SD chip role: SD memory particle is the most core component of memory, memory storage medium can be directly related to the performance of memory. Mainly for storage. We often say that the computer is the calculation of 0 and 1, and the capacitors and transistors on the inside of the memory chip act as such operations.
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When the capacitor is full of electrons, it represents a 1 or a 0, and the transistor represents a switch that allows the control circuit to read or change the state of the capacitor.
A capacitor and a transistor form a pair called a storage unit, which requires periodic replenishment of electrons to maintain the state and is called a \"dynamic\" memory.