W83792G Nuvoton Technology Corporation of America, W83792G Datasheet - Page 31
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W83792G
Manufacturer Part Number
W83792G
Description
IC MONITOR H/W 48-LQFP
Manufacturer
Nuvoton Technology Corporation of America
Datasheet
1.W83792AG.pdf
(97 pages)
Specifications of W83792G
Function
Hardware Monitor
Topology
ADC, Fan Control, Register Bank
Sensor Type
External
Sensing Temperature
External Sensor
Output Type
I²C™
Output Alarm
Yes
Output Fan
Yes
Voltage - Supply
4.5 V ~ 5.5 V
Operating Temperature
0°C ~ 70°C
Mounting Type
Surface Mount
Package / Case
48-LQFP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
W83792G
Manufacturer:
Nuvoton Technology Corporation of America
Quantity:
10 000
Company:
Part Number:
W83792GЈ¬ CЈ¬ 1E
Manufacturer:
Winbond
Quantity:
1 000
7.7.4.1. Temperature Measurement Machine
sensor 2/3. 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 bank0 CR[C0/ C8h] and the LSB from the
bank0 CR[C1/C9h] bit 7. The format of the temperature data is show in Table 3.
7.7.4.2. Monitor temperature from thermistor:
temperatures. 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, the thermistor is connected by a serial resistor with 10K
Ohms(1% error), then connect to VREF (Pin 37).
7.7.4.3. Monitor temperature from Pentium IVTM thermal diode or bipolar transistor 2N3904
The W83792D/G can alternate the thermistor to Pentium IV
2N3904 and the circuit connection is shown as Figure 11. The pin of Pentium IV
power supply ground (GND) and the pin D+ is connected to pin VTINx in the W83792D/G. 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.
+125°C
+25°C
+1°C
+0.5°C
+0°C
TEMPERATURE
The temperature data format is 8-bit two-complement for sensor 1 and 9-bit two-complement for
The W83792D/G can be connected three thermistors to measure three different environmental
P entium IV
T em perature S en sor
T herm inal
B ipolar T ransistor
C P U
B
D iode
O R
8-BIT BINARY
C
E
0111,1101
0001,1001
0000,0001
0000,0000
2N 3904
8-BIT DIGITAL OUTPUT
-
D +
D -
F igure 9.
R =15 K , 1%
8-BIT HEX
Table 3.
- 25 -
R =1 5K , 1%
7Dh
19h
01h
00h
-
C = 3300p F
C =33 00pF
V R E F
P IV T D x
P IV T D x
TM
W 83792D
9-BIT BINARY
Publication Release Date: April 26, 2006
thermal diode interface or transistor
0,1111,1010
0,0011,0010
0,0000,0010
0,0000,0001
0,0000,0000
W83792AD/AG/D/G
9-BIT DIGITAL OUTPUT
TM
D- is connected to
9-BIT HEX
0FAh
032h
002h
001h
000h
Revision 0.9