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Central processing unit
Large-scale integration
Microprocessor
Read-only memory
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Microprocessor
→
Large-scale integration
depends on
A single-chip CPU requires thousands of MOS transistors to be fabricated and interconnected within a limited chip area, relying on large-scale integration capabilities.
Microprocessor
→
Central processing unit
evolved from
A microprocessor integrates the main functions of a CPU onto a single chip that can be packaged, continuing the process of consolidation from board-level logic to large-scale integration.
Read-only memory
→
Microprocessor
enables
ROM can store the fixed programs needed for startup, table lookup, or control in a microprocessor system, so that the processor does not have to depend on external manual configuration.