYSOPT= 1
(10K Pull-up resistor)
TYPE
CONFIG PORT (Note 2)
0x03F0
0x0370
Write
INDEX PORT (Note 2)
0x03F0
0x0370
Read/Write
DATA PORT
INDEX PORT + 1
Read/Write
Note 1:
If using TTL RS232 drivers use 1K pull-down. If using CMOS RS232 drivers use
10K pull-down.
Note 2:
The configuration port base address can be relocated through CR26 and CR27.
Entering the Configuration State
The device enters the Configuration State when
the following Config Key is successfully written
to the CONFIG PORT.
Config Key = < 0x55 >
Exiting the Configuration State
The device exits the Configuration State when
the following Config Key is successfully written
to the CONFIG PORT.
Config Key = < 0xAA>
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