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参数资料
| 型号： | LM85BIMQ/NOPB |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | 模拟信号调理 |
| 英文描述： | SPECIALTY ANALOG CIRCUIT, PDSO24 |
| 封装： | QSOP-24 |
| 文件页数： | 15/26页 |
| 文件大小： | 261K |
| 代理商： | LM85BIMQ/NOPB |
Functional Description (Continued)
4.19 Registers 6A-6Ch: Absolute Temperature Limit
Register
Address
Read/
Write
Register
Name
Bit 7
(MSB)
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
(LSB)
Default
Value
Lock?
6Ah
R/W
Zone1 Absolute Temp Limit
7
654321
0
64h
U
6Bh
R/W
Zone2 Absolute Temp Limit
7
654321
0
64h
U
6Ch
R/W
Zone3 Absolute Temp Limit
7
654321
0
64h
U
For the LM85B in the Auto Fan mode, if a zone exceeds the temperature set in the Absolute Temperature Limit register, all of the
PWM outputs will incresase its duty cycle to 100%. This is a safety feature that attempts to cool the system if there is a potentially
catastrophic thermal event. If set to 80h (-128C), the feature is disabled. Default=100C=64h
For the LM85C in the Auto Fan mode, if a zone exceeds the temperature set in the Absolute Temperature Limit register, only the
PWM output associated with the Absolute Temperature Limit will go to 100%.
These registers become Read Only when the Ready/Lock/Start/Override register Lock bit is set. Any further attempts to write to
these registers shall have no effect. After power up the default values are used whenever the Ready/Lock/Start/Override register
Start bit is cleared even though modifications to these registers are possible.
TABLE 11. Absolute Limit vs Register Setting
Temperature
Reading (Decimal)
Reading (Hex)
127C
127
81h
.
50C
50
CEh
.
0C
0
00h
.
50C
50
32h
.
127C
127
7Fh
4.20 Registers 6D-6Eh: Zone Hysteresis Registers
Register
Address
Read/
Write
Register
Name
Bit 7
(MSB)
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
(LSB)
Default
Value
Lock?
6Dh
R/W
Zone1 and Zone2 Hysteresis
H1-3
H1-2
H1-1
H1-0
H2-3
H2-2
H2-1
H2-0
44h
U
6Eh
R/W
Zone3 Hysteresis
H3-3
H3-2
H3-1
H3-0
RES
40h
U
If the temperature is above Fan Temp Limit, then drops below Fan Temp Limit, the following will occur:
– The fan will remain on, at Fan PWM Minimum, until the temperature goes a certain amount below Fan Temp Limit.
– The Hysteresis registers control this amount. See below table for details.
These registers become Read Only when the Ready/Lock/Start/Override register Lock bit is set. Any further attempts to write to
thses registers shall have no effect. After power up the default value is used whenever the Ready/Lock/Start/Override register
Start bit is cleared even though modifications to this register are possible.
TABLE 12. Hysteresis Settings
Setting
HYSTERESIS
0h
0C
LM85
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相关代理商/技术参数 |
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| LM86 | 制造商:NSC 制造商全称:National Semiconductor 功能描述:【0.75∑C Accurate, Remote Diode and Local Digital Temperature Sensor with Two-Wire Interface |
| LM86CIM | 功能描述:板上安装温度传感器 RoHS:否 制造商:Omron Electronics 输出类型:Digital 配置: 准确性:+/- 1.5 C, +/- 3 C 温度阈值: 数字输出 - 总线接口:2-Wire, I2C, SMBus 电源电压-最大:5.5 V 电源电压-最小:4.5 V 最大工作温度:+ 50 C 最小工作温度:0 C 关闭: 安装风格: 封装 / 箱体: 设备功能:Temperature and Humidity Sensor |
| LM86CIM/NOPB | 功能描述:板上安装温度传感器 RoHS:否 制造商:Omron Electronics 输出类型:Digital 配置: 准确性:+/- 1.5 C, +/- 3 C 温度阈值: 数字输出 - 总线接口:2-Wire, I2C, SMBus 电源电压-最大:5.5 V 电源电压-最小:4.5 V 最大工作温度:+ 50 C 最小工作温度:0 C 关闭: 安装风格: 封装 / 箱体: 设备功能:Temperature and Humidity Sensor |
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