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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： | 3/29页 |
| 文件大小： | 412K |
| 代理商： | LM80CIMTX-32 |
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Functional Description (Continued)
2.2 Serial Bus Interface
The Serial Bus control lines consists of the SDA (serial data),
SCL (serial clock) and A0-A1 (address) pins. The LM80 can
only operate as a slave. The SCL line only controls the serial
interface, all other clock functions within LM80 such as the
ADC and fan counters are done with a separate asynchro-
nous internal clock.
When using the Serial Bus Interface a write will always con-
sist of the LM80 Serial Bus Interface Address byte, followed
by the Internal Address Register byte, then the data byte.
There are two cases for a read:
1.
If the Internal Address Register is known to be at the de-
sired Address, simply read the LM80 with the Serial Bus
Interface Address byte, followed by the data byte read
from the LM80.
2.
If the Internal Address Register value is unknown, write
to the LM80 with the Serial Bus Interface Address byte,
followed by the Internal Address Register byte. Then re-
start the Serial Communication with a Read consisting of
the Serial Bus Interface Address byte, followed by the
data byte read from the LM80.
The default power on Serial Bus address for the LM80 is:
0101(A2)(A1)(A0) binary, where A0-A2 reflect the state of
the pins defined by the same names.
All of these communications are depicted in the Serial Bus
Interface Timing Diagrams as shown in
Figure 5.
DS100040-8
(a) Serial Bus Write to the Internal Address Register followed by the Data Byte
DS100040-9
(b) Serial Bus Write to the Internal Address Register Only
DS100040-10
(c) Serial Bus Read from a Register with the Internal Address Register Preset to Desired Location
FIGURE 5. Serial Bus Timing
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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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