W83627EHF Datasheet, PDF (34/141 Pages) Winbond – evolving product from Winbonds most popular I/O family

W83627EHF/EF, W83627EHG/EG
Continued.
TEMPERATURE
-0.5°C
-1°C
-25°C
-55°C
8-BIT DIGITAL OUTPUT
8-BIT BINARY
8-BIT HEX
-
-
1111,1111
FFh
1110,0111
E7h
1100,1001
C9h
Table 6.1
9-BIT DIGITAL OUTPUT
9-BIT BINARY
9-BIT HEX
1,1111,1111
1FFh
1,1111,1110
1FFh
1,1100,1110
1CEh
1,1001,0010
192h
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) β value is 3435K, (2) resistor
value is 10K ohms at 25°C. 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^TM/Pentium III^TM thermal diode and
the circuit connection is shown as Figure 6.3. The pin of Pentium II^TM/ Pentium III^TM D- is connected to
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.
R=15K,1%
Pentium II/III/IV
CPU
D+
Therminal
Diode
D-
C=2200pF
AGND
Figure 6.3
VREF
W83627EHF
CPUTIN
AGND
-28-