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| 型号： | LM80CIMTX-32 |
| 厂商： | National Semiconductor Corporation |
| 英文描述： | Serial Interface ACPI-Compatible Microprocessor System Hardware Monitor |
| 中文描述： | 串行接口ACPI的兼容微处理器系统硬件监视器 |
| 文件页数： | 9/29页 |
| 文件大小： | 412K |
| 代理商： | LM80CIMTX-32 |
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Functional Description (Continued)
By default Temperature Register data is represented by a
9-bit two’s complement digital word with the LSB having a
resolution of 0.5C:
Temperature
Digital Output
Binary
Hex
+125C
0 1111 1010
0 FAh
+25C
0 0011 0010
0 32h
+1.5C
0 0000 0011
0 03h
+0C
0 0000 0000
0 00h
0.5C
1 1111 1111
1 FFh
25C
1 1100 1110
1 CEh
55C
1 1001 0010
1 92h
Temperature Register data can also be represented by a
12-bit two’s complement digital word with a LSB of 0.0625C:
Temperature
Digital Output
Binary
Hex
+125C
0111 1100 0000
7 D0h
+25C
0001 1001 0000
1 90h
+1.0C
0000 0001 0000
0 10h
+0.0625C
0000 0000 0001
0 01h
0C
0000 0000 0000
00h
0.0625C
1111 1111 1111
F FFh
1.0C
1111 1111 0000
F F0h
25C
1110 0111 0000
E 70h
55C
1100 1001 0000
C 90h
The 8 MSBs of the Temperature reading can be found at
Value RAM address 28 h. The remainder of the Temperature
reading can be found in the OS Configuration/Temperature
Resolution Register bits 7-4. In 9-bit format bit 7 is the only
valid bit.
7.2 Temperature Interrupts
There are four Value RAM WATCHDOG limits for the Tem-
perature reading that affect the INT and OS outputs of the
LM80. They are: Hot Temperature Limit, Hot Temperature
Hysteresis Limit, OS Limit, OS Hysteresis Limit. There are
three interrupt modes of operation: “One-Time Interrupt”
mode, “Default Interrupt” mode, and “Comparator Mode”.
The OS output of the LM80 can be programmed for
“One-Time Interrupt” mode and “Comparator” mode. INT can
be programmed for “Default Interrupt” mode and “One-Time”
Interrupt.
“Default Interrupt mode” operates in the following way: Ex-
ceeding T
hot causes an Interrupt that will remain active in-
definitely until reset by reading Interrupt Status Register 1 or
cleared by the INT_Clear bit in the Configuration register.
Once an Interrupt event has occurred by crossing T
hot, then
reset, an Interrupt will occur again once the next temperature
conversion has completed. The interrupts will continue to oc-
cur in this manner until the temperature goes below T
hot hyst,
at which time the Interrupt output will automatically clear.
“One-Time Interrupt” mode operates in the following way:
Exceeding T
hot causes an Interrupt that will remain active in-
definitely until reset by reading Interrupt Status Register 1 or
cleared by the INT_Clear bit in the Configuration register.
Once an Interrupt event has occurred by crossing T
hot, then
reset, an Interrupt will not occur again until the temperature
goes below T
hot hyst.
“Comparator” mode operates in the following way: Ex-
ceeding T
os causes the OS output to go Low (default). OS
will remain Low until the temperature goes below T
os. Once
the temperature goes below T
os, OS
will go High.
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相关代理商/技术参数 |
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| LM80CIMTX-5 | 功能描述:监控电路 RoHS:否 制造商:STMicroelectronics 监测电压数: 监测电压: 欠电压阈值: 过电压阈值: 输出类型:Active Low, Open Drain 人工复位:Resettable 监视器:No Watchdog 电池备用开关:No Backup 上电复位延迟（典型值）:10 s 电源电压-最大:5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UDFN-6 封装:Reel |
| LM80CIMTX-5/NOPB | 功能描述:监控电路 RoHS:否 制造商:STMicroelectronics 监测电压数: 监测电压: 欠电压阈值: 过电压阈值: 输出类型:Active Low, Open Drain 人工复位:Resettable 监视器:No Watchdog 电池备用开关:No Backup 上电复位延迟（典型值）:10 s 电源电压-最大:5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UDFN-6 封装:Reel |
| LM80CIMTX-52 | 制造商:NSC 制造商全称:National Semiconductor 功能描述:Serial Interface ACPI-Compatible Microprocessor System Hardware Monitor |
| LM80EVAL | 功能描述:EVALUATION BOARD FOR LM80 RoHS:是 类别:编程器，开发系统 >> 评估演示板和套件 系列:PowerWise® 产品培训模块:Obsolescence Mitigation Program 标准包装:1 系列:- 主要目的:电源管理，电池充电器 嵌入式:否 已用 IC / 零件:MAX8903A 主要属性:1 芯锂离子电池 次要属性:状态 LED 已供物品:板 |
| LM81 | 制造商:NSC 制造商全称:National Semiconductor 功能描述:Serial Interface ACPI-Compatible Microprocessor System Hardware Monitor |
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