Group M3Jacob ThomasNick MarwahaDarren ShultzCraig LeVanProject Manager: Zachary Menegakis February 2,2005

MILESTONE 3 Size estimates/Floorplan

DSP 'Swiss Army Knife'

Overall Project Objective: General purpose Digital Signal Processing chip

STATUS

Design Proposal (Done) Architecture (Done) Size Estimates/Floorplan/Verilog (90%) To Be Done

Structural Verilog Reengineering• Control Logic

• Low-Level Modules Schematic Verification

MARKETING UPDATE

How Does Our Circuit Fit Into the Bigger Picture? Focus on Audio/Video Applications

Audio:• Digital Radios / MP3 Players (i.e. Motorola, Lucent, Texas

Instruments)• Digital Music Synthesis / Sampling (i.e. Yamaha, Korg)• Noise Reduction (i.e. Dolby)

Video:• Comb Filter to separate color and brightness (i.e. Sony, Toshiba)

Others: Motor Control Functions such as RPM (i.e. Ford, GE)

MARKETING UPDATE cont

Highlighted Areas Contain Many Instances of our Circuit

Key Functions used: Integrators and Filters

REUSE!!!!

MARKETING UPDATE cont

A Moving Averager Smoothes a Signal to Reduce Noise

DESIGN DECISIONS

Finalized bit-width to 12-bit floating point Based on CMU Research in Voice Recognition

• Complexity => Our Applications in Audio and Video 6-bit exponent, 5-bit fraction

• Additional Precision cannot be discerned by humans Reduces Power Consumption

• Increased bit-width does not add to quality/versatility• Chip Applications would benefit from low power consumption

Size offers advantages of parallel processing to increase speed• Serial (software) vs. Parallel (hardware) operations

DESIGN DECISIONS cont

DESIGN DECISIONS contName a0 a1 a2 b0 b1 b2 c1 N

1 Differencer 1 0 0 1 -1 0 0 x

2 Integrator 1 1 0 1 0 0 0 x

3 Leaky Integrator 1 1 0 1 0 0 0 x

4 Comb Filter 1 0 0 1 0 0 1 8

5 Bandpass Filter 1 0 -1 1 0 0 1 16

6 CIC Interpolation Filter 1 1 0 1 0 0 1 8

7 dc Bias Removal 1 a.b 0 1 -1 0 0 x

8 First-Order Equalizer 1 a.b 0 a.b 1 0 0 x

9 Audio Comb 1 0 a.b 1 0 0 0 x

10 Moving Averager 1 1 0 1/N 0 0 1 8

11 Second-Order IIR Filter 1 a.bbb a.bbb a.bbbb a.bbb a.bbb 0 x

12 First-Order Delay Network 1 a.bbb a.bbb a.bbb a.bbb 1 0 x

13 Second-Order Delay Network 1 a.bbb a.bbb a.bbb a.bbb 1 0 x

14 Real Oscillator 1 2cos(x) -1 1 0 -1 x x

15 Second-Order Equalizer 1 (a.b*cos(x) a.b 1 a.b*cos(x) 1/a.b 0 x

16 Real FSF, Type I 1 2cos(x) -1 ?*cos(x) ?*cos(x) 0 1 x/2*pi*k

17 Real FSF, Type IV 1 2cos(x) -1 ?*1 0 ?*1 1 x/2*pi*k

18 Complex FSF 1 imag 0 1 0 0 1 x/2*pi*k

19 Quadrature Oscillator G(n) imag 0 1 0 0 x x

20 First-Order IIR Filter 1 imag 0 1 imag 0 0 x

21 Goertzel Network 1 2cos(x) -1 1 imag 0 0 x/2*pi*k

22 Sliding DFT Network imag 1 0 1 0 0 r^N x/2*pi*k

FLOORPLAN

Each block is approximately 100 * 100 with the exception of the possibly larger comb filter

FLOORPLAN alternative

POROSITY

STOLEN FROM W1 2004 (Thanks Myron & Bobby)

SIZE ESTIMATES

Adder: 5 * (200 + 200 + 100) = 2500

Mult: 7 * (900+200) = 8000

Div: 2 * (1000 + 200) = 2400

Fmult: 1 * (1200) = 1,200

Misc: (700 + 250) = 2,000

Registers: 83 * ~22 = 1,900

18,000 transistors

VERILOG

PROBLEMS & QUESTIONS

Determine Bit Width Floorplan – Minimize Comb Filter or use

Alternative? Should Focus Be Area or Global Routing?

Structural Verilog Fix Control Logic within Basic Blocks