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At 08:28 AM 12/12/2003, jmi@ded wrote: >YEPP! > >We use 21065L and 21161 too and think of >switching to 21262 because of the BGA issues. > >We use SDRAM with the 065 and SRAM with the 161 >so the "no SRAM" at 262 would not harm our design. > >In the 065 project we use one internal bank and >lot of external SRAM for code execution. Rarely >used code can be redirected to be placed there. >It's a kind of brain squeezer but manageable. > >Beside SDRAM is there any issue not to switch >a new project to 21262 DSPs?? The 21161 has support for multiprocessor configurations. It also has a high speed link port. If you are using a 21161 in a single processor configuration, then the 21262 is a much better choice. It is twice as fast and has much better peripheral support. It is also a lower power device. One limitation however is the parallel port. The parallel port of the 21262 is more limited than the full parallel port of a 21161. It is more difficult to interface and requires external latches. In most 21262 applications this port is not very important We manufacturer boards based on both processors. We expect the 21262 boards to be very popular. > > >Is there a 212XX part imminent with an SDRAM interface, or more > > >generally, does ADI have a low-code floating-point part with SDRAM that > > >*is* within their focus? ADI has announced additional members to this family. The pin outs of these parts are identical although some of the faster parts may not be available in QFP. (In spite of manufacturing issues, there are advantages to BGA with respect to heat dissipation, lead inductance, etc). This also suggests that SDRAM interfacing is not likely. We are looking at pseudo sram solutions for the few cases where you actually need more ram. Al Clark Danville Signal Processing, Inc. -------------------------------- Purveyors of Fine DSP Hardware and other Cool Stuff Available at http://www.danvillesignal.com >Currently run VDSP 2.0 for our 065 project >and VDSP 3.0 for the 161 one. Had no luck >porting the 065 project to 3.0 last time. In my >early version the handling of makefiles failed. >Has anyone had more luck with it? > >Jens Michaelsen > > > -----Ursprungliche Nachricht----- > > Von: > > > > oo.com > > [mailto: > > oups.yahoo.com]Im Auftrag von Al Clark > > Gesendet: Samstag, 22. November 2003 15:12 > > An: ; > > Betreff: RE: [adsp] ADSP 210XX > > > > > > At 06:43 PM 11/21/2003, James Dabbs wrote: > > > > I would suggest the ADSP-21262. We are using this part > > > > in many of our current projects including our dspstak > > > > 21262sx. The 21065L is not really a good choice for > > > > a new design. > > > > > >We really need an external memory interface. Also, this particular > > >project won't make it into ROM volumes. > > > > Although it is possible to make an ADSP-21262 with ROM, there is > > no need to > > do so. You can use either parallel or serial flash memory. We use > > 2M serial > > flash with our boards. This keeps the boot memory small with only a few > > traces needed on the board. > > > > There is an external parallel port available but it does not have > > an SDRAM > > controller. This is probably the only feature that the 21262 is lacking > > over earlier parts like the 21065L. > > > > > > > > The 21161 is a better part than the 21065L. It is about 3 times faster > > (100M & SIMD). We sell boards with this part also. The biggest issue most > > people have with the 21161 (and why the 21065L is still being > > used) is that > > it is only available in BGA. BGAs are expensive and difficult to > > prototype. > > We make our dspblok 21161sm to address this problem for small production > > volumes and prototyping. You probably need at least a 6 layer pc > > board with > > this part if you have external memory such as SDRAM. > > > > Al Clark Danville Signal Processing, Inc. -------------------------------- Purveyors of Fine DSP Hardware and other Cool Stuff Available at http://www.danvillesignal.com |
Re: AW: ADSP 210XX
Started by ●December 12, 2003
