kavita arora (m3-1) *lisa gentry (m3-2) steven wasik (m3-3) karolina werner (m3-4)

M3: ProDiver 525M3: ProDiver 525Kavita Arora (M3-1)Kavita Arora (M3-1)*Lisa Gentry (M3-2)*Lisa Gentry (M3-2)Steven Wasik (M3-3)Steven Wasik (M3-3)Karolina Werner Karolina Werner (M3-4)(M3-4)

Stage : Stage : 4 Feb 044 Feb 04Size Size Estimates/Estimates/Floor PlanFloor Plan

Overall Project Objective:To design a chip for a SCUBA diver that does real-time calculations to warn To design a chip for a SCUBA diver that does real-time calculations to warn the diver of safety concerns including decompressions sickness and lung the diver of safety concerns including decompressions sickness and lung overexpansion.overexpansion.

Design Manager: Design Manager: Steven BeigelmacherSteven Beigelmacher

M3: ProDiver 525M3: ProDiver 525

StatusStatus

• Specification definition (done)Specification definition (done)• ArchitectureArchitecture

– Matlab Simulation (done)Matlab Simulation (done)– Verilog Simulation (done)Verilog Simulation (done)– Hardware diagrams (done)Hardware diagrams (done)– Floor Plan (done)Floor Plan (done)– Gate Level Design (done)Gate Level Design (done)

• Gate Level Verification (in progress)Gate Level Verification (in progress)• Component Layout (next week…)Component Layout (next week…)• Reevaluation of Floorplan (next week…)Reevaluation of Floorplan (next week…)

• Still have a long way to go…Still have a long way to go…


Design DecisionsDesign Decisions

• Changed the comparators from signed Changed the comparators from signed comparators to unsigned comparators, by comparators to unsigned comparators, by looking only at the carry-out bit and not looking only at the carry-out bit and not the carry-out bit and the sum, in order to the carry-out bit and the sum, in order to minimize transistorsminimize transistors

• Changed the ROM from having values Changed the ROM from having values every five units to every four in order to every five units to every four in order to minimize control logicminimize control logic


New Comparator Layout – New Comparator Layout – comp5bitcomp5bit


Verilog Verification (gate Verilog Verification (gate level)level)

MATLAB:depthvector = [80*ones(1,60*35) 40*ones(1,60*20) 0*ones(1,60*40)];[bodyvector,out]=pressurecalculator(depthvector);bodyvector(60*35): ans = 25.5304bodyvector(60*55): ans = 28.3850bodyvector(60*95): ans = 18.2900

SCENERIO: diver goes 80 feet for 35 min, 40 feet for 20 min, 0 feet for 40 min

VERILOG:time= 2,safetywatch = 0Test where the user will go down to 80 feet for 35 minutes, then 40 feet for 20 minutes, then 0 feet 40 minutestime= 6090,safetywatch = 1time = 6305,pres=25,depth= 80time= 9054,safetywatch = 2time = 9908,pres=28,depth= 40time= 10272,safetywatch = 1time= 12165,safetywatch = 0time = 17110, pres=18,depth= 0


Previous Transistor CountPrevious Transistor CountMODULE= # MODULE= # transistorstransistors

SUBMODULES (# SUBMODULES (# transistors)transistors)


Get K = 926Get K = 926 Control logic (68)Control logic (68) 3 7-bit comparators (858)3 7-bit comparators (858)

Pressure Calculator = Pressure Calculator = 36483648

2C to SM conv, 9 ,26 (1162)2C to SM conv, 9 ,26 (1162)

Multiplier, 8 by 4 (912)Multiplier, 8 by 4 (912)Register, 25 bit (400)Register, 25 bit (400)

Subtractor, 9 bit (324)Subtractor, 9 bit (324)

Adder, 25 bit (850)Adder, 25 bit (850)

Safety Watch = 656Safety Watch = 656 3 5-bit comparators (642)3 5-bit comparators (642) Control logic (14)Control logic (14)

Ascension Watch = Ascension Watch = 15641564

6 registers, 8 bit (768)6 registers, 8 bit (768)


Comparator 8 bit (322)Comparator 8 bit (322)

2C -> SM conversion, 9 bit 2C -> SM conversion, 9 bit (144)(144)

Control logic (6)Control logic (6)

Bottom Time = 1852Bottom Time = 1852 Registers, 8 bit and 17 bit Registers, 8 bit and 17 bit (400)(400)

3 8 bit subtractors (864)3 8 bit subtractors (864)

Addone 4 bit, 17 bit (294)Addone 4 bit, 17 bit (294)



Time to Flight = 1836Time to Flight = 1836 ROM (64), demux (308)ROM (64), demux (308)

Register, 17 bit (272)Register, 17 bit (272)Minus1, 17 bit (272)Minus1, 17 bit (272)

GetMax, 17 bit (920)GetMax, 17 bit (920)

Max Depth = 596Max Depth = 596 Register, 8 bit (128)Register, 8 bit (128) GetMax, 8 bit (468)GetMax, 8 bit (468)

Time Left = 2026Time Left = 2026 Register, 8 bit x 2(256)Register, 8 bit x 2(256)

subtractor, 8 bit x 2 (576)subtractor, 8 bit x 2 (576)ROM (160), demux (724)ROM (160), demux (724)

Control logic- muxes (310)Control logic- muxes (310)

TOTAL = 13104TOTAL = 13104


Actual Transistor CountActual Transistor CountMODULE= # MODULE= # transistorstransistors



Get K = 620Get K = 620 Control logic (68)Control logic (68) 3 7-bit comparators (552)3 7-bit comparators (552)

Pressure Calculator = Pressure Calculator = 36483648

2C to SM conv, 9 ,26 (1162)2C to SM conv, 9 ,26 (1162)

Multiplier, 8 by 4 (912)Multiplier, 8 by 4 (912)Register, 25 bit (400)Register, 25 bit (400)


Adder, 25 bit (850)Adder, 25 bit (850)

Safety Watch = 404Safety Watch = 404 3 5-bit comparators (390)3 5-bit comparators (390) Control logic (14)Control logic (14)

Ascension Watch = Ascension Watch = 14521452

6 registers, 8 bit (768)6 registers, 8 bit (768)



2C -> SM conversion, 9 bit 2C -> SM conversion, 9 bit (144)(144)


Bottom Time = 1768Bottom Time = 1768 Registers, 8 bit and 17 bit Registers, 8 bit and 17 bit (400)(400)

3 8 bit subtractors (864)3 8 bit subtractors (864)

Addone 4 bit, 17 bit (294)Addone 4 bit, 17 bit (294)



Time to Flight = 1836Time to Flight = 1836 ROM (64), demux (308)ROM (64), demux (308)

Register, 17 bit (272)Register, 17 bit (272)Minus1, 17 bit (272)Minus1, 17 bit (272)

GetMax, 17 bit (920)GetMax, 17 bit (920)

Max Depth = 596Max Depth = 596 Register, 8 bit (128)Register, 8 bit (128) GetMax, 8 bit (468)GetMax, 8 bit (468)

Time Left = 2026Time Left = 2026 Register, 8 bit x 2(256)Register, 8 bit x 2(256)

subtractor, 8 bit x 2 (576)subtractor, 8 bit x 2 (576)ROM (160), demux (724)ROM (160), demux (724)

Control logic- muxes (310)Control logic- muxes (310)

TOTAL = 12350TOTAL = 12350


Gate Level Schematic – Top Gate Level Schematic – Top LevelLevel


Gate Level Schematic – Pressure Gate Level Schematic – Pressure CalculatorCalculator


Gate Level Schematic – Gate Level Schematic – bottomTimebottomTime


Gate Level Schematic - Gate Level Schematic - safetyWatchsafetyWatch


Gate Level Schematic - Gate Level Schematic - ascensionWatchascensionWatch


Gate Level Schematic - getKGate Level Schematic - getK


Gate Level Schematic - Gate Level Schematic - timetoflighttimetoflight


Gate Level Schematic - Gate Level Schematic - timeLefttimeLeft


Gate Level Schematic - Gate Level Schematic - timetoflightROMtimetoflightROM


Gate Level Schematic – Gate Level Schematic – timeLefttimeLeft ROM1 ROM2 ROM1 ROM2


Gate Level Schematic – Gate Level Schematic – multipliermultiplier


Critical PathCritical Path

• Critical Path – From the Critical Path – From the depth input through depth input through pressureCalc, then pressureCalc, then through safetywatch, through safetywatch, and out to the and out to the safetywatch output safetywatch output signalsignal

• Critical path unimportant Critical path unimportant because the clock speed because the clock speed is 1 secondis 1 second


Questions?Questions?

kavita arora (m3-1) *lisa gentry (m3-2) steven wasik (m3-3) karolina werner (m3-4)

Documents

depth input

unsigned comparators

progresscomponent layout

godesign decisionschanged

long way

weekreevaluation of

clock speed