M3: ProDiver 525

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Kavita Arora (M3-1) Lisa Gentry (M3-2) Steven
Wasik (M3-3) Karolina Werner (M3-4)
Stage 2 Feb 04 Size Estimates/ Floor Plan
Design Manager Steven Beigelmacher
Overall Project Objective 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 overexpansion.
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Status

• Specification definition (done)
• Architecture
• Matlab Simulation (done)
• Verilog Simulation (done)
• Hardware diagrams (done)
• Verification of Verilog - Gate Level (done)
• Floorplanning (done)
• Gate level design schematic (next week)
• ROMs (next week)
• Critical Path Estimation (next week)
• Still have a long way to go

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Design Decisions

• We will use a nor based pre-charged rom
• We fixed the time to flight module to be more
  correct

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Overall Architecture (final)
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Pressure Calculator Module
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Time Left Module
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ROM (nor based pre-charged)
This is our ROM for The time to flight module
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Verilog Verification (gate level)
SCENERIO diver goes 80 feet for 35 min, 40 feet
for 20 min, 0 feet for 40 min
MATLAB depthvector 80ones(1,6035)
40ones(1,6020) 0ones(1,6040) bodyvector,out
pressurecalculator(depthvector) bodyvector(603
5) ans 25.5304 bodyvector(6055) ans
28.3850 bodyvector(6095) ans 18.2900
VERILOG time 2,safetywatch
0 Test where the user will go down to 80 feet for
35 minutes, then 40 feet for 20 minutes, then 0
feet 40 minutes time
6090,safetywatch 1 time
6305,pres25,depth 80 time
9054,safetywatch 2 time
9908,pres28,depth 40 time
10272,safetywatch 1 time
12165,safetywatch 0 time
17110, pres18,depth 0
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Transistor Estimates (last week)

• Get K 80
• Pressure Calculator 5000
• Ascension Watcher 200
• Time to Flight 1500
• 1 Get Max 800
• Time Left 2500
• Bottom Time 1000
• Overhead Control Logic 1500
• TOTAL 12580

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Actual Transistors
MODULE transistors SUBMODULES ( transistors) SUBMODULES ( transistors)
Get K 926 Control logic (68) 3 7-bit comparators (858)
Pressure Calculator 3648 2C to SM conv, 9 ,26 (1162) Multiplier, 8 by 4 (912) Register, 25 bit (400) Subtractor, 9 bit (324) Adder, 25 bit (850)
Safety Watch 656 3 5-bit comparators (642) Control logic (14)
Ascension Watch 1564 6 registers, 8 bit (768) Subtractor, 9 bit (324) Comparator 8 bit (322) 2C -gt SM conversion, 9 bit (144) Control logic (6)
Bottom Time 1852 Registers, 8 bit and 17 bit (400) 3 8 bit subtractors (864) Addone 4 bit, 17 bit (294) Comparator 5 bit (214) Control logic (80)
Time to Flight 1836 ROM (64), demux (308) Register, 17 bit (272) Minus1, 17 bit (272) GetMax, 17 bit (920)
Max Depth 596 Register, 8 bit (128) GetMax, 8 bit (468)
Time Left 2026 Register, 8 bit x 2(256) subtractor, 8 bit x 2 (576) ROM (160), demux (724) Control logic- muxes (310)
TOTAL 13104
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Realistic Area Estimates
Module Dimensions Total Area (?m2)
Get K 64 x 80 5120
Pressure Calculator 188 x 120 22560
Safety Watch 80 x 48 3840
Ascension Watch 144 x 80 11520
Bottom Time 156 x 76 11856
Time to Flight 134 x 67.5 9045
Max Depth 48 x 64 2560
Time Left 108 x 96 10368
76869 ?m2 total for modules
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Floorplans Size Estimates
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Floorplans Individual Modules
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Floorplans Individual Modules
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Floorplans Individual Modules
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Floorplans Individual Modules
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Floorplans Individual Modules
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Floorplan Whole Thing
Total Size 92,160 microns square
.092 mm2 Overall density
(w/o routing) 76869/
92160 83 Aspect Ratio
320/288 1.111111
?
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Wiring Conventions

• Metal 1 to be used to wire small components
  horizontally
• Metal 2 to be used to wire small components
  vertically
• Metal 3 Interconnect for bigger modules
• Metal 4 Overall Interconnect (when M3 cant be
  used)