ELECTRONIC CONTROL UNIT(COMPUTER)

University of Technical Education
Ho Chi Minh City

ELECTRONIC CONTROL UNIT
(COMPUTER)
Le Thanh Phuc
Faculty of Automotive Engineering
Email:
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Introduction
A computer is an electronic device that
stores and processes data.
It is also capable of controlling other devices.

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Introduction
The computer contains a crystal oscillator or
clock circuit that delivers a constant time
pulse.

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Signal Conditioning and Conversion
Some input sensors produce a very lowvoltage signal of less than 1 volt.
This signal also has an extremely lowcurrent flow.
Therefore, this type of signal must be

amplified, or increased, before it is sent to
the microprocessor.

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Signal Conditioning and Conversion

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Signal Conditioning and Conversion
The digital computer cannot accept analog
signals from the sensors and requires an
input interface to convert the analog signal to
digital.
The analog to digital (A/D) converter
continually scans the analog input signals at
regular intervals.
For example, if the A/D converter scans the
TPS signal and finds the signal at 5 volts, the
A/D converter assigns a numeric value to this
specific voltage.
Then the A/D converter changes this
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numeric value to a binary code


Signal Conditioning and Conversion

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Microprocessor
The microprocessor (μP) is the brain of
the computer.
The μP brings information into and out of
the computer’s memory.
The registers used include the
accumulator, the data counter, the program
counter, and the instruction register.
The control unit implements the
instructions located in the instruction
register.
The arithmetic logic unit (ALU) performs
the arithmetic and logic functions.

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Microprocessor

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