w83l786r Winbond Electronics Corp America, w83l786r Datasheet - Page 18

• Manufacturer Part Number: w83l786r
• Description: H/w Monitoring Ic
• Manufacturer: Winbond Electronics Corp America

7.5
The temperature data format is 8-bit unsigned for thermal sensor. The 8-bit temperature data can be
obtained by reading the VR [25h], VR [26h] or VR [27h]. The format of the temperature data is shown
in Table 1.
7.5.1
W83L786R/G can connect two thermistors and one thermal diode sensor to measure three different
environment temperatures. The specification of thermistor should be considered to (1) β value is 3435
K, and (2) resistor value is 10K ohms at 25°C. In the Figure 3, the themistor is connected by a serial
resistor with 10K Ohms, and then connect to V
7.5.2
W83L786R/G can alternate the thermistor to thermal diode interface and the circuit connection is
shown as Figure 5. The pin of D- is connected to power supply ground (GND) and the pin D+ is
connected to pin D+ or VTIN1 in the W83L786R/G. The bypass capacitor C=2200pF should be added
to filter the high frequency noise.
TEMPERATURE
Temperature Measurement Machine
Monitor Temperature from Thermistor
Monitor Temperature from Thermal Diode
+160°C
T e m p e r a t u r e s e n s o r
+25°C
B i p o l a r T r a n s i s t o r
+2°C
+1°C
+0°C
C P U
T h e r m i n a l
D i o d e
2 N 3 9 0 4
o r G P U
8-BIT BINARY
D +
D -
1010,0000
0001,1001
0000,0010
0000,0001
0000,0000
REF
Figure 5
Table 1
(pin 19).
- 12 -
8-BIT DIGITAL OUTPUT
C = 2 2 0 0 p F
C = 2 2 0 0 p F
W83L786R/ W83L786G
Publication Release Date: March 06
8-BIT HEX
V T I N 1
D +
D -
W 8 3 L 7 8 6 R
A0h
19h
02h
01h
00h
Revision0.8