Animated Guide to Common Embedded Communication Protocols: SPI, I²C, UART, Infrared

These animated diagrams of signal waveforms in electronic systems help us understand the mechanics of transmission.

1

SPI Transmission

▲ Figure 1 SPI Data Transmission

▲ Figure 1.2 SPI Data Transmission (2)

▲ Figure 1.3 SPI Timing Signal

2

I²C Transmission

▲ Figure 1.2.1 I2C Bus and Addressing Method

3

UART Transmission

▲ Figure 1.3.1 Debugging MCU via UART on PC

▲ Figure 1.3.2 RS-232 Communication with MCU via Level Conversion Chip

4

Infrared Control

▲ Figure 1.4.1 Infrared Control Signal is also a Serial Communication Signal

▲ Figure 1.4.2 Infrared Signal Reception and Amplification Shaping Circuit

▲ Figure 1.4.3 A Circuit for Feeding Fish Using Infrared Reception to Control a Relay

5

Serial to Parallel Conversion Circuit

▲ Figure 1.5.1 Serial Input, Parallel Output Shift Register

▲ Figure 1.5.2 Shift Register Composed of Eight D Registers

▲ Figure 1.5.4 Serial Transmission Schematic

6

Other Waveform Animations

▲ Figure 1.6.1 PWM Control of LED Brightness

▲ Figure 1.6.2 PWM Control of LED Brightness

▲ Figure 1.6.3 Amplitude and Frequency Modulated Signals

▲ Figure 1.6.4 Phase Modulated Signal

▲ Figure 1.6.5 Square Wave Edge Jitter Waveform

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