MC9S08AC48MFDE Freescale Semiconductor, MC9S08AC48MFDE Datasheet - Page 137
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MC9S08AC48MFDE
Manufacturer Part Number
MC9S08AC48MFDE
Description
MCU 8BIT 48K FLASH 48-QFN
Manufacturer
Freescale Semiconductor
Series
HCS08r
Datasheet
1.MC9S08AC60CFJE.pdf
(348 pages)
Specifications of MC9S08AC48MFDE
Core Processor
HCS08
Core Size
8-Bit
Speed
40MHz
Connectivity
I²C, SCI, SPI
Peripherals
LVD, POR, PWM, WDT
Number Of I /o
38
Program Memory Size
48KB (48K x 8)
Program Memory Type
FLASH
Ram Size
2K x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 5.5 V
Data Converters
A/D 8x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 125°C
Package / Case
48-QFN Exposed Pad
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
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9.2.3
The ADC module includes a temperature sensor whose output is connected to one of the ADC analog
channel inputs.
where:
For temperature calculations, use the V
In application code, the user reads the temperature sensor channel, calculates V
V
less than V
To improve accuracy , calibrate the bandgap voltage reference and temperature sensor.
Calibrating at 25 °C will improve accuracy to 4.5 °C.
Calibration at 3 points, -40 °C, 25 °C, and 125 °C will improve accuracy to 2.5 °C. Once calibration has
been completed, the user will need to calculate the slope for both hot and cold. In application code, the
user would then calculate the temperature using
temperature is above or below 25 °C. Once determined if the temperature is above or below 25 °C, the user
can recalculate the temperature using the hot or cold slope value obtained during calibration.
For more information on using the temperature sensor, consult AN3031.
Freescale Semiconductor
TEMP25
— V
— V
— m is the hot or cold voltage versus temperature slope in V/°C.
. If V
TEMP25
Temperature Sensor
TEMP
TEMP25
TEMP
Equation 9-1
is the voltage of the temperature sensor channel at the ambient temperature.
the hot slope value is applied in
is greater than V
is the voltage of the temperature sensor channel at 25°C.
provides an approximate transfer function of the temperature sensor.
Temp = 25 - ((V
MC9S08AC60 Series Data Sheet, Rev. 2
TEMP25
TEMP25
the cold slope value is applied in
TEMP
and m values from the ADC Electricals table.
Equation 9-1
-V
Equation
TEMP25
) ÷ m)
9-1.
as detailed above and then determine if the
Chapter 9 Analog-to-Digital Converter (S08ADC10V1)
Equation
TEMP
, and compares to
9-1. If V
Eqn. 9-1
TEMP
137
is
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