uC Slection for a learner project
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From: Grant Edwards on 4 May 2008 12:40 On 2008-05-04, Frank-Christian Kruegel <dontmailme(a)news.invalid> wrote: >>9. Reasonable overall cost. >>10. The availability of evaluation boards at perhaps $100 or less. >>11. Free or cheap development tools > > If you go for AVR you don't need to buy anything. Same for MSP430. There's a free limited IAR toolchain you can download from TI. And there's mspgcc, which is also free. Parallel-port JTAG interfaces start at about $15, and eval boards at about $20. www.sparkfun.com has a good selection of stuff for both MSP430 and AVR. -- Grant
From: linnix on 4 May 2008 13:17 On May 4, 9:40 am, Grant Edwards <gra...(a)visi.com> wrote: > On 2008-05-04, Frank-Christian Kruegel <dontmai...(a)news.invalid> wrote: > > >>9. Reasonable overall cost. > >>10. The availability of evaluation boards at perhaps $100 or less. > >>11. Free or cheap development tools > > > If you go for AVR you don't need to buy anything. > > Same for MSP430. There's a free limited IAR toolchain you can > download from TI. And there's mspgcc, which is also free. > Parallel-port JTAG interfaces start at about $15, and eval > boards at about $20. > But both chips are too expensive. We asked Atmel to give us something like the http://san-tech-lcd.info/images/ST2.gif They think we are nutty, so we have to downgrade to 6502 for the high volume project.
From: donald on 4 May 2008 15:00 AC Me wrote: 8< Wishful thinking snipped >8 Have you seen any project/products on the net the even comes close to your requirements ?? I think you will find some devices that will be close. So look at those and see what those have for storage vs power specifications. This will give you a good idea what others have found and what design tradeoffs they have made. Why re-invent the wheel, again. donald
From: Jim Granville on 4 May 2008 16:57 linnix wrote: >>What volumes is the 50c price point for ? >>is that price for the die, or the tested/packaged device ? > > > For the die: 50c for the OTP PROM version, 25c for the ROM version. > They should be known good die. They can be die bonded to the PCB > directly. Is this really two different die designs, or is the ROM actually factory-otp ? I'm guessing most of the large price difference is a volume thing. Silabs have been ramping OTP models, which suggest there is still some price penalty for FLASH (at least at their FAB), but they make no mention of ROM. -jg
From: linnix on 4 May 2008 17:33
On May 4, 1:57 pm, Jim Granville <no.s...(a)designtools.maps.co.nz> wrote: > linnix wrote: > >>What volumes is the 50c price point for ? > >>is that price for the die, or the tested/packaged device ? > > > For the die: 50c for the OTP PROM version, 25c for the ROM version. > > They should be known good die. They can be die bonded to the PCB > > directly. > > Is this really two different die designs, or is the ROM actually > factory-otp ? It's two different dice. The OTP die has a few more pads as well. > > I'm guessing most of the large price difference is a volume thing. > > Silabs have been ramping OTP models, which suggest there is still > some price penalty for FLASH (at least at their FAB), but they > make no mention of ROM. Flash is good for developments. OTP PROM is good for testings. ROM is good for productions. We might build an FPGA emulator for developments, probably with SRAM. > > -jg |