EMC6D100-DK SMSC [SMSC Corporation], EMC6D100-DK Datasheet - Page 28
EMC6D100-DK
Manufacturer Part Number
EMC6D100-DK
Description
ENVIRONMENTAL MONITORING AND CONTROL DEVICE WITH AUTOMATIC FAN CAPABILITY
Manufacturer
SMSC [SMSC Corporation]
Datasheet
1.EMC6D100-DK.pdf
(75 pages)
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6.9.4
6.9.5
6.10
SMSC EMC6D100/EMC6D101
OFFSET REGISTER
Offset Register 1 is used for internal (Zone 2) or Processor (Zone 1) temperature reading.
Register 1 (1Fh) contain a 2's complement value which is added (or subtracted if the number is negative)
to the temperature reading. The default value in the offset register is zero, so initially zero is always added
to the temperature reading. This offset register is configured for the external temperature channel by
default. It may be switched to the internal channel by setting bit 4 of the Special Function Register to 1.
SECOND OFFSET REGISTER
The Offset Register 2 at 1Eh is for remote (Zone 3) temperature reading. This register contains a 2's
complement value which is added (or subtracted if the number is negative) to the second external
temperature reading. Note that the default value in the offset register is zero, so initially zero is always
added to the second temperature reading. This offset register only applies to remote (Zone 3) diode
temperature reading. No configuration bit is required.
Temperature Smoothing
The part implements temperature “spike” smoothing to prevent the fan from spinning up rapidly as a result
of a spike in temperature. The spike smoothing registers allow the smoothing interval to be selected for
each zone. See the description of registers 62h and 63h.
SENSOR ERROR
TEMPERATURE
+127
0
C
READING (DEC)
DATASHEET
127
128
Page 28
READING (HEX)
7Fh
80h
DIGITAL OUTPUT
Environmental Monitoring and Control Device
0111 1111
1000 0000
Rev. 09-09-04
The Offset
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