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Embedded Systems
3 articles · Last updated 2026-05-06
Contents
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1
Notes
Overview & Digital I/O
Embedded systems are dedicated, resource-limited devices. Microcontrollers integrate CPU, memory, and I/O on one chip, offering low cost, small size, and easy updates—ideal for most embedded applications.
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Digital Clock
Interrupts trigger ISRs when IF, IE, and GIE bits are set. Timers count internal clock ticks; counters count external events. A 4-digit display uses rapid multiplexing to create persistence of vision.
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Embedded Communications
Serial communication suits microcontrollers due to fewer pins. Asynchronous UART uses baud rate and start/stop bits, while synchronous I2C and SPI rely on a clock line. Distinction: UART uses baud rate, I2C address, SPI slave select.