Virtual Wallet Structure Proposal

Virtual WalletStructure Proposal

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

• September 28, 2009

StatusFinished• Flow Chart• Behavioral Verilog• Transistor Estimate • Floor Plan• Structure Proposal

To Do • Schematic• Structural Verilog• Layout• Testing

An

Bn

Cn-1

Gn Pn

Sn

Cn

1

1

n n n

n n n

n n n

n n n n

P A B

G A B

S P C

C P C G

Adder

FA

A0 B0

S0

Co,0FA

A1 B1

S1

Co,1FA

A28 B28

S28

Co,28FA

A29 B29

S29

Co,29……

Ci,0

Subtractor

*1

* * *1 1

n n n n

n n n n n n n

D A B C

C A B A C B C

C*n-1

An

Bn

C*n

Dn

Q

QSET

CLR

D

Q

QSET

CLR

D

Q

QSET

CLR

D

Q

QSET

CLR

D

clock

input…Q9 Q8 Q1 Q0

Left shift

Multiply

clock

input … Q9Q8Q1Q0

Q

QSET

CLR

D

Q

QSET

CLR

D

Q

QSET

CLR

D

Q

QSET

CLR

D

Right shift

Divide

D

CP

Q─ Q

D Flip-flop

Comparator

Relation Comparator

A BA B

A BA BA BA B

Z

ZC Z

C

C

C Z

+B29

A29

+B28

A28

+B1

A1

+B0

A0

… ZA=B

A≥B

A≤B

C

N

Initial

Connect to SecureOne

Select Account

Input FSM

Start Shopping

Don’t input budget

Set budget to max in account

Check account

Input Budget

Not enough in account

Display error

Enough in account

Budget stored in memory

S0

S1

S2 S3

0/0

1/0

1/10/0

1/1

0/0

1/1

0/1

Next State Output

0 1 0 1

S0 S0 S1 0 0

S1 S2 S3 0 1

S2 S0 S3 0 1

S3 S3 S3 1 1

Current StateInput xn

Next StateOutput

znAn Bn An+1 Bn+1

0 00 0 0 0

1 1 1 0

1 10 0 1 0

1 1 0 1

0 10 0 0 0

1 1 0 1

1 00 1 0 1

1 1 0 1

Q

QSET

CLR

D

Q

QSET

CLR

Dclock

B

A

output

input

n n n n nAD x A B x n n n n n n nBD A B x A B x n n n n nz B x A B

B

A

card(s0)

enough(s2)

bug_sel(s1)

(s3)input

Input FSM

S0

S1

S2

S3

00/0

10/001/1

11/000/0

01/1 01/1

10/0 10/0

11/0

Initial

Over

Remove item

Go over

Remove item

Remove item

Check SRAM

Make note in subtractor

Total not over budget

Budget FSM

Don’t go over

Added another item

Make note in subtractor

Total still over budget

CheckoutCheck SecureOne Database.

Pay

Next State Output

00 01 11 10 00 01 11 10

S0 S0 S2 S3 S1 0 1 0 0

S1 φ S2 S3 S1 φ 1 0 0

S2 φ S2 φ φ φ 1 φ φ

S3 S0 φ φ S1 φ φ φ 0

Current state Input xn Next StateOutput

znAn Bn x1n x0

n An+1 Bn+1

0 0

0 0 0 0 0

0 1 0 1 1

1 1 1 1 0

1 0 1 0 0

1 0

0 0 φ φ φ

0 1 1 0 1

1 1 1 1 0

1 0 1 0 0

Current state Input xn Next stateOutput

znAn Bn x1n x0

n An+1 Bn+1

0 1

0 0 φ φ φ

0 1 0 1 1

1 1 φ φ φ

1 0 φ φ φ

1 1

0 0 0 0 0

0 1 φ φ φ

1 1 φ φ φ

1 0 1 0 0

1n n n nAD x A B

0 1 0n n n n nBD A x x x

1 0n n nz x x

Q

QSET

CLR

D

Q

QSET

CLR

D

B

A

clock

outputinputx1

x0

over1(s0)

input(x1)

B

A

input(x0)

(s2)

remove1(s1)

judge1(s3)

over0(s0)

(s2)

remove0(s1)

judge0(s3)

Discount FSM

Initial

Check Database

Check SRAM

Get nothing

Scanned item

discountMake note in subtractor

No discount

S0

S1 S2

0/0

0/0

1/0 0/0

1/1

Next State Output

0 1 0 1

S0 S0 S1 0 0

S1 S0 S2 0 0

S2 S0 φ 1 φ

Current StateInput xn

Next StateOutput

znAn Bn An+1 Bn+1

0 00 0 0 0

1 0 1 0

0 10 0 0 0

1 1 1 0

1 10 0 0 1

φ φ φ φ

Q

QSET

CLR

D

Q

QSET

CLR

D

B

A

output

input

clock

n n nAD B xn nBD xn nz A

B

A

discount(s1)

(s2)

input

get(s0)

Discount FSM

Battery FSM

S0

S1 S2

0/1

0/0

1/0 1/1

1/0

0/0

Good Battery

Low Battery

Battery Good

Battery Low

Battery Low

Battery Charging

When Plugged in Battery Starts Charging and returns to the correct State when unplugged

Next State Output

0 1 0 1

S0 S0 S1 1 0

S1 S1 S2 0 0

S2 S2 S0 0 1

Current StateInput xn

Next StateOutput

znAn Bn An+1 Bn+1

0 00 0 0 1

1 0 1 0

0 10 0 1 0

1 1 1 0

1 10 1 1 0

1 0 0 1

Q

QSET

CLR

D

Q

QSET

CLR

D

B

A

clock

output

input

n n n n n nAD A x A B x n n n n nBD B x A x n n n n nz B x A x

B

A

charging(s1)

charged(s2)

input

low(s0)

Battery FSM

Controllerin_state Ain_state B

budg_state A

budg_state B

disc_state A

disc_state B

over warning

price

add_price sub_price

demux

Controller

Transistor Count (new)Block Transistor

SRAM 5000

Adder 720 (500)

Subtractor 780 (500)

Multiply 260 (500)

Divide 260 (500)

Comparator 900 (500)

Logic 600 (2000)

Budget Register 360 (120)

Total Register 360 (120)

Total 9240(9740)