1, electronic control unit:
Ecu is mainly used in automobile field, also known as "driving computer" and "vehicle computer".
2, single chip microcomputer:
Compared with ECU, Mcu is more widely used, such as mobile phones, PC peripherals, remote controllers, automotive electronics, industrial stepping motors, mechanical arm control and so on. It can be seen.
Second, the functional structure is different:
1, electronic control unit:
Like an ordinary computer, it consists of a microcontroller (MCU), a memory (ROM, RAM), an input/output interface (I/O), an analog-to-digital converter (A/D) and a large-scale integrated circuit such as shaping and driving.
2, single chip microcomputer:
Mcu is a chip-level computer, which appropriately reduces the frequency and specifications of the central processing unit, and integrates peripheral interfaces such as memory, timer, USB, A/D conversion, UART, PLC, DMA, and even LCD driver circuits on a single chip.
Third, the contact between Ecu and Mcu:
ECU is generally composed of MCU, extended memory, extended IO port, CAN/LIN bus transceiver controller and other devices.
special technology
In ECU, CPU is the core component, which has the functions of calculation and control. When the engine is running, the signals of various sensors are collected and calculated, and the calculation results are converted into control signals to control the work of the controlled object. It also controls memory (ROM/FLASH/EEPROM, RAM), input/output interface (I/O) and other external circuits.
The program stored in ROM is written on the basis of accurate calculation and a large number of experimental data. This inherent program is constantly compared and calculated with the signals collected from various sensors when the engine is working. The comparison and calculation results are used to control the ignition, air-fuel ratio, idle speed, exhaust gas recirculation and other parameters of the engine.
Reference to the above content: Baidu Encyclopedia -ECU
Refer to the above content: Baidu Encyclopedia-Single Chip Microcomputer