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W83627DHG
Publication Release Date: Aug, 22, 2007
-33- Version
1.4
Eight-bit temperature data is read from Index[27h]. For nine-bit temperature data, the 8 MSB are read
from Bank1 / Bank2 Index[50h], and the LSB is read from Bank1 / Bank2 Index[51h], bit 7.
There are two sources of temperature data: external thermistors or thermal diodes.
7.3.3.1.
Monitor Temperature From Thermistor
External thermistors should have a
β
value of 3435K and a resistance of 10 K
Ω
at 25
°
C. As illustrated
in the schematic below, the thermistor is connected in series with a 10-K
Ω
resistor and then connects
to VREF (pin 101).
10K, 1%
R
THM
VREF
Pin 101
AUXTIN
CPUTIN
SYSTIN
Pin 102
Pin 103
Pin 104
10K@25 C, beta=3435K
R
W83627DHG
7.3.3.2.
Monitor Temperature from Thermal Diode (Voltage Mode)
The thermal diode D- pin is connected to CPUD-(pin 105), and the D+ pin is connected to the
temperature sensor pin in the W83627DHG. A 15-K
Ω
resistor is connected to VREF to supply the bias
current for the diode, and the 2200-pF, bypass capacitor is added to filter high-frequency noise.
D+
D-
Therminal
Diode
C=2200pF
R=15K,1%
VREF
CPUTIN
W83627DHG
CPUD-(AGND)
AGND
(SYSTIN)
(AUXTIN)
Содержание W83627DHG
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