Which operational unit in the STC89C52's ALU executes the MUL AB instruction?

Question

Accepted Answer

The Integer Arithmetic OPU, which contains dedicated hardware for the shift-and-add multiplication algorithm

Answer

The Decimal Arithmetic OPU, which uses BCD representation for all operations

Answer

The Floating-Point OPU, which converts integers to floating-point for multiplication

Answer

The Logical Operations OPU, which handles all bit manipulations including multiplication

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