w83627thg Winbond Electronics Corp America, w83627thg Datasheet - Page 31

• Manufacturer Part Number: w83627thg
• Description: Winbond Lpc I/o
• Manufacturer: Winbond Electronics Corp America

5.3.1
The +12V input voltage can be expressed as following equation.
The value of R1 and R2 can be selected to 28K Ohms and 10K Ohms, respectively, when the input
voltage V1 is 12V. The node voltage of VIN0 can be subject to less than 4.096V for the maximum
input range of the 8-bit ADC.
The -12V input voltage can be expressed as following equation.
The value of R3 and R4 can be selected to 232K Ohms and 56K Ohms, respectively, when the input
voltage V2 is -12V. The node voltage of VIN2 can be subject to less than 4.096V for the maximum
input range of the 8-bit ADC.
The Pin 114 is connected to the power supply VCC with +5V. There are two functions in this pin with
5V. The first function is to supply internal analog power in the W83627THF and the second function is
that this voltage with 5V is connected to internal serial resistors to monitor the +5V voltage. The
W83627THF internal two serial resistors are 34K ohms and 51K ohms so that input voltage to ADC is
3V which is less than 4.096V of ADC maximum input voltage. The express equation can represent as
follows.
The Pin 61 is connected to 5VSB voltage. W83627THF monitors this voltage and the internal two
serial resistors are 34K Ω and 51K Ω so that input voltage to ADC is 3V which less than 4.096V of
ADC maximum input voltage.
5.3.2
W83627THF provides two detection methods for CPUVCORE(pin100).
(1). VRM8 method:
this voltage register multiplies 16mV. The formula is as the following:
(2). VRM9 method: (Default)
formula is as the following:
Monitor over 4.096V voltage:
CPUVCORE voltage detection method:
The LSB of this mode is 16mV. This means that the detected voltage equals to the reading of
The LSB of this mode is 4.88mV which is especially designed for the low voltage CPU. The
Detected Voltage =
Detected Voltage =
VIN
2
Re
Re
=
(
V
V
ading
ading
in
2
−
=
. 3
VCC
where VCC is set to 5V.
VIN
∗
∗
) 6
. 0
. 0
×
016
00488
0
×
R
=
51
3
V
R
- 24 -
+
K
V
1
4
+
×
R
Ω
51
4
. 0
R
+
K
1
+
69
W83627THF/W83627THG
Ω
34
R
+
3
2
, 6 .
K
R
V
2
Ω
whereV
≅
3
V
2
=
−
12