EMC1152
SST Compliant
Hardware Monitor with
Two Temperature
Channels and Five
Voltage Channels
PRODUCT FEATURES
GENERAL DESCRIPTION
The EMC1152 is a one-wire sensor that is capable of
monitoring up to five voltages and two temperature
zones for an Intel PC platform containing an SST host.
The two temperature zones consist of an internal
temperature diode and an externally connected
temperature diode. 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
Three programmable addresses
Supports FCS Abort functionality not available in SST
0.9 compliant devices
Data Brief
Resistance Error Correction
Ideality Configuration
Beta Compensation (EMC1152-1)
— EMC1152 configured to measure 2N3904 diode
— EMC1152-1 configured to measure CPU substrate
diode
External Temperature Monitor
— 0.125°C resolution
— ±1°C Accuracy (50°C to 70°C)
— Diode Fault Reporting
Internal Temperature Monitor
— Range -40°C to +125°C
— 0.125°C resolution
— ±2°C Accuracy (40°C to 70°C)
Voltage Monitor:
— 12V, 5V, 3.3V, 2.5V, VCCP inputs
— 2% Total Unadjusted Error
— 11-bit resolution
Supply
— 3.0V to 3.6V
SIMPLIFIED BLOCK DIAGRAM
EMC1152
Switching
Current
External Temp
Register
Analog Mux
and Anti-Alias Filter
Configuration
Register
SST One-Wire Interface
ADD
DP
DN
Internal
Temp
Diode
Attenuator bank
12V
5V
3.3V
2.5V
VCCP
11-bit
delta-sigma
ADC
Internal Temp
Register
Digital Mux
and
Byte Interlock
Voltage
Registers
Status Register
SST
SMSC EMC1152
PRODUCT PREVIEW
Revision 2.55 (12-06-06)
SMSC [ SMSC CORPORATION ]
