w83627ehf Winbond Electronics Corp America, w83627ehf Datasheet - Page 34

• Manufacturer Part Number: w83627ehf
• Description: W83627ehf/ef W83627ehg/eg Winbond Lpc I/o
• Manufacturer: Winbond Electronics Corp America

Continued.
6.3.3.1. Monitor temperature from thermistor
The W83627EHF/EHG can connect three thermistors to measure three different environment
temperature. The specification of thermistor should be considered to (1) E value is 3435K, (2) resistor
value is 10K ohms at 25qC. In the Figure 6.2, the themistor is connected by a serial resistor with 10K
Ohms, then connect to VREF (pin 101).
6.3.3.2. Monitor temperature from Pentium IITM/Pentium IIITM thermal diode
The W83627EHF/EHG can alternate the thermistor to Pentium II
the circuit connection is shown as Figure 6.3. The pin of Pentium II
AGND(pin 117) and the pin D+ is connected to temperature sensor pin in the W83627EHF/EHG. The
resistor R=15K ohms should be connected to VREF to supply the diode bias current and the bypass
capacitor C=2200pF should be added to filter the high frequency noise.
TEMPERATURE
-0.5°C
-1°C
-25°C
-55°C
8-BIT BINARY
-
1111,1111
1110,0111
1100,1001
8-BIT DIGITAL OUTPUT
W83627EHF/EF, W83627EHG/EG
ÔÚá×
Figure 6.3
8-BIT HEX
-
FFh
E7h
C9h
-28-
Table 6.1
9-BIT BINARY
1,1111,1111
1,1111,1110
1,1100,1110
1,1001,0010
TM
TM
/Pentium III
/ Pentium III
9-BIT DIGITAL OUTPUT
W83627EHF
TM
TM
thermal diode and
D- is connected to
1FFh
1FFh
1CEh
192h
9-BIT HEX