Peripherals and their Control An overview of industrially available

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Peripherals and their ControlAn overview of
industrially available peripheral devices

• Some ideas for Laboratories and Quiz / Exam
  questions

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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
• TSL230R Light sensor Lab. 2
• 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?

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MMA6260QDual Axis Accelerometer Analog Output
Left Channel ? Right Channel?

• Could we modify the Talk-through program from
  Lab. 1 to work withthis accelerometer?
• Concern 1 voltage levels too high voltages
  would destroy 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

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MMA6260Q

• How doesit work?

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MMA6260Q Dual Axis AccelerometerUsed as tilt
sensor static mode
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MXPM2010 Pressure sensor
Differential pairoutput How connect to
Blackfin A/D which canthandle differential
voltages? Convert tosingle sided signalvia
op-ampand then connect?
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33794 Electric Field Sensor-- Uses ISO-9141
dual-wire protocol
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ISO-9141

• Road vehicles diagnostic systems
• Requirements for exchange of digital information
• Can be converted to RS-232 via a chip

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Possible application
PAD 1
Detect If Your Drink Has Been moved
PAD 2
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SPI interface chips -- Used during Lab. 4.

• Ability to send data over 1 line
• Master Out Slave In MOSI (Master sends, slave
  receives)
• Ability to receive data over 1 line
• Master In Slave Out MISO(Slave sends, master
  receives
• Control many devices. Each devices is told to
  listen using a chip-select (CS) line
• Can use PF1, PF2 PF7
• PF0 line can be used to switch Blackfin into a
  slave mode (Two Blackfins talking to each other)

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Master / Slave conceptSlave Select (Chip Select)

• Blackfin master sends out active low chip select
  signal SS1, then slave 1 selected (responds)
• Master sends out active low chip select signal
  SS3, then slave 3 responds

PF5
PF6
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Lab. 4 SPI interface project
SPI signals from Blackfin1 line (MOSI) Clock
PF5 (SSI)
16 output linesused to control LCD screenor the
radio controlled car
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Multiple Switch Detection InterfaceMC33993
Part of security system laboratory
Blackfin MOSICLKPF5MISOPF9PF10?
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MC33993
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MC33993 Timing info Bits value switch On/off
stream of 20 bits
SG13 ON/OFF, SG12 ON/OFF, SG11 ON/OFF ----- SO0
ON/OFF .
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ADIS16003 Uses SPI interfaceDual axis
accelerometer AND Thermometer
CLKPF5 MISO PF6
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ADIS16003 Uses SPI interfaceDual axis
accelerometer AND Thermometer
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ADIS16100 Gryosensor
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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

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ADI TMP03 Serial Digital Output Thermometer
Will use the same ideas in Lab. 3
GROUND WIRE 5VPF11 connection on Blackfin
Interface
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Block diagram for the TMP03
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TMP03 Output characteristics
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More information on the sigma-delta modulator
used to generate TMP03 output
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ADXL213 Dual Axis Accelerometer
PF9 PF8
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ADXL213 Dual Axis Accelerometer
PF9 PF8
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ADXL213 Dual Axis Accelerometer
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ADXL213 Dual Axis AccelerometerOutput when used
as tilt sensor
X 50Y 80
X 50Y 20
X 50Y 50
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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