Can the CPU directly access data stored in memory?

Can the cpu directly access the data stored in the memory?

CPU can directly access data stored in memory, but cannot directly access data stored in external memory.

The CPU can only access memory data, and external storage data must be read into the memory before being accessed by the CPU.

Memory data refers to: data in the memory stick and CPU cache. Memory data is temporary data and cannot be retained for a long time.

External storage data refers to: data in hard disks and optical disks. External storage data can be retained for a long time.

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