What is An internal short term memory in a microprocessor is called?

An internal short-term memory in a microprocessor is called cache memory. Cache memory is used to store frequently accessed data and instructions, allowing for faster retrieval and processing compared to accessing data from the main memory (RAM). It is typically divided into levels, such as L1, L2, and sometimes L3, with L1 being the fastest and closest to the CPU cores. Cache memory significantly enhances the overall performance of the microprocessor by reducing latency.