High-end AVR vs. low-end ARM?

[Database Administrator]

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?

[Database Administrator]

On 6 Nov, 21:42, "Bresco" 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?

ARM chips like the NXP LPC2000 can be cheaper than high-end AVRs, and
offer much more performance. However, they consume more power and
could work out more expensive by the time they are put on a PCB,
because of the requirement for two supplies.

Leon

[Database Administrator]

On Nov 6, 9:37 pm, An Schwob in the USA wrote:
> On Nov 6, 1:50 pm, Leon wrote:
>
> > On 6 Nov, 21:42, "Bresco" 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?
>
> > ARM chips like the NXP LPC2000 can be cheaper than high-end AVRs, and
> > offer much more performance. However, they consume more power and
> > could work out more expensive by the time they are put on a PCB,
> > because of the requirement for two supplies.
>
> > Leon
>
> Hi,
>
> @ Leon, I agree in everything but one, the power consumption. For
> example the mentioned LPC2000 can run with 40 mAs @ 70 MHz (2103), my
> guess would be you need 10 AVRs, running @ 16 MHz to match the
> performance in computing. AFAIK they need more than 4 mAs @ 16 MHz.
> On the other hand there is a HUGE difference in standby current. AVRs
> at least the older ones can go into standby mode at or below 1uA, if
> one if the ARM devices gets hot the standby current exceeds 100 uAs
> easily.

Just one more thing. The 1.8V to 5.5V operating range for the AVR is
very useful for battery devices. You usually need higher than 1.8V,
even for ARM with build-in regulator.

[Database Administrator]

>>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...


--
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

[Database Administrator]

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

[Database Administrator]

"Jim Granville" skrev i meddelandet
news:4914aeba$1@clear.net.nz...
> 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
>

The full combination does not exist.
Just listed some properties, that could make people want
to think twice about focusing 100% on CM3.

UC3L = 1.8V VCC
UC3C = 5V
UC3A3 = High Speed USB
UC3B & UC3L should be lower power than CM3
UC3A/C has 66 MHz operation and thus 33 DSP MIPS
AP7 runs Linux, Need Cortex-A8 for this and that ain't cheap.

In the end, it will be the right combination of peripherals
which will be key to the decision.


--
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

[Database Administrator]

Ulf Samuelsson wrote:
> Where do I get the Cortex-M3 flash chip with
> * Lower power consumption than any existing Cortex-M3 chip

Well, duuuuuh. It's an impossible question!

[Database Administrator]

"Clifford Heath" skrev i meddelandet
news:4914cc31$0$4449$afc38c87@news.optusnet.com.au ...
> Ulf Samuelsson wrote:
>> Where do I get the Cortex-M3 flash chip with
>> * Lower power consumption than any existing Cortex-M3 chip
>
> Well, duuuuuh. It's an impossible question!

Yep, but I think people get the hint ;-)


--
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

[Database Administrator]

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]

[Database Administrator]

On Nov 7, 2:17*pm, "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)
>
> Googling does not give any clue...
>

googling doesn't give you a clue for 1.8V, 5V AVR32s either....