W83627EHG Nuvoton Technology Corporation of America, W83627EHG Datasheet - Page 50

• Manufacturer Part Number: W83627EHG
• Description: IC I/O CONTROLLER 128-QFP
• Manufacturer: Nuvoton Technology Corporation of America

Specifications of W83627EHG

• Applications: PC's, PDA's
• Interface: LPC
• Voltage - Supply: 3.3V
• Package / Case: 128-XFQFN
• Mounting Type: Surface Mount
• Pin Count: 128
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

7.3.3.1.
The W83627EHF/EHG can connect three thermistors to measure three different environment
temperature. The specification of thermistor should be considered to (1) β value is 3435K, (2) resistor
value is 10K ohms at 25°C. In the Figure 7.2, the themistor is connected by a serial resistor with 10K
Ohms, then connect to VREF (pin 101).
7.3.3.2.
The W83627EHF/EHG can alternate the thermistor to Pentium II
circuit connection is shown as Figure 7.3. 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
Monitor temperature from thermistor
Monitor temperature from Pentium II
Pentium II/III/IV
CPU
Therminal
8-BIT BINARY
Diode
-
1111,1111
1110,0111
1100,1001
8-BIT DIGITAL OUTPUT
D+
D-
R=15K,1%
TM
Figure 7.3
W83627EHF/EF, W83627EHG/EG
8-BIT HEX
AGND
/Pentium III
C=2200pF
-
FFh
E7h
C9h
Table 7.1
-39-
TM
thermal diode
9-BIT BINARY
TM
1,1111,1111
1,1111,1110
1,1100,1110
1,1001,0010
VREF
CPUTIN
AGND
TM
Publication Release Date: April 7, 2009
/Pentium III
9-BIT DIGITAL OUTPUT
W83627EHF
/ Pentium III
TM
TM
thermal diode and the
9-BIT HEX
D- is connected to
1FFh
1FFh
1CEh
192h
Version 1.94