ECE 477 Reliability & Safety Analysis

1. ECE 477Reliability & Safety Analysis Team 5 – myATM Xue Yuan Wong

2. Overview • Automated Teller Machine (ATM) • Use face recognition technology to verify identity • 4-digit PIN • Read/Write cash card via RFID • Touchpad to navigate user menu • Occupancy sensor to detect user

3. Criticality Levels • High criticality • Failure that could potentially injure or harm the user. • Acceptable failure rate, λ < • Medium criticality • Failure that causes component(s) to damage and therefore not being able to function normally anymore. • Acceptable failure rate, λ <

4. Criticality Levels • Low criticality • Failure that results non-ideal operation of the component and does not harm the user • Acceptable failure rate, λ <

5. Component Analysis • Microcontroller (Microchip PIC18F24J11) • Complex architecture • Perform various tasks (eg: sample keypad buttons, occupancy sensor, RFID data, control modulation) • Switching regulators (TI LM2675-3.3/5.0) • Handles large amount of current

6. Component Analysis • RFID read/write base station (Atmel U2270B) • Has 16 pins. Multiple modules inside the chip. • On-chip power supply circuit • Antenna driver circuit • Frequency generator • Signal processing circuit (modulation/demodulation) • Fast switching signals. Generate heat easily.

10. Section A - Power Supply Block

11. Section B - Microcontroller Block (1)

12. Section B - Microcontroller Block (2)

13. Section C – RFID Block

14. FMECA Chart Section A – Power Supply Block

15. FMECA Chart Section B – Microcontroller Block

16. FMECA Chart Section B – Microcontroller Block

17. FMECA Chart Section C – RFID Block

18. FMECA Chart Section C – RFID Block

19. Question