F81867 Datasheet, PDF (34/315 Pages) Feature Integration Technology Inc. – 6 UARTs μSuper IO With 128 Bytes FIFO and Power Saving Functions

VIN
=
V_+12V
×
R₂
R₁ + R₂
where V_+12V is the analog input voltage, for example.
F81867
If we choose R1=20K, R2=2K, the exact input voltage for V+12v will be 1.09V, which is within
the tolerance. As for application circuit, it can be refer to the figure shown as follows.
3Vcc
(directly connect to the chip)
Voltage Inputs ^{VIN (< 2.04V) (directly connect to the chip)}
150K _VIN3.3
150K
VIN (> 2.04V)
R
1
R2
VREF
8-bit ADC
with
8 mV LSB
R _{10K, 1%}
Typical BJT
Connection
2N3906
D+
D-
RTHM
Typical Thermister
Connection
10K, 25 C
Fig 7-1
PME# interrupt for voltage is shown as figure 7-2. Voltage exceeding or going below high limit
will cause an interrupt if the previous interrupt has been reset by writing “1” all the interrupt Status
Register.
(pulse mode)
*
*
*Interrupt Reset when Interrupt Status Registers are written 1
Voltage PME# Mode
Fig 7-2
Temperature Sensor
The F81867 monitors two remote temperature sensors. These sensors can be measured from -60°C to
127°C for thermal diode & thermistor. More detail please refers to the register description.
Remote-sensor transistor manufacturers
Manufacturer
Model Number
Panasonic
2SB0709 2N3906
Philips
PMBT3906
34
Dec, 2011
V0.12P