W83627EHF Datasheet, PDF (33/141 Pages) Winbond – evolving product from Winbonds most popular I/O family

W83627EHF/EF, W83627EHG/EG
The -12V input voltage can be expressed as following equation.
VIN1 = (V 1 − 2.048) × ^R4 + 2.048, whereV 1 = −12
R3 + R4
The value of R3 and R4 can be selected to 232K Ohms and 10K Ohms, respectively, when the input
voltage V₁ is -12V. The node voltage of VIN1 can be subject to less than 2.048V for the maximum
input range of the 8-bit ADC.
Both of pin 12 and pin 114 are connected to the power supply VCC with +3.3V. There are two
functions in these 2 pins with 3.3V. The first function is to supply internal (digital/analog) power in the
W83627EHF/EHG and the second function is that this voltage with 3.3V is connected to internal serial
resistors to monitor the +3.3V voltage. The W83627EHF/EHG internal two serial resistors are 34 KΩ
and 34 KΩ so that input voltage to ADC is 1.65V which is less than 2.048V of ADC maximum input
voltage. The express equation can represent as follows.
V_in
= VCC ×
34KΩ
34KΩ + 34KΩ
≅ 1.65V
,
where
VCC
is
set
to
3.3V.
The Pin 61 is connected to 3.3 VSB voltage. W83627EHF/EHG monitors this voltage and the internal
two serial resistors are 34 KΩ and 34 KΩ so that input voltage to ADC is 1.65V which less than
2.048V of ADC maximum input voltage.
6.3.2 CPUVCORE voltage detection method
W83627EHF/EHG provides one detection methods for CPUVCORE(pin 100).
The LSB of this mode is 8mV. This means that the detected voltage equals to the reading of this
voltage register multiplies 8mV. The formula is as the following:
Detected Voltage = Reading ∗ 0.008 V
6.3.3 Temperature Measurement Machine
The temperature data format is 8-bit two's-complement for sensor SYSTIN and 9-bit two's-
complement for sensor CPUTIN and AUXTIN. 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
Bank1/Bank2 CR[50h] and the LSB from the Bank1/Bank2 CR[51h] bit 7. The format of the
temperature data is show in Table 6.1.
TEMPERATURE
+125°C
+25°C
+1°C
+0.5°C
+0°C
8-BIT DIGITAL OUTPUT
8-BIT BINARY
8-BIT HEX
0111,1101
7Dh
0001,1001
19h
0000,0001
01h
-
-
0000,0000
00h
9-BIT DIGITAL OUTPUT
9-BIT BINARY
9-BIT HEX
0,1111,1010
0FAh
0,0011,0010
032h
0,0000,0010
002h
0,0000,0001
001h
0,0000,0000
000h
Publication Release Date: January 18, 2006
-27-
Revision 1.0