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Component 2: Microcontroller Systems

2 dot points across 2 inquiry questions. Click any dot point for a focused answer with worked past exam questions where available.

How is a microcontroller organised, and how are inputs and outputs connected to its ports?

Microcontroller architecture and interfacing: the structure of a microcontroller (CPU, memory, ports), digital input and output ports, interfacing switches, sensors and output devices, and the on-chip ADC.
A focused answer to WJEC A-Level Electronics microcontroller architecture and interfacing, covering the structure of a microcontroller (CPU, memory and ports), digital input and output ports, interfacing switches, sensors and output devices, and the on-chip analogue-to-digital converter.
12 min answer →

How is a microcontroller program structured, and how do flowcharts represent decisions, loops and subroutines?

Microcontroller programming: flowcharts, sequence, selection and iteration, input and output instructions, time delays, subroutines, and translating a system specification into a program.
A focused answer to WJEC A-Level Electronics microcontroller programming, covering flowcharts, the program structures of sequence, selection and iteration, input and output instructions, time delays, subroutines, and turning a system specification into a working program.
12 min answer →