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W83781D Datasheet(PDF) 15 Page - Winbond |
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W83781D Datasheet(HTML) 15 Page - Winbond |
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15 / 54 page  W83781D/W83781G Publication Release Date: April 14, 2005 - 11 - Revision 2.0 (f) Temperature 2/3 TOS and THYST write 0 Ack by 781D SCL (Cont...) SDA (Cont...) 78 Frame 3 MSB Data Byte Configuration Register Write 0 Start By Master 100 1 A2 A1 A0 R/W Ack by 781D SCL SDA 78 0 Frame 1 Serial Bus Address Byte 4 D1 D0 Ack by 781D Frame 2 Pointer Byte D6 D5 D4 D3 D2 D1 D7 D0 0 78 D6 D5 D4 D3 D2 D1 D7 D0 Ack by 781D Stop by Master Frame 4 LSB Data Byte 78 0 0 000 0 7.2 Analog Inputs The maximum input voltage of the analog pin is 4.096 because the 8-bit ADC has a 16mv LSB. Really, the application of the PC monitoring would most often be connected to power suppliers. The CPU V-core voltage and 3.3V can directly connected to these analog inputs. The +5V and +12V inputs should be reduced a factor with external resistors so as to obtain the input range. As followed figure is shown. Pin 36 +2.5VINA +2.5VINB Pin 35 +3.3VIN +12VIN Pin 34 Pin 32 Pin 33 VDD(+5V) - + - + -12VIN -12VOUT Pin 31 Pin 30 R2 R1 RF RIN Vs Vs Positive Input Negative Input 8-bit ADC with 16mV LSB Typical Thermister Connection 10K, 1% RTHM VREF Pin 37 VTIN3 VTIN2 VTIN1 Pin 38 Pin 39 Pin 40 -5VIN -5VOUT Pin 29 Pin 28 Positive Inputs The input voltage can be expressed as following equation. |
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