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參數(shù)資料
| 型號： | 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) |
| 文件頁數(shù)： | 30/32頁 |
| 文件大小： | 412K |
| 代理商： | LM81 |
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Functional Description
(Continued)
13.16 Value RAM— Address 15h–3Fh
Address A6–A0
15h
19h
20h
21h
22h
23h
24h
25h
26h
27h
28h
Description
Manufacturers Test Register
DAC data register; power on default
<
7:0
>
=1111 1111 binary
+2.5Vin reading
Vccp1 reading
+3.3Vin reading
+5Vin reading
+12Vin reading
Vccp2 reading
Reserved reading
Temperature reading (8 MSBs)
FAN1 reading
Note:
This location stores the number of counts of the internal clock per revolution.
FAN2 reading
Note:
This location stores the number of counts of the internal clock per revolution.
Reserved
+2.5Vin High Limit
+2.5Vin Low Limit
Vccp1 High Limit
Vccp1 Low Limit
+3.3Vin High Limit
+3.3Vin Low Limit
+5Vin High Limit
+5Vin Low Limit
+12Vin High Limit
+12Vin Low Limit
Vccp2 High Limit
Vccp2 Low Limit
T_CRIT Limit (Extended Mode)
LOW Limit (Extended Mode)
HIGH Temperature Limit
HIHYST Temperature Limit
FAN1 Fan Count Limit
Note:
It is the number of counts of the internal clock for the Low Limit of the fan speed.
FAN2 Fan Count Limit
Note:
It is the number of counts of the internal clock for the Low Limit of the fan speed.
Reserved
Company Identification. The number in this register identifies National Semiconductor (0000 0001)
Stepping Register LM81 revision number (0000 0011)
29h
2Ah
2Bh
2Ch
2Dh
2Eh
2Fh
30h
31h
32h
33h
34h
35h
36h
37h
38h
39h
3Ah
3Bh
3Ch
3Dh
3Eh
3Fh
Note:
Setting all ones to the high limits for voltages and fans (0111 1111 binary for temperature) means interrupts will
never
be generated except the case when volt-
ages go below the low limits.
For voltage input high limits, the device is doing a greater than comparison. For low limits, however, it is doing a less than or equal to comparison.
www.national.com
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