Digital Signal Processors (DSPs) Reverse Engineering
What is a DSP?
Digital Signal Processors (DSPs) take real-world signals like voice, audio, video, temperature, pressure, or position that have been digitized and then mathematically manipulate them. A DSP is designed for performing mathematical functions like "add", "subtract", "multiply" and "divide" very quickly.
Signals need to be processed so that the information that they contain can be displayed, analyzed, or converted to another type of signal that may be of use. In the real-world, analog products detect signals such as sound, light, temperature or pressure and manipulate them. Converters such as an Analog-to-Digital converter then take the real-world signal and turn it into the digital format of 1's and 0's. From here, the DSP takes over by capturing the digitized information and processing it. It then feeds the digitized information back for use in the real world. It does this in one of two ways, either digitally or in an analog format by going through a Digital-to-Analog converter. All of this occurs at very high speeds.
To illustrate this concept, the diagram below shows how a DSP is used in an MP3 audio player. During the recording phase, analog audio is input through a receiver or other source. This analog signal is then converted to a digital signal by an analog-to-digital converter and passed to the DSP. The DSP performs the MP3 encoding and saves the file to memory. During the playback phase, the file is taken from memory, decoded by the DSP and then converted back to an analog signal through the digital-to-analog converter so it can be output through the speaker system. In a more complex example, the DSP would perform other functions such as volume control, equalization and user interface.
A DSP's information can be used by a computer to control such things as security, telephone, home theater systems, and video compression. Signals may be compressed so that they can be transmitted quickly and more efficiently from one place to another (e.g. teleconferencing can transmit speech and video via telephone lines). Signals may also be enhanced or manipulated to improve their quality or provide information that is not sensed by humans (e.g. echo cancellation for cell phones or computer-enhanced medical images). Although real-world signals can be processed in their analog form, processing signals digitally provides the advantages of high speed and accuracy.
Because it's programmable, a DSP can be used in a wide variety of applications. You can create your own software or use software provided by ADI and its third parties to design a DSP solution for an application.
For more detailed information about the advantages of using DSPs to process real-world signals, please read Part 1of the article from Analog Dialogue titled: Why Use DSP? Digital Signal Processing 101- An Introductory Course in DSP System Design.
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dsPIC30F1010# dsPIC30F2010 dsPIC30F2011 dsPIC30F2012 dsPIC30F2020 dsPIC30F2023 dsPIC30F3010 dsPIC30F3011 dsPIC30F3012 dsPIC30F3013 dsPIC30F3014 dsPIC30F4011 dsPIC30F4012 dsPIC30F4013 dsPIC30F5011 dsPIC30F5013 dsPIC30F5015 dsPIC30F5016 dsPIC30F6010 dsPIC30F6010A dsPIC30F6011 dsPIC30F6011A dsPIC30F6012 dsPIC30F6012A dsPIC30F6013 dsPIC30F6013A dsPIC30F6014 dsPIC30F6014A dsPIC30F6015
dsPIC33FJ128GP206 dsPIC33FJ128GP306 dsPIC33FJ128GP310 dsPIC33FJ128GP706 dsPIC33FJ128GP708 dsPIC33FJ128GP710 dsPIC33FJ128MC506 dsPIC33FJ128MC510 dsPIC33FJ128MC706 dsPIC33FJ128MC708 dsPIC33FJ128MC710 dsPIC33FJ12GP202 dsPIC33FJ12MC201 dsPIC33FJ12MC202 dsPIC33FJ16GP304 dsPIC33FJ16MC304 dsPIC33FJ256GP506 dsPIC33FJ256GP510 dsPIC33FJ256GP710 dsPIC33FJ256MC510 dsPIC33FJ256MC710 dsPIC33FJ32GP202 dsPIC33FJ32GP204 dsPIC33FJ32MC202 dsPIC33FJ32MC204 dsPIC33FJ64GP306 dsPIC33FJ64GP206 dsPIC33FJ64GP310 dsPIC33FJ64GP706 dsPIC33FJ64GP708 dsPIC33FJ64GP710 dsPIC33FJ64MC506 dsPIC33FJ64MC508 dsPIC33FJ64MC510 dsPIC33FJ64MC706 dsPIC33FJ64MC710
TMS320F206 TMS320F243 TMS320F240 TMS320F241
TMS320LF2407 TMS320LF2403A TMS320LF2402A TMS320LF2407A
TMS320LF2406A TMS320LF2401A TMS320LF2406 TMS320LF2402