Washing Machine Solutions

1. Affordable Intelligent Motion Washing Machine Solutions SenseTile Hardware Design Review 1 CASL, UCD, 12 December 2008 Confidential mSemicon & UCD

2. Agenda • Current status of design work • Description of design • Extra features • Dimensions • Schedule Confidential mSemicon & UCD

3. Current Status of Design Work • Schematic has been completed about 99% • All on-board electronic components selected • Only issue remaining relates to selection of connectors • Some other minor issues • Some feedback required on mechanical issues • Following today’s review, layout is expected to begin immediately Confidential mSemicon & UCD

4. General Description of Design • The schematic is divided into eight separate sheets describing: • CODEC / ADC circuit • FPGA circuit • Audio and ultrasonic inputs • Audio input circuitry (Input 1) • General input circuitry (Input 2) • Microcontroller circuitry • Output circuitry • Power supply circuitry • (Prior USB circuitry, to be removed) • New USB circuitry Confidential mSemicon & UCD

5. CODEC / ADC • Design based on two devices: • ADC for simultaneous sampling (for non-audio applications) • ADS1174/8 • For slowly changing signals: DC to 4kHz sampling • Four channel • CODEC • AD1937 • Very high performance: high speed • Built-in audio filters • Extremely low noise Confidential mSemicon & UCD

6. FPGA • Design based on Xilinx XC3S250 (Spartan) • General purpose FPGA • Configuration by: • JTAG (during development) • SPI (direct, during test and development); • SPI can be directly updated by USB (i.e. not through the microcontroller) on deployment Confidential mSemicon & UCD

7. Audio Input Circuitry – Input 1 • Catering for audio range (2) and ultrasonic range (2) • Number of total usable inputs depends on sample rate • Extremely low noise amplifiers Confidential mSemicon & UCD

8. General Input Circuitry - Input 2 • Catering for general inputs from sensors and switches • Four analogue inputs • Eight digital I/O • User configurable via microcontroller Confidential mSemicon & UCD

9. Microcontroller Circuit • Based on STM32F103V9 Cortex device from ST • Latest generation Cortex ARM processor • Built in RAM/Flash • Multifunction I/O • JTAG programmable in-circuit debugger • RS 232 debug port, allowing external programming of micro flash • GSM port Confidential mSemicon & UCD

10. Output Circuitry • Drivers for speakers • Audio • Ultrasonic • On board relays (2) • IR LED drivers (shown on FPGA sheet) • IR detection to be added Confidential mSemicon & UCD

11. Power Supply • Works on 12-30Vdc in • Generated on board: 1.2V, 2.5V (linear), 3.3V x 2, 5V, -11V, +11V • Point of load power supply design • FPGA powered separately • Analogue circuitry powered separately • Microcontroller can operate on its own • Current sensor on board, monitoring total current consumption • Information processed by microcontroller Confidential mSemicon & UCD

12. (Prior USB Design) • Until last few weeks, USB was run on a MCS7840 • Four channel UART to USB device • Satisfied requirements, but • Heavy load on FPGA • Mandated FPGA programming indirectly • A new device is becoming available now, and will be used instead Confidential mSemicon & UCD

13. New USB Ciruitry • FTDI USB-high speed data port • A new electronic device is being sampled at the moment, and will enter production “in March 2009” which, on board, would allow: • Direct programming of the SPI • Direct access to generalised I/O • CPU high-speed parallel bus interface (asynchronous) • Four fold (+) increase in performance • Host can talk directly to the FPGA via file transfer Confidential mSemicon & UCD

14. Extra Features • Adding a port for a display: • Considering making provision for LCD display • This enables easier autonomous use of device • Display itself not installed on boards • Other features being considered and, if possible, included Confidential mSemicon & UCD

15. Current Draft Connector Requirements Confidential mSemicon & UCD

16. Connectors – Sensor Inputs • The selection of connectors influences overall board size • Try to be as compact as possible • Another requirement is that special mating connectors should not be necessary – for R&D work • A suitable connector style is the DIN 45326 • Can take up to 8 wires in one unit • Suitable for sensor inputs • Rotates and locks into position • Wires can be soldered onto mating part • This type proposed for simultaneous inputs Confidential mSemicon & UCD

17. Connectors – Power • Board uses 12Vin, but also supplies 12Vout to feed Processor Unit • Requires compact multi-pole solution • Needs to be robust, and not subject to loosening due to vibration • Needs to snap into position • Propose Mini-Fit Jr™ 5569 from Molex • Or equivalent from Würth Confidential mSemicon & UCD

18. Audio I/O – Audible and Ultrasonic • Both pairs of microphones will be installed on daughterboard(s) • “Both” meaning audible and ultrasonic • Main board will be upside-down • Daughterboard will be suspended underneath • The relative orientation of daughter-boards, if two, has to be decided • Alternative could be a small single board with four microphones, pairs mounted at extremities Confidential mSemicon & UCD

19. Dimensions • Circuit board layout not started yet • Connectors have a very important bearing on overall size • Issue to be settled • Orientation of PIR sensor and microphone daughterboard important • Propose DIN style for general inputs • Can accommodate 4 pairs each • Dimensions are expect to be in the range of 120mm x 170mm Confidential mSemicon & UCD

20. Near-term Schedule • Layout to begin 15/12/08 • Scheduled to finish late January • Bare boards available first week of February • Will be built up and debugged gradually • HW: PS, processor, ... • SW: Linux USB driver (SPI & CPU bus), FPGA VHDL (in progress), Micro board support • Best case scenario is 6 weeks after board arrives for first sample • With partial driver and board support package functionality • Likely scenario is 9 weeks after board arrives for first sample Confidential mSemicon & UCD