參數(shù)資料
型號(hào)： LM81
廠商： National Semiconductor Corporation
英文描述： Serial Interface ACPI-Compatible Microprocessor System
中文描述： 串行接口ACPI的兼容微處理器系統(tǒng)
文件頁(yè)數(shù)： 11/32頁(yè)
文件大小： 412K
代理商： LM81
Functional Description
(Continued)
2.1 Internal Registers of the LM81
TABLE 1. The internal registers and their corresponding internal LM81 addresses are as follows:
Register
LM81 Internal Hex
Address
40h
41h
42h
43h
44h
46h
47h
Power on
Value
0000 1000
0000 0000
0000 0000
0000 0000
0000 0000
0000 0000
0101 XXXX
Notes
Configuration Register
Interrupt Status Register 1
Interrupt Status Register 2
Interrupt Mask Register 1
Interrupt Mask Register 2
CI Clear Register
VID/Fan Divisor Register
The upper four bits set the divisor for Fan Counters 1
and 2. The lower four bits reflect the state of the
VID0-VID3 inputs.
The lower 2 bits reflect the state of A1 and A0, the
Serial Bus address input pins.
The lower bit reflects the state of VID4 input.
Serial Bus Address Register
48h
0010 11XX
VID4 Register
Temperature Configuration
Register
Extended Mode Register 1
Extended Mode Register 2
Value RAM DAC Data
Register
Value RAM
49h
4Bh
1000 000X
0000 0001
4Ch
4Dh
19h
0100 0100
0000 0000
1111 1111
20h-3Fh
Contains: monitoring results (temperature, voltages,
fan counts), WATCHDOG limits, and
Company/Stepping IDs
www.national.com
11
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