CS370 Computer ArchitectureLab 3Total Points: 150Goal:The purpose of this project is to create Finite State Machine (FSM) which can detect acertain eight-digit binary sequence in a continuous serial binary input stream. When thecorrect sequence is detected, the single output signal should be a logical true value, in allother cases it should be a logical false. This project is designed to allow a gradual transitionfrom strictly combinational circuits to a simple sequential circuit. Note that this labassignment is a group assignment with each group having no more than 2 students. (Youare free to work by yourself.) (You may have a different partner with Lab2.)Problem Statement: The “Gottcha Anti-Theft” MachineThere are many anti-theft devices on the market that attempt to foil a would-be robberfrom starting your car and driving off with it. One popular item has a keypad like a touchtone telephone. In order to start your car, you must key in a secret four-digit decimal code,such as ‘3719’. It only “remembers” the most recent four digits you have keyed in. Thus,the sequence ‘3723719’ will let you start your car.For simplicity here we use a code based on a sequence of eight bits, and use two pushbuttons to enter a sequence serially (as shown in Fig. 1). Each press of a button enters thecorresponding digit. As you key in the bits in sequence, the device outputs E = 0 untilthe most recent eight bits agree with a built-in secret code byte. Then E switches to 1.Fig. 1. The Gottcha machine in action.The shut-off gottcha: If 16 bits are toggled in without the secret code being observed, thesystem shuts off and won’t accept any more bits. Add a RESET button to the system thatpresumably only the owner could control: when RESET is pressed the system is againenabled and can accept bits.Design and test (on LogicWorks) the miracle Gottcha machine. Do this in two differentways (thus designing and simulating two different circuits):• (1) The Factory Preset Model: The specific secret byte preset at the factory MUST beone of your team members’ secret keys. For groups with single member, please useyour assigned secret key. A table of secret key corresponding to each student’s RedIDis attached to this document (see Appendix). You can find your secret key from thetable. All groups, please explicitly explain which key is used for Factory Preset Modelin your readme.txt file. Your group will receive ZERO point if you don’t follow thiskey use policy specified above. Do NOT use registers: solve for the finite state machinewith the fewest states and flip-flops possible.• (2) The User-Programmable Model: This machine allows the car owner to enter asecret byte into a register. The user selects a byte using two hex keyboards, andpresses an ENTERCODE pushbutton to store the code word. Now when the machine isused “in the field”, the car owner enters a sequence using the same pushbuttonarrangement as for the previous machine. When the sequence so entered matches thecode word stored in the register, E goes HIGH (i.e. logical true). As with the FactoryPreset Model, if more than 16 bits are entered without the proper sequence beingobserved, the system shuts off (until RESET is pressed).Some Hints:• (1) These systems have no actual clock – the release of either pushbutton produces atransition that is used to trigger the flip-flops involved. The main flip-flops in the circuitare triggered by this transition.• (2) You might put the outputs of the two pushbuttons into asynchronous inputs of aflip-flop, which therefore instantly stores the value (i.e. informs “which” pushbuttonwas pressed) of the newest input bit. The output of this flip-flop is then used as theactual “input” value.• (3) Use a shift register in Part2 (i.e. the User-Programmable Model) to store the mostrecently received bits. Compare the shift register output to the programmed codeword. (So Part2 is very simple.)Submission Instructions:• Write a readme.txt file that includes (1) your group member names and thecontribution of each member (who did what); (2) list each file enclosed in yoursubmission package and briefly explain its function and usage; (3) explicitly explainwhich key is used for the Factory Preset Model; (4) indicate whether you useLogicWorks installed on remote computers or your own computer (Due to differentLogicWorks versions, the files created through your own installation may not beopened by remote computer installations successfully).• Write a design documentation (.docx or .pdf file) to give a brief description of thedesign process you used to obtain the circuits. Be sure to point out why you chose aparticular design, along with the steps you took to minimize the amount of hardwarerequired in each case.• Your LogicWorks files should include your circuit schematic file (.cct) and your libraryfile (.clf). In your .cct file, please document each section using the Text tool (Ctrl_E)so that we know how it works. Note that documentation is essential for FULL credit.• You MUST include the FINAL TEST circuits for both Part1 (the Factory Preset Model)and Part2 (the Factory Preset Model), like shown on the last two slides of“lec17_Lab3.pdf”.• Zip ALL files into one document and name it with the first initial of your first name andyour last name. For example, student Andrew Jordan’s zip file would beajordan.zip.• Submit your zip file in Canvas. Note that EVERY student is required to submit (thesubmission of two members from the same group should be the same).Appendix: Secret Keys for Factory Preset Model
RedID
Secret Key
RedID
Secret Key
821836022
11010101
822493640
11001101
819565078
11011101
819420128
11011111
823103028
10011001
824071346
11100110
811754860
10101111
824856221
00101101
822719047
01011001
808772855
01110000
819666595
10110110
823324977
11101101
819818188
10000100
824243492
01001100
822920430
10011011
825449528
01000111
819173323
01111110
825538318
01001010
819507228
10111010
821009339
11100010
823023351
11110110
822774843
10100100
823197473
11010100
821911084
11110001
821531679
10101011
823233990
10101101
821448934
10011111
823005190
01011011
819479798
01011000
822598342
01111011
821199074
10111111
825221404
01110111
820601230
11110010
822687158
10011000
822200581
01011101
824474983
11011001
822758164
10100111
825643592
00110111
822914112
10110000
820821671
00011010
823234341
01000010
822791028
01001011
822569677
11010111
822246796
01011010
819138431
01100011
823022506
10010010
823189309
01101010
822288474
11111000
820784452
01110001
821539102
01110011
815801604
01010111
813668291
11110101
822511983
10111100
817551131
11001100
818499832
11001110
822492808
01000101
825770940
01011100
822202323
01001110
825172472
11100011
822201595
01100010
825209977
11110000
823510318
11010000
812172342
10010100
823306751
10101110
825059736
11110011
821699873
01100000
822770800
10001001
824348454
11000110
822331036
11101010
822808357
10101000
822680970
00110110
819202287
11010010
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