Virtual WalletSimulation and Waveforms

To create a handheld device which will save money and time through budget assistance and improve the shopping experience.

• Gates Winkler • Jordan Samuel Fei• Yin Shen

• October 26 , 2009

Status

Finished• Flow Chart• Behavioral Verilog• Transistor Estimate • Floor Plan• Structure Proposal• Structural Verilog• Schematic• SimulationTo Do • Layout• Testing

inv

nand

and

nor

or

3nand

xor

1bit full adder

A B Ci Co S0 0 0 0 00 0 1 0 10 1 0 0 10 1 1 1 01 0 0 0 11 0 1 1 01 1 0 1 01 1 1 1 1

1bit full adder

adder

adderSome examples595759104+891=595759995100011100000101001000000000000+1101111011=100011100000101001001101111011

118624453+130192448=248816901000111000100100001000011000101+000111110000101001010001000000=001110110101001010010100000101

1bit full subtractor

A B Ci S Co0 0 0 0 0 0-0-0 = 0, No borrow0 0 1 1 1 0-0-1 = -1, borrow 2, so: 2-1 = 10 1 0 0 1 1-0-0 = 1, No borrow0 1 1 0 0 1-0-1 = 0, No borrow1 0 0 1 1 0-1-0 = -1 (bin=1), borrow 2, so: 2-1 = 11 0 1 1 0 0-1-1 = -2 , borrow 2, so: 2-2=01 1 0 0 0 1-1-0 = 0, No borrow1 1 1 1 1 1-1-1 = -1, borrow 2, so: 2-1 =1

1bit full subtractor

subtractor

subtractorSome examples595759104-891:595758213100011100000101001000000000000-1101111011=100011100000101000110010000101

118624453-11567995:107056458000111000100100001000011000101-000000101100001000001101111011=000110011000011000110101001010

Flipflop

multiply

divide

Binary - BCD

Test 1

• Binary• 10000100001000010000 • Decimal• 541200• BCD• 0000 0101 0100 0001 0010 0000 0000

•0 (0000)

•0 (0000)

•2 (0010)

•1 (0001)

•4 (0100)

•5 (0101)

•0 (0000)

Test 1

• Binary• 11110100001001000000 • Decimal• 1000000• BCD• 0001 0000 0000 0000 0000 0000 0000

BCD - Binary

Test 1

• Decimal• 834943• BCD• 0000 1000 0011 0100 1001 1000 0011• Binary• 11001011110101111111

01111111

10111101

1100

Test 1

• Decimal• 834943• BCD• 0000 1000 0011 0100 1001 1000 0011• Binary• 11001011110101111111

Binary - BCD

Test 1

• Binary• 10000100001000010000 • Decimal• 541200• BCD• 0000 0101 0100 0001 0010 0000 0000

•0 (0000)

•0 (0000)

•2 (0010)

•1 (0001)

•4 (0100)

•5 (0101)

•0 (0000)

Test 1

• Binary• 11110100001001000000 • Decimal• 1000000• BCD• 0001 0000 0000 0000 0000 0000 0000

BCD - Binary

Test 1

• Decimal• 834943• BCD• 0000 1000 0011 0100 1001 1000 0011• Binary• 11001011110101111111

01111111

10111101

1100

Test 1

• Decimal• 834943• BCD• 0000 1000 0011 0100 1001 1000 0011• Binary• 11001011110101111111