EMC6D103-CZC SMSC, EMC6D103-CZC Datasheet - Page 56

• Manufacturer Part Number: EMC6D103-CZC
• Description: Industrial Temperature Sensors Auto Fan Contrllr Up to 4 Fans
• Manufacturer: SMSC

Specifications of EMC6D103-CZC

• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Revision 0.3 (03-01-07)
8.2.4
Register
Address
25h
26h
27h
Read/
Write
Registers 25-27h: Temperature Reading
The Temperature Reading registers reflect the current temperatures of the internal and remote diodes.
Remote Diode 1 Temp Reading register reports the temperature measured by the Remote1- and
Remote1+ pins, Remote Diode 2 Temp Reading register reports the temperature measured by the
Remote2- and Remote2+ pins, and the Internal Temp Reading register reports the temperature
measured by the internal (ambient) temperature sensor. Current temperatures are represented as 8
bit, 2’s complement, signed numbers in Celsius, as shown below in
Reading register will return a value of 80h if the remote diode pins are not implemented by the board
designer or are not functioning properly (this corresponds to the diode fault interrupt status bits). The
Temperature Reading registers will be updated automatically by the EMC6D103 Chip with a minimum
frequency of 4Hz.
Note: These registers are read only – a write to these registers has no effect.
Each of the temperature reading registers are mapped to a zone. Each PWM may be programmed to
operate in the auto fan control operating mode by associating a PWM with one or more zones. The
following is a list of the zone associations.
R
R
R
Zone 1 is controlled by Remote Diode 1 Temp Reading
Zone 2 is controlled by Internal Temp Reading (Ambient Temperature Sensor)
Zone 3 is controlled by Remote Diode 2 Temp Reading
Remote Diode 1 Temp Reading
Remote Diode 2 Temp Reading
(SENSOR ERROR)
Internal Temp Reading
TEMPERATURE
Register Name
Table 8.6 Registers 25-27h: Temperature Reading
-127 ° c
127 ° c
-50 ° c
50 ° c
0 ° c
Table 8.7 Temperature vs. Register Reading
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Fan Control Device with High Frequency PWM Support and Hardware Monitoring Features
READING (DEC)
DATASHEET
(MSb)
Bit 7
7
7
7
-127
127
-50
50
0
56
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Bit 6
6
6
6
Bit 5
5
5
5
READING (HEX)
Bit 4
4
4
4
CEh
7Fh
81h
00h
32h
80h
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Bit 3
3
3
3
Table
Bit 2
2
2
2
8.7. The Temperature
Bit 1
1
1
1
SMSC EMC6D103
(LSb)
Bit 0
0
0
0
Datasheet
Default
Value
N/A
N/A
N/A