High-end AVR vs. low-end ARM?
in [Embedded]
|
From: voices on 8 Nov 2008 07:42 Jim Granville wrote: > Ulf Samuelsson wrote: > >>>> As for AVR32, in case you were thinking about that one, there is no >>>> real reason I would know why to start with that device. Use a Cortex- >>>> M3 device instead the upcoming standard. >> >> >> Let's see, >> >> Where do I get the Cortex-M3 flash chip with >> >> * Lower power consumption than any existing Cortex-M3 chip >> * Single 1,8V +/- 10% power-supply for CORE *AND* I/O? >> * 5V VCC , desirable for motor control? >> * debug support allowing you to read/write internal registers without >> stopping the MCU. >> * High Speed USB >> * Free Eclipse/GCC tool directly supported by the silicon vendor >> * Sustained 33 DSP MIPS when doing vector sums >> for(sum=0; i = 0; i < n; i++) sum = sum + C[i] * X[i]; >> * Migration path to low cost versions supporting Linux. >> * Same H/W tools as the AVR (JTAG-ICE Mk II & STK600) >> * Trace capable emulator at below $600 (AVRONE) > > How much flash, with the above combinations ? > > -jg You can compare Cortex-M3 to AVR32 UC3A and UC3B series, but not to AP7(hi-speed usb, mmu, linux) - it's a different class of devices. We also don't compare Intel Core2Duo to AVR ;) -- voices (at) zrgnyyvpenva (dot) pbz [ROT13]
From: steve on 9 Nov 2008 19:02 On Nov 7, 2:17 pm, "Ulf Samuelsson" <u...(a)a-t-m-e-l.com> wrote: > >>As for AVR32, in case you were thinking about that one, there is no > >>real reason I would know why to start with that device. Use a Cortex- > >>M3 device instead the upcoming standard. > > Let's see, > > Where do I get the Cortex-M3 flash chip with > > * Lower power consumption than any existing Cortex-M3 chip > * Single 1,8V +/- 10% power-supply for CORE *AND* I/O? > * 5V VCC , desirable for motor control? > * debug support allowing you to read/write internal registers without > stopping the MCU. > * High Speed USB > * Free Eclipse/GCC tool directly supported by the silicon vendor > * Sustained 33 DSP MIPS when doing vector sums > for(sum=0; i = 0; i < n; i++) sum = sum + C[i] * X[i]; > * Migration path to low cost versions supporting Linux. > * Same H/W tools as the AVR (JTAG-ICE Mk II & STK600) > * Trace capable emulator at below $600 (AVRONE) > > Googling does not give any clue... > googling doesn't give you a clue for 1.8V, 5V AVR32s either....
From: steve on 9 Nov 2008 19:11 On Nov 6, 4:42 pm, "Bresco" <bre...(a)mixmaster.org> wrote: > In terms of pricing, how do high-end AVR's (Mega-128) compare to low-end ARM > processors? The ARM's are much more powerfull and have large RAM memories on > them. > > Anyone ever compare them? I heard that ARM's are cheaper than AVR's these > days. Is this true? If you need really cheap and your watching every penny then ARM's are still higher price then low end AVR's. Cortex has low power similar to AVR and MSP430's, running and standby, and operate down to 2V. ARM's tend to come in bigger packages and require more external parts (caps), in general. As a wild guess I would say 90% of High end AVR' applications could switch to an ARM. There are some ultra low power applications where AVR and MSP430 are still king and there is no ARM substitute.
From: Ulf Samuelsson on 10 Nov 2008 18:49 "steve" <bungalow_steve(a)yahoo.com> skrev i meddelandet news:95bf218c-bc04-421b-bde3-4a857909ff31(a)u18g2000pro.googlegroups.com... On Nov 7, 2:17 pm, "Ulf Samuelsson" <u...(a)a-t-m-e-l.com> wrote: > >>As for AVR32, in case you were thinking about that one, there is no > >>real reason I would know why to start with that device. Use a Cortex- > >>M3 device instead the upcoming standard. > >> Let's see, >> >> Where do I get the Cortex-M3 flash chip with >> >> * Lower power consumption than any existing Cortex-M3 chip >> * Single 1,8V +/- 10% power-supply for CORE *AND* I/O? >> * 5V VCC , desirable for motor control? >> * debug support allowing you to read/write internal registers without >> stopping the MCU. >> * High Speed USB >> * Free Eclipse/GCC tool directly supported by the silicon vendor >> * Sustained 33 DSP MIPS when doing vector sums >> for(sum=0; i = 0; i < n; i++) sum = sum + C[i] * X[i]; >> * Migration path to low cost versions supporting Linux. >> * Same H/W tools as the AVR (JTAG-ICE Mk II & STK600) >> * Trace capable emulator at below $600 (AVRONE) >> >> Googling does not give any clue... >> > googling doesn't give you a clue for 1.8V, 5V AVR32s either.... Well that proves that google doesn't know everything :-) All things above mentioned in the offical UC3 presentation, The average Joe won't see UC3L/UC3C/UC3A3 until beginning of next year. The technology behind the 1.8V devices is already available in AT91SAM7L. The SAM7L runs the flash down to 1,55V. -- Best Regards, Ulf Samuelsson This is intended to be my personal opinion which may, or may not be shared by my employer Atmel Nordic AB
From: steve on 11 Nov 2008 17:49
On Nov 10, 6:49 pm, "Ulf Samuelsson" <u...(a)a-t-m-e-l.com> wrote: > "steve" <bungalow_st...(a)yahoo.com> skrev i meddelandetnews:95bf218c-bc04-421b-bde3-4a857909ff31(a)u18g2000pro.googlegroups.com... > On Nov 7, 2:17 pm, "Ulf Samuelsson" <u...(a)a-t-m-e-l.com> wrote: > > > > > > > >>As for AVR32, in case you were thinking about that one, there is no > > >>real reason I would know why to start with that device. Use a Cortex- > > >>M3 device instead the upcoming standard. > > >> Let's see, > > >> Where do I get the Cortex-M3 flash chip with > > >> * Lower power consumption than any existing Cortex-M3 chip > >> * Single 1,8V +/- 10% power-supply for CORE *AND* I/O? > >> * 5V VCC , desirable for motor control? > >> * debug support allowing you to read/write internal registers without > >> stopping the MCU. > >> * High Speed USB > >> * Free Eclipse/GCC tool directly supported by the silicon vendor > >> * Sustained 33 DSP MIPS when doing vector sums > >> for(sum=0; i = 0; i < n; i++) sum = sum + C[i] * X[i]; > >> * Migration path to low cost versions supporting Linux. > >> * Same H/W tools as the AVR (JTAG-ICE Mk II & STK600) > >> * Trace capable emulator at below $600 (AVRONE) > > >> Googling does not give any clue... > > > googling doesn't give you a clue for 1.8V, 5V AVR32s either.... > > Well that proves that google doesn't know everything :-) > > All things above mentioned in the offical UC3 presentation, > The average Joe won't see UC3L/UC3C/UC3A3 until beginning of next year. > > The technology behind the 1.8V devices is already available in AT91SAM7L. > The SAM7L runs the flash down to 1,55V. > > -- > Best Regards, > Ulf Samuelsson > This is intended to be my personal opinion which may, > or may not be shared by my employer Atmel Nordic AB- Hide quoted text - > > - Show quoted text - Ok, the 7L are nice, though wish they expand the family I've noticed in the Atmel slides packages they say FIR filter is 11 times faster then on a CortexM3. That is hard to believe, not sure why, Cortex is 2 cycle MAC, AVR32 is single cycle, maybe with the 2 wait states on Cortex FLASH they came up with that number? * Sustained 33 DSP MIPS when doing vector sums for(sum=0; i = 0; i < n; i++) sum = sum + C[i] * X[i]; the 33 MIPS is at what clock speed? |