w83627thg Winbond Electronics Corp America, w83627thg Datasheet - Page 32

• Manufacturer Part Number: w83627thg
• Description: Winbond Lpc I/o
• Manufacturer: Winbond Electronics Corp America

5.3.3
The temperature data format is 8-bit two's-complement for sensor SYSTIN and 9-bit two's-
complement for sensor CPUTIN and AUXTIN. The 8-bit temperature data can be obtained by reading
the CR[27h]. The 9-bit temperature data can be obtained by reading the 8 MSBs from the
Bank1/Bank2 CR[50h] and the LSB from the Bank1/Bank2 CR[51h] bit 7.
temperature data is show in Table 5-1.
5.3.3.1
The W83627THF 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 5-2, the themistor is connected by a serial resistor with 10K Ohms, then
connect to VREF (Pin 101).
5.3.3.2
transistor 2N3904
The W83627THF can alternate the thermistor to Pentium II
transistor 2N3904 and the circuit connection is shown as Figure 5-3. The pin of Pentium II
III
W83627THF. The resistor R=30K ohms should be connected to VREF to supply the diode bias current
and the bypass capacitor C=3300pF should be added to filter the high frequency noise. The transistor
2N3904 should be connected to a form with a diode, that is, the Base (B) and Collector (C) in the
2N3904 should be tied together to act as a thermal diode.
TM
TEMPERATURE
D- is connected to AGND and the pin D+ is connected to temperature sensor pin in the
Temperature Measurement Machine
+125°C
Monitor temperature from thermistor:
Monitor temperature from Pentium IITM/Pentium IIITM thermal diode or bipolar
+0.5°C
+25°C
-0.5°C
-25°C
-55°C
+1°C
+0°C
-1°C
8-Bit Binary
0111,1101
0001,1001
0000,0001
0000,0000
1111,1111
1110,0111
1100,1001
8-BIT DIGITAL OUTPUT
-
-
Table 5-1
8-Bit Hex
- 25 -
7Dh
FFh
E7h
C9h
19h
01h
00h
-
-
W83627THF/W83627THG
TM
Publication Release Date: September 26, 2006
/Pentium III
0,1111,1010
0,0011,0010
0,0000,0010
0,0000,0001
0,0000,0000
1,1111,1111
1,1111,1110
1,1100,1110
1,1001,0010
9-Bit Binary
9-BIT DIGITAL OUTPUT
TM
thermal diode interface or
The format of the
9-Bit Hex
TM
1CEh
0FAh
Revision 1.2
1FFh
1FFh
032h
002h
001h
000h
192h
/Pentium