QFP128

Method to Measure If the Crystal Oscillator is Oscillating Using an Oscilloscope

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Method to Measure If the Crystal Oscillator is Oscillating Using an Oscilloscope

During this circuit board test, I found that one circuit board could never be programmed. So I checked: 1. There are no issues with the power supply and ground. 2. Using the oscilloscope to measure whether the crystal oscillator is oscillating, I found a strange issue: a 24MHz sine wave appeared at the XOUT pin, … Read more

Common Packages for Programming Chips

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Common Packages for Programming Chips

First, we need to understand what packaging is, which refers to the casing installed on semiconductor integrated circuit chips. It serves to place, fix, seal, protect the chip, and enhance thermal performance, while also acting as a bridge between the internal world of the chip and the external circuit, allowing for different appearances based on … Read more