six-instructions-micro

Six instructions microprocessor written in VHDL based on VAHID example (chapter 8)

It has four main parts, divided in subparts:

1. Data memory (MD.vhd)
2. Instruction memory (MI.vhd)
3. Datapath (BO.vhd)
   • Multiplexer 3x1 (MUX.vhd)
   • Register files (BANCOREG.vhd)
   • ALU (ULA16bits.vhd)
4. Control unit
   • PC (PC.vhd)
   • IR (IR.vhd)
   • Controller (basically the FSM) (BC.vhd) (FSM1.vhd)

This project was implemented in Quartus II. So one might open the project file 'MICRO.qpf' and the components would be the .vhd files.

The file MICROcdivisor.vhd uses an external clock with 1 second of period that was used basically to observe the operation in the lab.

BCBO.vhd is the connection between the datapath and the control unit.

On MI.vhd (instruction memory), we have a simple algorithm to be performed by the microprocessor. The data memory has an array of integers and we want to know how many elements are equal to 3.

RTL Views

• LEDs were used to visualize results and operation in the lab.

Top view

Connections between control and datapath

Data memory

Instruction memory