can AT91SAM7X256 have external flash and DRAM? AT91SAM7X256doesn't have EMI(external memory interface) , is it possible to extend external flash and DRAM? thanks
- posted
17 years ago
Do I have to use a ARM MCU with EMI to use external flash and DRAM?
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- posted
17 years ago
--
The SAM7X does not have an external data bus or address bus as far as I am aware so your only options are serial devices for a little more flash, or a very slow bit banged interface though an IO port. Neither of these are any good for executing code. I believe there is an equivalent part that has an external bus - why not use that?
Regards, Richard.
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- posted
17 years ago
hi, Richard,
thanks for your answer, I have another question for you, if I use AT91SAM7x256 with your RTOS from freeRTOS.org, what size of footprint is it? do I still have room to grow if I add TCP/IP stack and/or USB host/device later on?
thanks
FreeRTOS.org wrote:
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- posted
17 years ago
If you need external flash and SDRAM, you'd be better off with the AT91SAM9260. (Unless you really need the integrated CAN controller)
-- Best Regards, Ulf Samuelsson ulf@a-t-m-e-l.com This message is intended to be my own personal view and it may or may not be shared by my employer Atmel Nordic AB
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- posted
17 years ago
Take a look at the FAQ - info is provided for ARM builds. I have used the SAM7X256 with uIP and lwIP, both with a simple USB driver included in the build so I don't think size is an issue.
Regards, Richard.
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