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| 型号： | ADM1033ARQZ |
| 厂商： | Analog Devices, Inc. |
| 英文描述： | Thermal Monitor and Fan Speed (RPM) Controller |
| 中文描述： | 热监测和风扇转速（RPM）控制器 |
| 文件页数： | 2/40页 |
| 文件大小： | 1164K |
| 代理商： | ADM1033ARQZ |
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ADM1033
TABLE OF CONTENTS
General Description.........................................................................3
Rev. 0 | Page 2 of 40
Specifications.....................................................................................4
Absolute Maximum Ratings............................................................6
Thermal Characteristics..............................................................6
ESD Caution..................................................................................6
Pin Configuration and Function Descriptions.............................7
Typical Performance Characteristics.............................................8
Functional Description..................................................................10
Internal Registers........................................................................10
Serial Bus Interface.....................................................................10
LOCATION Input......................................................................10
SMBus 2.0 ARP-Capable Mode................................................10
SMBus 2.0 Fixed-and-Discoverable Mode..............................12
SMBus 2.0 Read and Write Operations...................................12
Register Addresses for Single/Block Byte Modes...................14
Write Operations........................................................................14
Read Operations.........................................................................15
SMBus Timeout..........................................................................15
Packet Error Checking (PEC)...................................................15
Alert Response Address (ARA)................................................15
Temperature Measurement System..............................................16
Internal Temperature Measurement........................................16
Remote Temperature Measurement.........................................16
Additional Functions.................................................................18
Layout Considerations...................................................................19
Limits, Status Registers, and Interrupts .......................................20
8-Bit Limits..................................................................................20
Out-of-Limit Comparisons.......................................................20
Analog Monitoring Cycle Time................................................20
Status Registers...........................................................................20
ALERT Interrupt Behavior........................................................21
Handling SMBusALERT Interrupts......................................... 22
Interrupt Masking Register....................................................... 22
FAN_FAULT Output ................................................................. 23
Fault Queue................................................................................. 23
Conversion Rate Register.......................................................... 23
THERM I/O Timer and Limits................................................ 23
THERM % Limit Register......................................................... 24
Fan Drive Signal......................................................................... 25
Synchronous Speed Control..................................................... 25
Fan Inputs.................................................................................... 26
Fan Speed Measurement ........................................................... 26
Fan Speed Measurement Registers........................................... 27
Reading Fan Speed..................................................................... 27
Calculating Fan Speed............................................................... 27
Alarm Speed................................................................................ 27
Look-Up Table: Modes of Operation....................................... 28
Look-Up Table............................................................................ 28
Setting Up the Look-Up Table in Linear Mode...................... 29
Selecting which Temperature Channel Controls a Fan......... 29
Look-Up Table Hysteresis......................................................... 29
Programming the THERM Limit for Temperature Channels
....................................................................................................... 30
XOR Tree Test Mode.................................................................. 30
Lock Bit........................................................................................ 30
SW Reset...................................................................................... 30
Outline Dimensions....................................................................... 39
Ordering Guide .......................................................................... 39
REVISION HISTORY
8/04—Revision 0: Initial Version
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