Datapath
\documentclass[border=3pt]{standalone}
%%Fonts
%\usepackage{fontspec}
%\setmainfont[Mapping=tex-text]{Times New Roman}
%\setmonofont[Mapping=tex-text]{JetBrains Mono}
%Drawing
\usepackage{tikz}
%Tikz Library
\usetikzlibrary{calc}
% Align text in the center of nodes
\tikzset{every text node part/.style={align=center}}
% Circuits
\usepackage{circuitikz}
% Colors
\usepackage{xcolor}
%
\definecolor{myblue}{HTML}{4698ED}
%
\def\muxcolor{orange!40}
\def\nonarchcolor{yellow!40}
\def\processingcolor{green!70!blue!30!}
\def\storagecolor{myblue!50}
\def\controlcolor{cyan!80!blue}
% Label
\tikzset{label_args/.style={
font=\scriptsize\ttfamily,
}
}
% FF size
\def\ffsize{2.2}
\def\ffwidth{1.3}
% CLK above components
\tikzset{clk/.pic = {
\node[above] at (#1) {\scriptsize{CLK}};
}
}
% Non-Architectural Flip Flop
\tikzset{non_arch_ff/.style={
muxdemux,
muxdemux def={
Lh=\ffsize, Rh=\ffsize, w=\ffwidth, square pins=1,
inset Lh=0, inset Rh=0, inset w=0,
NL=1, NR=1, NB=0, NT=1,
},
muxdemux label ={
cT1=1,
},
circuitikz/muxdemuxes/fill=\nonarchcolor,
append after command={
pic{clk=\tikzlastnode.tpin 1}
},
},
}
% Non-Architectural Flip Flop with We
\tikzset{non_arch_ff_we/.style={
muxdemux,
muxdemux def={
Lh=\ffsize, Rh=\ffsize, w=\ffwidth, square pins=1,
inset Lh=0, inset Rh=0, inset w=0,
NL=1, NR=1, NB=1, NT=1,
},
muxdemux label ={
cT1=1,
B1=WE
},
circuitikz/muxdemuxes/fill=\nonarchcolor,
append after command={
pic{clk=\tikzlastnode.tpin 1}
},
},
}
% Architectural Flip Flop with We
\tikzset{ff_we/.style={
muxdemux,
muxdemux def={
Lh=\ffsize, Rh=\ffsize, w=\ffwidth, square pins=1,
inset Lh=0, inset Rh=0, inset w=0,
NL=1, NR=1, NB=1, NT=1,
},
muxdemux label ={
cT1=1,
B1=WE,
},
circuitikz/muxdemuxes/fill=\storagecolor,
append after command={
pic{clk=\tikzlastnode.tpin 1}
},
},
}
% Instruction Memory
\tikzset{instr_mem/.style={
muxdemux,
muxdemux def={
Lh=6, Rh=6, w=5, square pins=1,
inset Lh=0, inset Rh=0, inset w=0,
NL=2, NR=2, NB=0, NT=0,
},
muxdemux label ={
L1=A,
R1=RD,
},
draw only left pins={1},
draw only right pins={1},
circuitikz/muxdemuxes/fill=\storagecolor,
circuitikz/muxdemux/inner label font=\scriptsize,
},
}
% PC + 4
\tikzset{PC_4/.style={
muxdemux,
muxdemux def={
Lh=3, Rh=1.4, w=1.5, square pins=1,
inset Lh=1, inset Rh=0, inset w=0.75,
NL=2, NR=1, NB=0, NT=0,
},
circuitikz/muxdemuxes/fill=\processingcolor
},
}
% Register File
\tikzset{RF/.style={
muxdemux,
muxdemux def={
Lh=9, Rh=9, w=5, square pins=1,
inset Lh=0, inset Rh=0, inset w=0,
NL=5, NR=2, NB=0, NT=5,
},
muxdemux label ={
L1=A1, L2=A2, L3=A3, L4=R15, L5=WD3,
R1=RD1, R2=RD2,
cT2=1, T4=WE3
},
draw only top pins={2,4},
circuitikz/muxdemuxes/fill=\storagecolor,
circuitikz/muxdemux/inner label font=\scriptsize,
append after command={
pic{clk=\tikzlastnode.tpin 2}
},
},
}
% Extend Unit
\tikzset{extend/.style={
muxdemux,
muxdemux def={
Lh=2, Rh=2.5, w=6, square pins=1,
inset Lh=0, inset Rh=0, inset w=0,
NL=1, NR=1, NB=0, NT=1,
},
circuitikz/muxdemuxes/fill=\processingcolor
},
}
% MUX\documentclass[border=3pt]{standalone}
\tikzset{mux2to1/.style={
muxdemux,
muxdemux def={
Lh=2, Rh=1.5, w=0.8, square pins=1,
inset Lh=0, inset Rh=0, inset w=0,
NL=2, NR=1, NB=0, NT=1,
},
muxdemux label ={
L1=0, L2=1,
},
circuitikz/muxdemuxes/fill=\muxcolor,
circuitikz/muxdemux/inner label font=\small,
},
}
\tikzset{mux2to1_reverse/.style={
muxdemux,
muxdemux def={
Lh=2, Rh=1.5, w=0.8, square pins=1,
inset Lh=0, inset Rh=0, inset w=0,
NL=2, NR=1, NB=0, NT=1,
},
muxdemux label ={
L1=1, L2=0,
},
circuitikz/muxdemuxes/fill=\muxcolor,
circuitikz/muxdemux/inner label font=\small,
},
}
% ALU
\tikzset{ALU/.style={
muxdemux,
muxdemux def={
Lh=8, Rh=3.5, w=2.5, square pins=1,
inset Lh=2, inset Rh=0, inset w=1.2,
NL=2, NR=1, NB=0, NT=3,
},
circuitikz/muxdemuxes/fill=\processingcolor,
external pins width=1,
},
}
% Data Memory
\tikzset{data_mem/.style={
muxdemux,
muxdemux def={
Lh=8, Rh=8, w=4, square pins=1,
inset Lh=0, inset Rh=0, inset w=0,
NL=3, NR=3, NB=0, NT=6,
},
muxdemux label ={
L1=A, L3=WD,
R3=RD,
cT2=1, T5=WE,
},
draw only left pins={1,3},
draw only right pins={3},
draw only top pins={2,5},
circuitikz/muxdemuxes/fill=\storagecolor,
circuitikz/muxdemux/inner label font=\scriptsize,
append after command={
pic{clk=\tikzlastnode.tpin 2}
},
},
}
% MUX 3 to 1
\tikzset{mux3to1/.style={
muxdemux,
muxdemux def={
Lh=2, Rh=2.4, w=0.8, square pins=1,
inset Lh=0, inset Rh=0, inset w=0,
NL=1, NR=3, NB=0, NT=1,
},
muxdemux label ={
R1=00, R2=01, R3=10,
},
circuitikz/muxdemuxes/fill=\muxcolor,
circuitikz/muxdemux/inner label font=\scriptsize,
},
}
% MUX\documentclass[border=3pt]{standalone}
\tikzset{mux2to1_leftsided/.style={
muxdemux,
muxdemux def={
Lh=2.4, Rh=3, w=0.8, square pins=1,
inset Lh=0, inset Rh=0, inset w=0,
NL=1, NR=2, NB=0, NT=1,
},
muxdemux label ={
R1=0, R2=1,
},
circuitikz/muxdemuxes/fill=\muxcolor,
circuitikz/muxdemux/inner label font=\small,
},
}
% Control Signal
\newcommand{\control}[3]{
\node[#3] at (#2) {\ttfamily\scriptsize\color{\controlcolor}#1};
}
\begin{document}
\begin{tikzpicture}
%%%% Components %%%%
% PC
\node[ff_we] (PC)
at (0,0) {PC};
% Instruction Memory
\node[instr_mem, anchor=lpin 1, xshift=0.5cm] (instr_mem)
at (PC.rpin 1) {\\[4mm]Instruction\\Memory};
% IR
\node[non_arch_ff_we, anchor=lpin 1, xshift=0.5cm] (IR)
at (instr_mem.rpin 1) {IR};
% PC + 4
\node[PC_4] (PCPlus4)
at ($(instr_mem.center) + (0,-3.5)$) {+};
% PC p4
\node[non_arch_ff] (PC_p4)
at (IR.bpin 1|-PCPlus4) {PC\\p4};
% PC + 8
\node[PC_4, anchor=lpin 2, shift={(2cm,1cm)}] (PCPlus8)
at (PC_p4.rpin 1) {+};
% Register File
\node[RF, anchor=lpin 4, xshift=4cm] (RF)
at (PCPlus8.rpin 1) {Register\\File};
% Extend Unit
\node[extend, yshift=-2cm] (Extend)
at (RF.bottom) {Extend};
% MUX A1
\node[mux2to1, anchor=brpin 1, xshift=-4.5cm] (mux2to1_A1)
at (RF.lpin 1) {};
% MUX A2
\node[mux2to1, anchor=brpin 1, xshift=-3cm] (mux2to1_A2)
at (RF.lpin 2) {};
% MUX A3
\node[mux2to1, anchor=brpin 1, xshift=-1.5cm] (mux2to1_A3)
at (RF.lpin 3) {};
% MUX WD3
\node[mux2to1_reverse, anchor=blpin 1, xshift=-0.23cm] (mux2to1_WD3)
at (PC_p4.brpin 1-|mux2to1_A3) {};
% A
\node[non_arch_ff, anchor=rpin 1, xshift=1.5cm] (A)
at (RF.rpin 1) {A};
% B
\node[non_arch_ff, anchor=rpin 1, xshift=1.5cm] (B)
at (RF.rpin 2) {B};
% I
\node[non_arch_ff] (I)
at (Extend.rpin 1-|A) {I};
% MUX B
\node[mux2to1, anchor=blpin 1, xshift=1.5cm] (mux2to1_B)
at (B.brpin 1) {};
% ALU
\node[ALU, anchor=lpin 2, xshift=0cm] (ALU)
at (mux2to1_B.rpin 1) {\rotatebox{90}{ALU}};
% MA
\node[non_arch_ff_we, anchor=rpin 1, xshift=1cm] (MA)
at (ALU.rpin 1) {MA};
% Status Register
\node[ff_we] (SR)
at (MA|-ALU.tpin 3) {SR};
% Data Memory
\node[data_mem, anchor=lpin 1, xshift=1cm] (data_mem)
at (MA.rpin 1) {Data\\Memory};
% WD
\node[non_arch_ff, anchor=rpin 1, xshift=-1cm] (WD)
at (data_mem.lpin 3) {WD};
% MUX 3 to 1
\node[mux3to1, yshift=-3cm] (mux3to1)
at (PCPlus4) {};
% MUX\documentclass[border=3pt]{standalone}
\node[mux2to1_leftsided] (mux2to1_leftsided)
at (mux3to1.rpin 3-|WD) {};
% S
\node[non_arch_ff, anchor=lpin 1, xshift=0.2cm] (S)
at (mux2to1_leftsided.rpin 1) {S};
% RD
\node[non_arch_ff] (RD)
at (mux2to1_leftsided.rpin 2-|data_mem) {RD};
%%%% Connections %%%%
% Buses of 32 bits
\draw[ultra thick]
(PC.brpin 1) -- (instr_mem.blpin 1)
%
(instr_mem.brpin 1) -- (IR.blpin 1)
%
(PCPlus4.blpin 1) -| ($(PC.rpin 1)!0.5!(instr_mem.lpin 1)$)
(PCPlus4.brpin 1) -- (PC_p4.blpin 1)
(PC_p4.brpin 1) -| (PCPlus8.lpin 2) -- (PCPlus8.blpin 2)
%
(PCPlus8.brpin 1) -- (RF.blpin 4)
%
(IR.brpin 1) -- +(0.7,0) coordinate (ir_tmp)
-- (ir_tmp|-ALU.tpin 1)
-- (ir_tmp|-Extend.lpin 1)
-- (Extend.blpin 1)
%
(mux2to1_WD3.brpin 1) -- ++(0.3,0) |- (RF.blpin 5)
(mux2to1_WD3.blpin 1) -- (PC_p4.brpin 1)
(mux2to1_WD3.blpin 2) -- (mux2to1_WD3.lpin 2)
-- (mux2to1_WD3.lpin 2|-mux3to1.rpin 3)
%
(RF.brpin 1) -- (A.blpin 1)
(RF.brpin 2) -- (B.blpin 1)
%
(Extend.brpin 1) -- (I.blpin 1)
%
(B.brpin 1) -- (mux2to1_B.blpin 1)
(I.brpin 1) -| (mux2to1_B.lpin 2) -- (mux2to1_B.blpin 2)
%
(ALU.blpin 1) -- (A.brpin 1)
(ALU.blpin 2) -- (mux2to1_B.brpin 1)
%
(ALU.brpin 1) -- (MA.blpin 1)
%
(MA.brpin 1) -- (data_mem.blpin 1)
%
(data_mem.blpin 3) -- (WD.brpin 1)
(data_mem.brpin 3) -- (data_mem.rpin 3) |- (RD.rpin 1) -- (RD.brpin 1)
%
(WD.blpin 1) -| ($(B.brpin 1)!0.5!(mux2to1_B.blpin 1)$)
%
(mux3to1.blpin 1) -| ($(PC.lpin 1)+(-0.4,0)$) -- (PC.blpin 1)
(mux3to1.brpin 1) -| ($(PC_p4.brpin 1)+(0.35,0)$)
(mux3to1.brpin 2) -| ($(ALU.brpin 1)!0.5!(MA.blpin 1)$) coordinate (ALU_tmp)
(mux3to1.brpin 3) -- (mux2to1_leftsided.blpin 1)
%
(mux2to1_leftsided.brpin 1) -- (S.blpin 1)
(mux2to1_leftsided.brpin 2) -- (RD.blpin 1)
%
(S.brpin 1) -- (S.rpin 1) -- ++(0,1.4cm) coordinate (S_tmp)
-- (S_tmp-|ALU_tmp)
%
(ALU.btpin 1) -- (ALU.tpin 1) |- (ALU.tpin 1-|ir_tmp) -- (ir_tmp);
% Smaller Buses
\draw[thick]
(mux2to1_A1.brpin 1) -- (RF.blpin 1)
(mux2to1_A1.blpin 1) -- (mux2to1_A1.blpin 1-|ir_tmp)
%
(mux2to1_A3.brpin 1) -- (RF.blpin 3)
(mux2to1_A3.blpin 1) -- (mux2to1_A3.blpin 1-|ir_tmp)
%
(mux2to1_A2.brpin 1) -- (RF.blpin 2)
(mux2to1_A2.blpin 1) -- (mux2to1_A2.blpin 1-|ir_tmp)
(mux2to1_A2.blpin 2) -| (mux2to1_A2.lpin 1|-mux2to1_A3.blpin 1)
%
(ALU.btpin 3) -- (ALU.tpin 3) -- (SR.blpin 1)
[-stealth] (SR.brpin 1) -- (SR.rpin 1)
-- +(0,1.2) node[right,pos=0.45] {\rotatebox{-90}{\small{Flags}}};
%%%% Control %%%%
\control{PCWrite}{PC.bpin 1}{below};
%
\control{IRWrite}{IR.bpin 1}{below};
%
\control{ImmSrc[1:0]}{Extend.tpin 1}{above};
%
\control{RegSrc[0]}{mux2to1_A1.tpin 1}{above};
%
\draw (mux2to1_A2.tpin 1) -- (mux2to1_A2.tpin 1|-mux2to1_A1.tpin 1)
coordinate (control_mux2to1_A1);
\control{RegSrc[1]}{control_mux2to1_A1}{above};
%
\draw (mux2to1_A3.tpin 1) -- (mux2to1_A3.tpin 1|-mux2to1_A1.tpin 1)
coordinate (control_mux2to1_A3);
\control{RegSrc[2]}{control_mux2to1_A3}{above};
%
\draw (mux2to1_WD3.tpin 1) -- (mux2to1_A3.bottom);
%
\control{RegWrite}{RF.tpin 4}{above};
%
\control{ALUSrc}{mux2to1_B.tpin 1}{above};
%
\control{ALUControl[2:0]}{ALU.tpin 2}{above};
%
\control{FlagsWrite}{SR.bpin 1}{below};
%
\control{MAWrite}{MA.bpin 1}{below};
%
\control{MemWrite}{data_mem.tpin 5}{above};
%
\control{PCSrc[1:0]}{mux3to1.tpin 1}{above};
%
\control{MemtoReg}{mux2to1_leftsided.tpin 1}{above};
%%%% Inputs %%%%
\node[left] at (PCPlus4.lpin 2) {\ttfamily4};
%
\node[left] at (PCPlus8.lpin 1) {\ttfamily4};
%
\node[left] at (mux2to1_A1.lpin 2) {\ttfamily15};
%
\node[left] at (mux2to1_A3.lpin 2) {\ttfamily14};
%%%% Instruction Bits %%%%
\node[above] at
($(mux2to1_A1.blpin 1-|ir_tmp)!0.24!(mux2to1_A1.blpin 1)$)
{\scriptsize\ttfamily19:16};
%
\node[above] at
($(mux2to1_A2.blpin 1-|ir_tmp)!0.1!(mux2to1_A2.blpin 1)$)
{\scriptsize\ttfamily3:0};
%
\node[above] at
($(mux2to1_A3.blpin 1-|ir_tmp)!0.09!(mux2to1_A3.blpin 1)$)
{\scriptsize\ttfamily15:12};
%
\node[above] at
($(Extend.blpin 1-|ir_tmp)!0.06!(Extend.blpin 1)$)
{\scriptsize\ttfamily23:0};
%
\node[above] at
($(ALU.tpin 1-|ir_tmp)!0.024!(ALU.tpin 1)$)
{\scriptsize\ttfamily11:5};
%%%% Labels %%%%
\node[label_args, above, xshift=-1.5pt] at
(PC.lpin 1) {PC'};
\node[label_args, above] at
($(PC.rpin 1)!0.5!(instr_mem.lpin 1)$) {PC};
\node[label_args, above] at
($(instr_mem.rpin 1)!0.5!(IR.lpin 1)$) {Instr};
\node[label_args, above] at
($(PCPlus4.rpin 1)!0.5!(PC_p4.lpin 1)$) {PCPlus4};
\node[label_args, below, xshift=0.6cm] at
(I.rpin 1) {ExtImm};
\node[label_args, above] (SrcB) at
($(mux2to1_B.brpin 1)!0.5!(ALU.blpin 2)$) {SrcB};
\node[label_args, above] at
(A-|SrcB) {SrcA};
\node[label_args, above] at
(WD.lpin 1-|ALU.blpin 2) {WriteData};
\node[label_args, above, xshift=-0.9cm] at
(S_tmp) {ALUResult};
\node[label_args, above] at
(mux2to1_leftsided-|mux2to1_WD3) {Result};
\node[label_args, above] (WA) at
($(mux2to1_A3.rpin 1)!0.5!(RF.lpin 3)$) {WA};
\node[label_args, above] at
(WA|-mux2to1_A1) {RA1};
\node[label_args, above] at
(WA|-mux2to1_A2) {RA2};
\node[label_args, above] at
(WA|-PCPlus8) {PCPlus8};
\end{tikzpicture}
\end{document}
Control Unit
\documentclass[border=3pt]{standalone}
%%Fonts
%\usepackage{fontspec}
%\setmainfont[Mapping=tex-text]{Times New Roman}
%\setmonofont[Mapping=tex-text]{JetBrains Mono}
%Drawing
\usepackage{tikz}
\usetikzlibrary{calc, positioning}
% Circuits
\usepackage{circuitikz}
% Lengths
\def\instrdeclen{7}
\def\fsmlen{10}
\def\condlogiclen{4}
\def\width{10.5}
% Node specifics
\def\fillcolor{cyan!60}
\def\innderlabelfont{\scriptsize}
% Connections
\def\outlen{1.5cm}
\tikzset{
every node/.style={rounded corners=0.5cm},
% Instruction Decoder
instr_dec/.style={
muxdemux,
muxdemux def={
Lh=\instrdeclen, Rh=\instrdeclen, w=\width, square pins=1,
inset Lh=0, inset Rh=0, inset w=0,
NL=2, NR=5, NB=2, NT=0,
},
muxdemux label ={
L1=op, L2=funct,
R1=RegSrc, R2=ALUSrc, R3=MemtoReg, R4=ALUControl, R5=ImmSrc,
B1=NoWrite\_in, B2=BL\_in,
},
circuitikz/muxdemuxes/fill=\fillcolor,
circuitikz/muxdemux/inner label font=\innderlabelfont,
},
% FSM
fsm/.style={
muxdemux,
muxdemux def={
Lh=\fsmlen, Rh=\fsmlen, w=\width, square pins=1,
inset Lh=0, inset Rh=0, inset w=0,
NL=3, NR=7, NB=0, NT=0,
},
muxdemux label ={
L1=op, L2=S/L, L3=R\_d,
R1=IRWrite, R2=RegWrite, R3=MAWrite, R4=MemWrite, R5=FlagsWrite, R6=PCSrc, R7=PCWrite,
B1=NoWrite\_in,
},
circuitikz/muxdemuxes/fill=\fillcolor,
circuitikz/muxdemux/inner label font=\innderlabelfont,
},
% Conditional Logic
cond_logic/.style={
muxdemux,
muxdemux def={
Lh=\condlogiclen, Rh=\condlogiclen, w=\width, square pins=1,
inset Lh=0, inset Rh=0, inset w=0,
NL=2, NR=0, NB=0, NT=1,
},
muxdemux label ={
L1=cond, L2=flags,
T1=CondEx\_in,
},
circuitikz/muxdemuxes/fill=\fillcolor,
circuitikz/muxdemux/inner label font=\innderlabelfont,
},
% Label
label/.style={
font=\large\bfseries,
align=center,
},
% Connection
connection/.style={
thin,
},
% Input
input/.style={
font=\scriptsize\ttfamily, above, xshift=-0.2cm,
},
% Output
output/.style={
font=\ttfamily, right,
},
}
\begin{document}
\begin{tikzpicture}[node distance = 1cm]
% Components
\node[instr_dec, label]
(instr_dec) {Instruction\\Decoder};
\node[fsm, label, anchor = north, below=of instr_dec.south]
(fsm) {FSM};
\node[cond_logic, label, anchor = north, below=of fsm.south]
(cond_logic) {Conditional\\Logic};
% Connections
% Instruction Decoder Output
\draw[connection] (instr_dec.brpin 1) -- ++(\outlen,0) node[output] {RegSrc};
\draw[connection] (instr_dec.brpin 2) -- ++(\outlen,0) node[output] {ALUSrc};
\draw[connection] (instr_dec.brpin 3) -- ++(\outlen,0) node[output] {MemtoReg};
\draw[connection] (instr_dec.brpin 4) -- ++(\outlen,0) node[output] {ALUControl};
\draw[connection] (instr_dec.brpin 5) -- ++(\outlen,0) node[output] {ImmSrc};
%
\draw[connection] (instr_dec.blpin 1) -- ++(-\outlen,0) node[input, pos=0.4] {27:26};
\draw[connection] (instr_dec.blpin 2) -- ++(-\outlen,0) node[input, pos=0.4] {25:20};
% FSM Input
\draw[connection, -stealth] (cond_logic.top) -- (fsm.bottom);
\draw[connection, -stealth] (instr_dec.bbpin 1) -- (instr_dec.bbpin 1|-fsm.top);
\draw[connection, -stealth] (instr_dec.bbpin 2) -- (instr_dec.bbpin 2|-fsm.top);
%
\draw[connection] (fsm.blpin 1) -- ++(-\outlen,0) node[input, pos=0.4] {27:26};
\draw[connection] (fsm.blpin 2) -- ++(-\outlen,0) node[input, pos=0.4] {20};
\draw[connection] (fsm.blpin 3) -- ++(-\outlen,0) node[input, pos=0.4] {15:12};
% FSM Output
\draw[connection] (fsm.brpin 1) -- ++(\outlen,0) node[output] {IRWrite};
\draw[connection] (fsm.brpin 2) -- ++(\outlen,0) node[output] {RegWrite};
\draw[connection] (fsm.brpin 3) -- ++(\outlen,0) node[output] {MAWrite};
\draw[connection] (fsm.brpin 4) -- ++(\outlen,0) node[output] {MemWrite};
\draw[connection] (fsm.brpin 5) -- ++(\outlen,0) node[output] {FlagsWrite};
\draw[connection] (fsm.brpin 6) -- ++(\outlen,0) node[output] {PCSrc};
\draw[connection] (fsm.brpin 7) -- ++(\outlen,0) node[output] {PCWrite};
% Conditional Logic Input
\draw[connection] (cond_logic.blpin 1) -- ++(-\outlen,0) node[input, pos=0.4] {31:28};
\draw[connection] (cond_logic.blpin 2) -- ++(-\outlen,0) coordinate (in);
% Input to Control Unit
\draw[very thick]
($(fsm.left)!0.5!(cond_logic.left) + (-3cm,0)$) node[output, left] (IR) {IR} --
(IR-|in) --
($(in|-instr_dec.lpin 1) + (0,0.3)$) --
($(in|-cond_logic.lpin 1) + (0,-0.3)$);
\draw[very thick]
(cond_logic.blpin 2) -- ++(-3cm,0) node[output, left] {SR};
\node[
draw,
ultra thick,
cyan,
fill=cyan,
fill opacity=0.2,
rectangle,
minimum height=16cm,
minimum width=9cm,
yshift=1.5cm,
xshift=-0.8cm] (control) at (fsm) {};
\node[yshift=-0.5cm] at (control.north) {\LARGE\bfseries Control};
\end{tikzpicture}
\end{document}
FSM Schematic
\documentclass[border=3pt]{standalone}
%%Fonts
%\usepackage{fontspec}
%\setmainfont[Mapping=tex-text]{JetBrains Mono}
% Tikz
\usepackage{tikz}
\usetikzlibrary{calc, positioning}
\tikzset{
node distance = 1.5cm and 1.5cm,
state/.style={
draw,
very thick,
shape=circle,
inner sep=0pt,
outer sep=2pt,
text width=25pt,
align=center,
fill=gray!30,
},
S0/.style={
draw=gray!100,
fill=gray!20,
},
S1/.style={
draw=green!70!black,
fill=green!20,
},
S2/.style={
draw=magenta!100,
fill=magenta!20,
},
S3/.style={
draw=cyan!100,
fill=cyan!20,
},
S4/.style={
draw=orange!100,
fill=orange!20,
},
connection/.style={
-stealth,
},
label/.style={
font=\tiny\ttfamily,
align=center,
}
}
% Notation
\usepackage{amsmath}
\begin{document}
\begin{tikzpicture}
% State 0
\node[state, S0] (S0) {S0};
% State 1
\node[state, below = of S0, S1] (S1) {S1};
% State 2
\node[state, below = of S1, S2] (S2a) {S2a};
\node[state, right = of S2a, S2] (S2b) {S2b};
% State 3
\node[state, below = of S2a, S3] (S3) {S3};
% State 4
\node[state, below = of S3, S4] (S4a) {S4a};
%% Right
\node[state, right = of S4a, S4] (S4b) {S4b};
\node[state, right = of S4b, S4] (S4e) {S4e};
\node[state, right = of S4e, S4] (S4f) {S4f};
\node[state, right = of S4f, S4] (S4g) {S4g};
%% Left
\node[state, left = of S4a, S4] (S4d) {S4d};
\node[state, left = of S4d, S4] (S4c) {S4c};
\node[state, left = of S4c, S4] (S4h) {S4h};
\node[state, left = of S4h, S4] (S4i) {S4i};
% Connections
% Reset
\draw[connection] (-1,0) -- (S0) node[pos=-1.5] {\texttt Reset};
% S0 ->
\draw[connection] (S0) -- (S1);
% S1 ->
\draw[connection] (S1) -- (S2a)
node[label, pos = 0.5, xshift=-10] {op=01\\cEx=1};
\draw[connection] (S1) -- (S2b)
node[label, pos = 0.5, anchor=35] {op=00\\cEx=1\\NoW=0};
\draw[connection] (S1) -- (S4g.120)
node[label, pos = 0.5, anchor=south west] {op=00\\cEx=1\\NoW=1};
\draw[connection] (S1) -- (S4c)
node[label, pos = 0.65, anchor=base east] {cEx=0};
\draw[connection] (S1) -- (S4h)
node[label, pos = 0.65, anchor=base east] {op=10\\cEx=1\\BL\_in=0};
\draw[connection] (S1) -- (S4i)
node[label, pos = 0.65, anchor=base east] {op=10\\cEx=1\\BL\_in=1};
% S2a ->
\draw[connection] (S2a) -- (S3)
node[label, pos = 0.5, right] {L=1};
\draw[connection] (S2a) -- (S4d)
node[label, pos = 0.5, left] {L=0};
% S2b ->
\draw[connection] (S2b) -- (S4a)
node[label, pos = 0.5, right] {S=0\\Rd!=15};
\draw[connection] (S2b) -- (S4b)
node[label, pos = 0.5, right] {S=0\\Rd=15};
\draw[connection] (S2b) -- (S4e)
node[label, pos = 0.58, above right] {S=1\\Rd!=15};
\draw[connection] (S2b) -- (S4f)
node[label, pos = 0.58, above right] {S=1\\Rd=15};
% S3 ->
\draw[connection] (S3) -- (S4a)
node[label, pos = 0.5, left] {Rd!=15};
\draw[connection] (S3) -- (S4b)
node[label, pos = 0.45, anchor=base west] {Rd=15};
% S4g ->
\draw[connection] (S4g) -- ++(0,-1) -| ++(1,0) coordinate (S4g_temp) --
(S0-|S4g_temp) coordinate (S4g_temp) -- (S0);
% S4f ->
\draw[connection] (S4f) -- ++(0,-1) -| (S4g_temp) -- (S0);
% S4e ->
\draw[connection] (S4e) -- ++(0,-1) -| (S4g_temp) -- (S0);
% S4b ->
\draw[connection] (S4b) -- ++(0,-1) -| (S4g_temp) -- (S0);
% S4a ->
\draw[connection] (S4a) -- ++(0,-1) -| (S4g_temp) -- (S0);
% S4d ->
\draw[connection] (S4d) -- ++(0,-1) -| (S4g_temp) -- (S0);
% S4c ->
\draw[connection] (S4c) -- ++(0,-1) -| (S4g_temp) -- (S0);
% S4h ->
\draw[connection] (S4h) -- ++(0,-1) -| (S4g_temp) -- (S0);
% S4i ->
\draw[connection] (S4i) -- ++(0,-1) -| (S4g_temp) -- (S0);
\end{tikzpicture}
\end{document}