Table of Contents 1. Interface Types and Signal Definitions 2. Logic Levels 3. Communication Rates 4. Serial Communication Topology 5. Application Circuits ✍ Welcome to click here to join the hardware electronics group of San Pao Er. Hello everyone, I’m San Pao Er; today’s notes are about the RS-232 protocol/interface. The RS-232 serial data communication … Read more
Differences Between TTL and RS232 Levels What are TTL levels, CMOS levels, and RS232 levels? What are their differences? Generally speaking, CMOS levels have a higher noise tolerance than TTL levels. (1) TTL Level Standards Output L: <0.8V; H: >2.4V. Input L: <1.2V; H: >2.0V The output low level of TTL devices must be less … Read more
The Concept of Levels: What are voltage, current, and power? Radio enthusiasts are well aware of these. However, when it comes to the term “level”, few can explain it clearly. Although people frequently encounter high levels, low levels, level gain, and level attenuation in circuits, and even multimeters essential for electricians have methods for measuring … Read more