Code execution from external Flash

razumovskyeduar — Wed, 29 Mar 2017 07:49:00 GMT

Hello

Is it possible to execute a code on kinetis K22 using external Flash ?

If so, what are the recommendations for flash type, interface type & execution performance ?

Thanks & Regards

Eduard

amirshteinberg‌

Re: Code execution from external Flash

Hui_Ma — Wed, 05 Apr 2017 05:19:07 GMT

After the K22 product reset, the code execute from internal Flash.

While, customer still could jump to execute the code located in external Flash via FlexBus interface.

The FlexBus module could interface with external NOR Flash or MRAM products.

The K22 product should initialize the FlexBus module at first. After that, jump the application from internal Flash to external Flash.

The FlexBus clock is up to 50MHz, while it need take 4 cycles to read data(instruction)(not using burst mode) with related port size.

Wish it helps.

Have a great day,
Ma Hui

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Code execution from external Flash

Re: Code execution from external Flash