EMC1103_08 Datasheet, PDF (1/3 Pages) SMSC Corporation – SST Compliant Hardware Monitor

EMC1103
SST Compliant
Hardware Monitor with
Three Temperature
Channels
PRODUCT FEATURES
Data Brief
General Description
The EMC1103 is a one-wire sensor that is capable of
monitoring up to 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.
Applications
„ Desktop PCs, Servers and Workstations
Features
„ Single Wire Interface (SST based)
— SST 1.0 compliant
— Fixed Address, Discoverable Device
— Nine programmable addresses
— Supports FCS Abort functionality not available in SST
0.9 compliant devices
„ 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.
„ Internal Temperature Monitor
— Range -40°C to +125°C
— 0.125°C resolution
— ±2°C Accuracy (40°C to 70°C)
„ Supply
— 3.0V to 3.6V
Simplified Block Diagram
Switching
Current
DP1
DN1
DP2
DN2
Internal
Temp
Diode
EMC1103
11-bit
delta-sigma
ADC
External 1
Temp Register
External 2
Temp Register
Internal Temp
Register
Configuration
Register
Digital Mux
and
Byte Interlock
Status Register
ADD1
ADD0
SST
SMSC EMC1103
PRODUCT PREVIEW
Revision 2.7 (07-15-08)