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