English
Language : 

W83627HF Datasheet, PDF (113/185 Pages) Winbond – WINBOND I/O
◁
W83627HF/F
PRELIMINARY
11.3.3 Temperature Measurement Machine
The temperature data format is 8-bit two's-complement for sensor 2 and 9-bit two's-complement for
sensor 1. 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 CR[50h] and the LSB from the Bank1
CR[51h] bit 7. The format of the temperature data is show in Table 1.
Temperature
+125°C
+25°C
+1°C
+0.5°C
+0°C
-0.5°C
-1°C
-25°C
-55°C
8-Bit Digital Output
8-Bit Binary
8-Bit Hex
0111,1101
7Dh
0001,1001
19h
0000,0001
01h
-
-
0000,0000
00h
-
-
1111,1111
FFh
1110,0111
E7h
1100,1001
C9h
Table 2.
9-Bit Digital Output
9-Bit Binary
9-Bit Hex
0,1111,1010
0FAh
0,0011,0010
032h
0,0000,0010
002h
0,0000,0001
001h
0,0000,0000
000h
1,1111,1111
1FFh
1,1111,1110
1FFh
1,1100,1110
1CEh
1,1001,0010
192h
11.3.3.1
Monitor temperature from thermistor:
The W83627HF can connect three thermistors to measure three different envirment 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 11.2, the themistor is connected by a serial resistor with 10K Ohms, then
connect to VREF (Pin 101).
11.3.3.2
2N3904
Monitor temperature from Pentium IITM thermal diode or bipolar transistor
The W83627HF can alternate the thermistor to Pentium IITM (Deschutes) thermal diode interface or
transistor 2N3904 and the circuit connection is shown as Figure 11.3. The pin of Pentium IITM D- is
connected to power supply ground (GND) and the pin D+ is connected to pin VTINx in the
W83627HF. 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 togeter to act as a thermal diode.
- 96 -
Publication Release Date: Jul 1999
Revision 0.53
 ▷