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About Microcontrollers (MCU)
Microcontrollers (MCU) are complete computer systems on a chip. They combine an arithmetic logic unit (ALU), memory, timer/counters, serial port, input/output (I/O) ports and a clock oscillator. Most microcontrollers include a 4-bit, 8-bit, 16-bit, 32-bit, 64-bit, or 128-bit data bus. The number of serial channels and I/O ports varies among devices. Serial interfaces include controller area network (CAN), inter-integrated circuit (I2C), serial peripheral interface (SPI), serial communications interface (SCI), universal serial bus (USB), universal asynchronous receiver transmitter (UART), and universal synchronous/asynchronous receiver transmitter (USART). Common features include watchdog timers, direct memory access (DMA) channels, pulse width modulation (PWM) channels, power saving modes, oscillator safeguards (OSG), low frequency auxiliary oscillators (LFAO), low voltage detectors (LVD), readout protection, and liquid crystal display (LCD) drivers. Converters with an 8-bit, 16-bit, 24-bit, or 32-bit resolution are commonly available. Some microcontrollers include analog-to-digital converters (ADC). Others provide digital-to-analog converters (DAC).
Engineering Web: Microcontrollers MCU - Machine Design
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Keeping cool | Machine Design Low-cost microcontrollers (MCU) broke the price barrier to create economical variable-speed dc fans. |
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Bigger Role for 16-bit Chips | Machine Design Jim Sibigtroth, Applications Manager Jim Williams, 16-Bit Applications Section Leader Motorola Inc. Austin, Texas www.motorola.com by Sherri Koucky |
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Appliances get connected | Machine Design Hybrid MCU/DSP chips bring connectivity to household appliances. www.motorola.com Edited by Kathleen Franzinger |
