(Left to Right) Matt Finn Brian Crone Samuel Oshin Yonatan Feleke

 Future Cash Register The future cash register is a point of sale box designed to make wireless transactions through the use of Near Field Communications protocol. It will accept payments and send receipts through NFC. It will also aide the cashier with orders through voice recognition.

 Ability to customize the inventory via the user interface (Atom)  Ability to communicate with an NFC device (dSPIC30)  Ability to interface with an IR sensor to detect the presence of a user (dSPIC30)  Ability to display prompts to user through LCD (dSPIC30)  Ability to aid cashier by highlighting menu choices while placing order with voice recognition (Atom)

 High System irreparable Potential for user injury  Medium System irreparable Little/no potential for user injury  Low System still functional User inconvenience

 Voltage Regulator  RS232 Level Translator  Microcontroller  NFC Controller

 C 1 =.02 (101 to 300 transistors)  π T = 16.0 (<100˚C)  C 2 = (3 pins)  π E = 2.0 (Ground fixed environment)  π L = 1.0 ( > 2 years)  π Q = 10.0 (Commercial Grade)  λ P = (C 1 x π T + C 2 x π E ) x π L x π Q = failures/10 6 hours

Failure No.Failure Mode Possible Causes Failure Effects Method of Detection Criticality Voltage Regulator A1Output = 0VFailure of regulator or passive components, external short Unable to operate Observation, package heating up, no response from micro to GUI Medium A2Output > 5VRegulator Failure Component destruction, Overheating ObservationHigh A3Output out of tolerance Regulator, Passive Component Failure Operating voltages wrong, unpredictable Observation, voltage probes Medium

 C 1 =.02 (101 to 300 transistors)  π T = 7.0 (<85˚C)  C 2 = (16 pins)  π E = 2.0 (Ground fixed environment)  π L = 1.0 ( > 2 years)  π Q = 10.0 (Commercial Grade)  λ P = (C 1 x π T + C 2 x π E ) x π L x π Q = failures/10 6 hours

Failure No.Failure Mode Possible Causes Failure Effects Method of Detection Criticality RS232 Translator B1Output = 0VFailure of translator or passive components, external short Atom and Micro unable to communicate Observation, No messages from micro Medium B2Output not translated MAX3232 Failure Atom and Micro unable to communicate, high voltage to Micro Observation, Voltage probes, no messages from micro Medium

 C 1 =.28 (16-bit, MOS)  π T = 3.1 (125˚C)  C 2 = (64 pins)  π E = 2.0 (Ground fixed environment)  π L = 1.0 ( > 2 years)  π Q = 10.0 (Commercial Grade)  λ P = (C 1 x π T + C 2 x π E ) x π L x π Q = 9.32 failures/10 6 hours

Failure No.Failure Mode Possible Causes Failure Effects Method of Detection Criticality Microcontroller D1Output continuously 0 Software, Passive Components, Short System not functional, blocks not communicatin g Observation, Software debugging, probes Medium D2Output continuously 1 Software, Passive components Improper communicatio n between blocks, no real functionality Observation, check LEDs and messages on GUI Medium

 C 1 =.14 (8-bit, MOS)  π T =.96 (85˚C)  C 2 = (40 pins)  π E = 2.0 (Ground fixed environment)  π L = 1.0 ( > 2 years)  π Q = 10.0 (Commercial Grade)  λ P = (C 1 x π T + C 2 x π E ) x π L x π Q = failures/10 6 hours

Failure No.Failure Mode Possible Causes Failure Effects Method of Detection Criticality NFC Controller D1Output continuously 0 Oscillator Failure, Passive Components, Short NFC data will not be sent/received. Payment not possible Observation, correct payment information not received Low D2Incorrect operating frequency Oscillator failure Improper data communicatio n, potential for losing data, incorrect payment information Observation, Verify payment information with receipt Low