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EMC1133

Description
SST Compliant Hardware Monitor with Three Temperature Channels and Three Voltage Channels
File Size191KB,3 Pages
ManufacturerSMSC
Websitehttp://www.smsc.com/
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EMC1133 Overview

SST Compliant Hardware Monitor with Three Temperature Channels and Three Voltage Channels

EMC1133
SST Compliant
Hardware Monitor with
Three Temperature
Channels and Three
Voltage Channels
PRODUCT FEATURES
General Description
The EMC1133 is a one-wire sensor that is capable of
monitoring up to three voltages and three temperature
zones for an Intel PC platform containing an SST host.
The three temperature zones consist of an internal
temperature diode and two externally connected
temperature diodes. In cooperation with a host device,
thermal management and fan control can be performed.
Communication takes place over a one-wire SST based
interface. The internal 11-bit delta-sigma ADC
architecture provides superb linearity, high accuracy,
and excellent noise immunity.
Resistance Error Correction
Ideality Configuration
Beta Compensation
Two External Temperature Monitors
0.125°C resolution
±1°C Accuracy (50°C to 70°C)
Diode Fault Reporting
Second External Diode configured to read a discrete
diode.
Data Brief
Internal Temperature Monitor
— Range -40°C to +125°C
— 0.125°C resolution
— ±2°C Accuracy (40°C to 70°C)
Applications
Desktop PCs, Servers and Workstations
Voltage Monitor:
— 3.3V, 2.5V, VCCP inputs
— 2% Total Unadjusted Error
— 11-bit resolution
Features
Single Wire Interface (SST based)
SST 1.0 compliant
Fixed Address, Discoverable Device
Three programmable addresses
Supports FCS Abort functionality not available in SST
0.9 compliant devices
Supply
— 3.0V to 3.6V
Simplified Block Diagram
Switching
Current
DP1
DN1
DP2
DN2
Internal
Temp
Diode
Attenuator
bank
3.3V
2.5V
VCCP
Analog Mux
and Anti-Alias Filter
External Temp
Registers
EMC1133
Configuration
Register
SST One-Wire Interface
ADD
11-bit
delta-sigma
ADC
Internal Temp
Register
Digital Mux
and
Byte Interlock
Voltage
Registers
SST
Status Register
SMSC EMC1133
PRODUCT PREVIEW
Revision 2.58 (08-01-07)

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