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Difference between AT91sam and AT91FR

Started by pri_ans_h March 12, 2010
What is the difference between AT91sam and AT91FR as i am using AT91FR40162S . As i am a fresher for this so can any body help me for some basics like

1) which start.s file should i use as i am using Keil tool so there is one start.s file which is under Atmel folder?????
2) wht all changes i need to do in start.s file. ?????
3) where i can specify my C code entry point in start.s file
I know many people here will be highly experienced. So please give me the answers for my there simple questions.

Thnx in advance

The main difference is the sam7 has no external memory bus. The other, older family can access external flash or sram, though you might need a dram controller if you want dynamic ram. The sam is really a system on a chip, while the 40162s lacks many of the peripherals. Internally they are both ARM7 cores.

Atmel has a lot of online sample code for each of these chips. I would suggest downloading these and searching for appropriate source code.

Chris

----- Original Message -----
From: pri_ans_h
To: A...
Sent: Friday, March 12, 2010 5:00 AM
Subject: [AT91SAM] Difference between AT91sam and AT91FR

What is the difference between AT91sam and AT91FR as i am using AT91FR40162S . As i am a fresher for this so can any body help me for some basics like

1) which start.s file should i use as i am using Keil tool so there is one start.s file which is under Atmel folder?????
2) wht all changes i need to do in start.s file. ?????
3) where i can specify my C code entry point in start.s file

I know many people here will be highly experienced. So please give me the answers for my there simple questions.

Thnx in advance
--- In A..., "Chris DeLise" wrote:
>
> The main difference is the sam7 has no external memory bus. The >other, older family can access external flash or sram, though you >might need a dram controller if you want dynamic ram. The sam is >really a system on a chip, while the 40162s lacks many of the >peripherals. Internally they are both ARM7 cores.
>

The AT91SAM7SE subfamily has an EBI. I would select this one over the AT91FR if the EBI is the main reason for choosing the AT91FR.

Ewout Boks
> Atmel has a lot of online sample code for each of these chips. I would suggest downloading these and searching for appropriate source code.
>
> Chris
>
> ----- Original Message -----
> From: pri_ans_h
> To: A...
> Sent: Friday, March 12, 2010 5:00 AM
> Subject: [AT91SAM] Difference between AT91sam and AT91FR
>
> What is the difference between AT91sam and AT91FR as i am using AT91FR40162S . As i am a fresher for this so can any body help me for some basics like
>
> 1) which start.s file should i use as i am using Keil tool so there is one start.s file which is under Atmel folder?????
> 2) wht all changes i need to do in start.s file. ?????
> 3) where i can specify my C code entry point in start.s file
>
> I know many people here will be highly experienced. So please give me the answers for my there simple questions.
>
> Thnx in advance
>