1. Peripherals and their Control An overview of industrially available “peripheral devices” Some ideas for Laboratories and Quiz / Exam questions

2. To be tackled today Analog Output Devices –These could be handled via A/D as we did with an audio signal in Lab. 1. Depends on amplitude and frequency of the signals generated by the devices. SPI devices – Tackled in Lab. 4 –LCD screen using a serial parallel converter –MC33993 Multiple -- Switch Detection Interface –ADIS16003 accelerometer and temperature sensor Digital Output – modulated pulse width –Handle with PF interface as with switches –ADI - TMP03 thermometer – Lab. 3 –ADXL213 Dual Axis Accelerometer – Done in lecture Those interested – might be able to work out special Lab. 3 substitute – Four times the fun – eight times the work?

3. MMA6260Q Dual Axis Accelerometer Left Channel ? Right Channel? Could we modify the “Talk-through program from Lab. 1 to work with this accelerometer? Concern 1 – voltage levels – can’t blow Blackfin A/D Concern 2 – is the 48 kHz bandwidth of the audio A/D enough Probable solution – use a non-audio, more general A/D connected via SPI interface

4. MMA6260Q

5. MMA6260Q Dual Axis Accelerometer Used as “tilt” sensor – static mode

6. MXPM2010 – Pressure sensor Differential pair output How connect to A/D? Convert to single sided signal via op-amp and then connect?

7. 33794 – Electric Field Sensor -- Uses ISO-9141 dual-wire protocol

8. ISO-9141 Road vehicles – diagnostic systems Requirements for exchange of digital information Can be converted to RS-232 via a chip

9. Possible application PAD 1 PAD 2 Detect If Your Drink Has Been moved

10. SPI interface chips -- Used during Lab. 4. Ability to send data over 1 line –Master Out Slave In – MOSI Ability to receive data over 1 line –Master In Slave Out – MISO Control many devices using a chip-select (CS) line –Can use PF1, PF2 …………… PF7 –PF0 line can be used to switch Blackfin into a slave mode

11. Master / Slave concept Slave Select (Chip Select) Master sends out active low chip select signal SS1, then slave 1 responds Master sends out active low chip select signal SS3, then slave 3 responds PF5 PF6

12. Lab. 4 SPI interface project SPI signals from Blackfin 1 line (MOSI) + Clock + PF5 (SSI) 16 output lines used to control LCD screen

13. Multiple Switch Detection Interface MC33993 – Part of security system laboratory Blackfin MOSI CLK PF5 MISO PF9 PF10?

14. MC33993

15. MC33993 – Timing info Bits value = switch On/off – stream of 20 bits SG13 ON/OFF, SG12 ON/OFF, SG11 ON/OFF ----- SO0 ON/OFF ………….

16. ADIS16003 – Uses SPI interface Dual axis accelerometer AND Thermometer CLK PF5 MISO PF6

17. ADIS16003 – Uses SPI interface Dual axis accelerometer AND Thermometer

18. ADIS16100 – Gryosensor

19. Serial Digital Output Analog values – say temperatures from minus 40C to plus 100 measured Value converted into “pulse length information” – digital signal Transmitted over a single wire

20. ADI – TMP03 Serial Digital Output Thermometer GROUND WIRE +5V PF8 connection on Blackfin Interface

21. Block diagram for the TMP03

22. TMP03 Output characteristics

23. More information on the sigma-delta modulator used to generate TMP03 output

24. ADXL213 Dual Axis Accelerometer PF9 PF8

25. ADXL213 Dual Axis Accelerometer PF9 PF8

26. ADXL213 Dual Axis Accelerometer

27. ADXL213 Dual Axis Accelerometer Output when used as “tilt sensor” X 50% Y 50% X 50% Y 80% X 50% Y 20%

28. Reference Information Pictures are taken from various data sheets available from the Analog Devices and Freescale (Motorola) web sites Proposed use of devices are for concept purposes only and no guarantee is made regarding suitable of circuits suggested Application notes are also available on the website