TinyMicro control unit

Design the control unit of the TinyMicro.

Specification

module control_unit (Instruction, Instruction_Address, EnA, EnB, Op,
                     ReadWrite, MemConst, MemALU, Zero, Positive, Const,
                     clk, rst);
    input [7:0] Instruction;
    output [5:0] Instruction_Address;
    output [1:0] Op;
    output [7:0] Const;
    output EnA, EnB, ReadWrite, MemConst, MemALU;
    input Zero, Positive;
    input clk, rst;

Input

Instruction is the instruction coming from the instruction memory.
Zero is the signal that is asserted when the zero condition for a jump is true.
Positive is the signal that is asserted when the positive condition for a jump is true.
clk is the clock signal of the circuit.
rst is the reset signal of the circuit.

Output

Instruction_Address is the address sent to the instruction memory (program counter).
Op indicates the type of operation for ALU instructions.
Const is the constant encoded in instruction register (sign-extended up to 8 bits).
EnA and EnB are the signals that enable writing into registers RA ad RB, respectively.
ReadWrite is the signal the indicates whether to read (0) from or write (1) into data memory.
MemConst is the signal that controls the datapath multiplexer selecting between data memory (0) and constant from the instruction register (1).
MemALU is the signal that controls the datapath multiplexer selecting between memory/constant (0) and the ALU output (1).

Problem information

Author: Jordi Cortadella

Generation: 2026-02-03T12:25:15.001Z