CAN controller for automotive project

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#1
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Hi there,

We have to decide which one of these companies to follow for our new automotive can project:

1. Fujitsu
2. NEC
3. ATMEL

Would you suggest me to use ATmega automotive CAN microcontrollers and not the others???

Thanks,

Michael.

Michael.

User of:
IAR Embedded Workbench C/C++ Compiler
Altium Designer

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icarus1 wrote:
Would you suggest me to use ATmega automotive CAN microcontrollers and not the others???

It is not a question. Any uC is good if it's suitable for your demands. I had some projects with 16-bit Fujitsu using CAN controller. All I can say - it works. I'm pretty sure mega CAN controllers work too, and the choice is up to you and your project.

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icarus1 wrote:
Would you suggest me to use ATmega automotive CAN microcontrollers and not the others???
Personally I wouldn't do that. If this is going into a product there are ways to engineer/pick a "best possible" solution. If this is a hobby project then lots of things do not need to be considered.

For a mass produced product, development costs can be spread across the entire sale life of the product. This makes fairly expensive up front costs quite reasonable. For a small volume niche product, low development costs are usually critical to making a profit. Then you have cost to produce each unit, support costs and so on. If you ignore proper testing before releasing the product, field repairs/warranties can kill your profits. For a product I would consider buying/renting a dedicated CAN protocol analyzer (with acceptance mask limits testing for at least initial production testing). If your going to do high temperature automotive products, then environmental testing equipment would be necessary.

If its a hobby project your "User of:" list above covers the development tools costs for ATMEL processors. Unless you have development tools for other brands of processors already available, then ATMEL would be the first choice on the list of possible processors to use.

Be aware of the CAN specification and whatever ISO specification you use. If you are going to push the limits (for example, highest baud rates at maximum CAN bus wiring lengths) then you have additional work to do up front to ensure your processor choice and CAN bus interface transceivers will work at extremes. If you are going to implement an entire CAN network with your product/project, keep in mind the CAN bus wiring is an important part of how well a CAN network functions.

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How about :

Freescale, Microchip or Renesas (hitachi)

Erm, that's not helping to wittle down the choice is it :S !

<º))))><

I am only one lab accident away from becoming a super villain.

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icarus1 wrote:
Hi there,

We have to decide which one of these companies to follow for our new automotive can project:

1. Fujitsu
2. NEC
3. ATMEL

Would you suggest me to use ATmega automotive CAN microcontrollers and not the others???

Thanks,

Michael.


Why not consider all or most rather than those 3?