EMC1053 Standard Microsystems Corp., EMC1053 Datasheet - Page 11

• Manufacturer Part Number: EMC1053
• Description: 1 Degree C Triple Temperature Sensor With Resistance Error Correction & Hotter Of Two Zones
• Manufacturer: Standard Microsystems Corp.

1°C Triple Temperature Sensor with Resistance Error Correction & Hotter of Two Zones
Datasheet
Chapter 3 Product Description
SMSC EMC1053
3.1
3.2
3.3
The EMC1053 is an SMBus sensor that monitors three temperature zones for use in a personal
computer or embedded environment. The part may be used as a companion to one of SMSC’s broad
line of SIO host devices to perform fan control and thermal management.
A typical system drawing of the EMC1053 is shown in
The EMC1053 has two power modes.
The EMC1053 supports a One-Shot command when it is in Standby Mode. Writing to the One-Shot
register will cause the device to power up, perform 1 full set of temperature conversions, then return
to Standby Mode.
When the device is active, there are two modes of operation available.
Power Modes
One Shot During Standby Mode
Operation During Run Mode
Run Mode - In this mode, the temperature monitors are active and converting at the programmed
conversion rate. The average power dissipation will depend on the conversion rate. When the
EMC1053 is not actively converting a channel, it goes into a lower power wait state.
Standby Mode (power-up default) - in this mode, the EMC1053 is put into a low power state. In the
standby mode, temperature monitoring is disabled. The device will still respond to SMBus
commands.
Normal Mode (power-up default) - In this mode of operation, the EMC1053 continuously samples
and updates all of its temperature channels.
Hotter of Two Mode - In this mode, the EMC1053 continuously samples and then compares the
two remote zones. The hotter of the two remote zones is loaded into the External Diode 2 Data
Registers. In addition, the HOTTER bit in the Status register is set or cleared to indicate which
external diode zone is hotter. If the two remote zones are exactly equal to each other, then the
HOTTER bit is cleared (set to ‘0’), and the results of the two remote zones are stored in their
respective registers.
DP1
DN1
DP2
DN2
EMC105
Interna
Diod
3
e
l
Figure 3.1 EMC1053 Diode System
DATASHEET
SMBu
s
11
Interface
SMBu
s
Hos
Figure
t
3.1.
Revision 1.44 (04-14-08)