Read e-book online Analog Interfacing to Embedded Microprocessor Systems. Real PDF

By Stuart Ball

ISBN-10: 0750677236

ISBN-13: 9780750677233

  • Provides hard-to-find info on interfacing analog units and applied sciences to the in basic terms electronic global of embedded microprocessors. supplies the reader the perception and viewpoint of a true embedded structures layout engineer, together with counsel that just a hands-on specialist might understand. Covers very important issues for either and software program systmes whilst linking analog and electronic units. -Embedded expertise ...a accomplished resource on interfacing the genuine global to microprocessors should still end up worthwhile to embedded platforms engineers, scholars, technicians, and hobbyists. somebody fascinated about connecting the analog atmosphere to their electronic machines, or troubleshooting such connections will locate this e-book particularly beneficial. - Embedded know-how more often than not, for all of the sections, there are many basic diagrams and likewise the mathematics is saved to an easy point. ...I like this booklet and suggest it as an creation to the topic for domestic use, scholars and SW Engineers. - Chris Hills within the ACCU journal CVu ...there are lots of basic diagrams and in addition the math is stored to an easy point. i love this publication and suggest it as an creation to the topic for domestic use, scholars and engineers. -Chris Hills within the ACCU journal CVu


, Page ix

, Page xi
1 - approach Design

, Pages 1-12
2 - Analog-to-Digital Converters

, Pages 13-46
3 - Sensors

, Pages 47-90
4 - Time-Based Measurements

, Pages 91-106
5 - Output keep watch over Methods

, Pages 107-143
6 - Solenoids, Relays, and different Analog Outputs

, Pages 145-169
7 - Motors

, Pages 171-213
8 - Electromagnetic Interference

, Pages 215-223
9 - High-Precision Applications

, Pages 225-241
10 - normal Interfaces

, Pages 243-246
11 - Analog Toolbox

, Pages 247-273
Appendix A - Opamp Basics

, Pages 275-286
Appendix B - Pulse Width Modulation

, Pages 287-297
Appendix C - precious URLs

, Pages 299-300
Appendix D - Python Code for bankruptcy eleven; Excel info for bankruptcy 4

, Pages 301-306

, Pages 307-309

, Pages 311-322

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Extra resources for Analog Interfacing to Embedded Microprocessor Systems. Real World Design

Example text

Finally, it is possible to generate an i n t e r r u p t to the microcontroller when the ADC conversion is complete. 15, from the MAX1242 D O U T pin to an i n t e r r u p t on the microcontroller. W h e n - C S is low and the conversion is completed, D O U T will go high, i n t e r r u p t i n g the microcontroller. T o use this method, the firmware must disable or otherwise ignore the i n t e r r u p t except when a conversion is in process. Another ADC with an SPI-compatible interface is the Analog Devices AD7823.

25~S transferring each bit. This may be impractical if the processor has any other tasks to perform, so you may want to use an ADC with a parallel interface or choose a processor with h a r d w a r e support for the SPI. As mentioned in Chapter 1, the bandwidth of the bus must be considered as well as the t h r o u g h p u t of the processor. If there are multiple devices on the SPI bus, then you have to be sure the bus can support the total t h r o u g h p u t required of all the devices. Of course, the processor has to keep up with the overall data rate as well.

Thermistors A thermistor is a temperature-sensitive resistor. Most thermistors have a negative t e m p e r a t u r e coefficient (NTC), m e a n i n g that the resistance goes up as the temperature goes down. Of all passive t e m p e r a t u r e m e a s u r e m e n t sensors, thermistors have the highest sensitivity (resistance change per degree of t e m p e r a t u r e change). T h e r m i s t o r s do not have a linear temperature/resistance curve. T h e r m i s t o r characteristics are d e p e n d e n t on the manufacturing process and materials used.

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Analog Interfacing to Embedded Microprocessor Systems. Real World Design by Stuart Ball

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