World Library  
Flag as Inappropriate
Email this Article

Digital signal controller

Article Id: WHEBN0012060085
Reproduction Date:

Title: Digital signal controller  
Author: World Heritage Encyclopedia
Language: English
Subject: DSPnano RTOS, DSC, Digital signal processing, Freescale Semiconductor, Microprocessor
Collection:
Publisher: World Heritage Encyclopedia
Publication
Date:
 

Digital signal controller

A digital signal controller (DSC) is a hybrid of microcontrollers and digital signal processors (DSPs). Like microcontrollers, DSCs have fast interrupt responses, offer control-oriented peripherals like PWMs and watchdog timers, and are usually programmed using the C programming language, although they can be programmed using the device's native assembly language. On the DSP side, they incorporate features found on most DSPs such as single-cycle multiply–accumulate (MAC) units, barrel shifters, and large accumulators. Not all vendors have adopted the term DSC. The term was first introduced by Microchip Technology in 2002 with the launch of their 6000 series DSCs and subsequently adopted by most, but not all DSC vendors. For example, Infineon and Renesas refer to their DSCs as microcontrollers.)

DSCs are used in a wide range of applications, but the majority go into motor control, power conversion, and sensor processing applications. Currently DSCs are being marketed as green technologies for their potential to reduce power consumption in electric motors and power supplies.

In order of market share, the top three DSC vendors are Texas Instruments, Freescale, and Microchip Technology, according to market research firm Forward Concepts (2007). These three companies dominate the DSC market, with other vendors such as Infineon and Renesas taking a smaller slice of the pie.

DSC chips

NOTE: Data is from 2012 (Microchip and TI) and table currently only includes offering from the top 3 DSC vendors.

Vendor Device Clock Speed (MHz) Flash (kB) PWM channels, resolution, duty cycle
Microchip dsPIC30F 30 6–144 4–8 (16 bits, 1 or 16.5 ns depending on part)
dsPIC33F 40 12–256 up 18 PWM (16 bits, 12.5 ns)
dsPIC33E 70 64-512 up 16 PWM (16 bits, 8.32 ns)
Texas Instruments TMS320F28x 60–150 32–512 16 PWM (13 bits, 150 ps)
TMS320LF240x 40 16–64 7–16 PWM (11 bits, 150 ps)
Freescale MC56F83x 60 48–280 12 PWM (15 bits, 10 ns)
MC56F80x 32 12–64 5–6 PWM (15 bits, 10 ns)
MC56F81x 40 40–572 12 PWM (15 bits, 10 ns)

DSC software

DSCs, like microcontrollers and DSPs, require software support. There are a growing number of software packages that offer the features required by both DSP applications and microcontroller applications. With a broader set of requirements, software solutions are more rare. They require: development tools, DSP libraries, optimization for DSP processing, fast interrupt handling, multi-threading and a tiny footprint.

References

This article was sourced from Creative Commons Attribution-ShareAlike License; additional terms may apply. World Heritage Encyclopedia content is assembled from numerous content providers, Open Access Publishing, and in compliance with The Fair Access to Science and Technology Research Act (FASTR), Wikimedia Foundation, Inc., Public Library of Science, The Encyclopedia of Life, Open Book Publishers (OBP), PubMed, U.S. National Library of Medicine, National Center for Biotechnology Information, U.S. National Library of Medicine, National Institutes of Health (NIH), U.S. Department of Health & Human Services, and USA.gov, which sources content from all federal, state, local, tribal, and territorial government publication portals (.gov, .mil, .edu). Funding for USA.gov and content contributors is made possible from the U.S. Congress, E-Government Act of 2002.
 
Crowd sourced content that is contributed to World Heritage Encyclopedia is peer reviewed and edited by our editorial staff to ensure quality scholarly research articles.
 
By using this site, you agree to the Terms of Use and Privacy Policy. World Heritage Encyclopedia™ is a registered trademark of the World Public Library Association, a non-profit organization.
 


Copyright © World Library Foundation. All rights reserved. eBooks from Project Gutenberg are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.