Processor used for upgrading 16bit to 32bit DSP processor

32bit DSP processor

I want to upgrade my board from 16bit DSP (ADSP2189 - Analog Devices) to 32bit DSP. Do you have any suggestions: which processor should I use?
In my application power consumption is essential. Also, I want to read 24bit ADC - so DSP should have serial port capable to receiving 24bit data.

Thanks in advance for any suggestions.

32bit DSP processor

Do you think "TMS320C6711" DSP from TI suits your application?

TMS320C6711
- 32 bit Floating Point

Two Multichannel Buffered Serial Ports (McBSPs)
* Direct Interface to T1/E1, MVIP, SCSA Framers
* ST-Bus-Switching Compatible
* Up to 256 Channels Each
* AC97-Compatible
* Serial-Peripheral-Interface (SPI) Compatible (Motorola™)

Re: 32bit DSP processor

Thanks for the fast answer.

This is very good processor.
But there is a few limitations:
First, power consumption is very high.
Second - I have no technology to mount BGA packages....

Any other suggestions?

Re: 32bit DSP processor

I got the answer that you need:

Go for a SHARC. Recommended parts: ADSP-21065L, ADSP-21262. First one is SISD, 198 MFLOPS. Second is SIMD,, 600 MFLOPs. First includes SDRAM controller, second includes parallel port. First has 2 x 2chann SPORTs, full-duplex. Second has 6 serial ports (SPORTs)!!!! First has 0.5Mbit onchip SRAM, second has 1Mbit onchip SRAM + 3 Mbit maskable ROM (if your design goes in big quantities). Prices are around US$30 in unit quantities at Digikey. Both are avalable in QFP packages, which although surface mount, they are not BGA. so I think you can work with them easily. Both have EzKits availables, part numbers are ADDS-21065L-EZLITE and ADDS-21262S-EZLITE. Free samples are available from ADI's website, for both parts.

Ah, and SPORTs on both SHARCs support several channels of up to 32bit data.

Keep in mind that power consumption is always higher with 32 parts, even worse, with floating point processors, compared to 16bit, fixed point processors. But I am pretty sure that power cosumption is far lower with SHARCs than with C67xx's

Get bitten by the SHARC is exactly what you need!!!

JaaC

Re: 32bit DSP processor

If you used 16bit DSP fixed point (ADSP2189 - Analog Devices) try ADSP-2153x BlackFin. It's fixed point processor to and has a freq > 600MH. And it's cheap, look for AD local vendor for price. And don't use ADSP-219x. This processor has no future.

Re: 32bit DSP processor

Good recommendation. However, look at how important could it be to have NATIVE support for floating point processing, if you need to.

With Blackfin you still can do some NATIVE 32 bit processing in fixed point format, or 1.32 fractional format.

JaaC

Re: 32bit DSP processor

How about Freescale (Motorola) 24bit processors?
Anyone use that chips?

32bit DSP processor

They are fine... but too old, not good roadmap... and beware of processing 24 bit data on a 24 bit processor, fixed point!