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

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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 Start a New Thread

--- 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
>

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