Author Topic: ATSAMV70 & ATSAME51 series  (Read 733 times)

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Offline stroh90

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ATSAMV70 & ATSAME51 series
« on: February 18, 2019, 10:02:33 pm »

I'm looking for fast(ish) M4 / M7 parts with ISO CAN-FD. Differential ADC would be nice too. I don't have much experience with recent Atmel SAM parts -some folks around here seem to be suspicious of them.

The most recent Atmel part I messed around with was an ATSAMA5 and I had no problems with that at all. Assuming you don't need CAN-FD of course - it's advertised as a headline feature, but in the errata, completely broken !!

I'm familiar with STM32 parts and as far as I can see the only ST part with ISO CAN-FD is the top end, stupidly blinged-out H7 (but no differential ADC)

Does anyone have anything good or bad to say about these (and *recent*) Atmel ARM parts? I know NXP & ST seems more popular around here and would probably have fewer surprises...


Online ataradov

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Re: ATSAMV70 & ATSAME51 series
« Reply #1 on: February 18, 2019, 10:12:43 pm »
I work for Microchip, so my opinion of the parts is probably irrelevant here.

But as far as CAN-FD goes, both parts include working CAN-FD, that is actually a Bosch IP used by many other companies.

With V70, you need to get Revision B parts, since Rev A had an older IP, which has widely known CRC issue, which was fixed in 2015 version of the ISO standard, but the parts were in the pipeline before that happened.

Offline JPortici

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Re: ATSAMV70 & ATSAME51 series
« Reply #2 on: February 18, 2019, 10:31:16 pm »
I'm going to throw another player in the field: if your application doesn't *need* floating point or ludicrous clock speeds dsPIC33CH/CK could be worth a look

that is actually a Bosch IP used by many other companies.

i thought they were going with kvaser again... or is kvaser actually using bosch's IP? Edit: Sorry i was thinking of the dsPIC, the ATSAM has a completely different register organization so they can't be using the same IP
« Last Edit: February 18, 2019, 10:38:04 pm by JPortici »

Offline lucazader

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Re: ATSAMV70 & ATSAME51 series
« Reply #3 on: February 19, 2019, 02:10:23 am »
I know you discounted the STM32H7 series, however have a look at the H750 line.
The H750VB is competitively priced compared to the SAMV70 in singles, and starts to get quite a bit cheaper when purchased in qty 100 or 1k.
The only downside to the H750 series is they are the 'access' line, and have very limited on chip flash (well, still 128k), if you need more you would need to use a QSPI flash chip, but they are pretty cheap.

It has:
- 3x 16bit 3.6MSPS adc's which can be used in differential mode.
- 2x FD-CAN modules (haven't used them so don't know what underlying IP they use etc)
- Operate at up to 400MHz if needed


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