8051 has no cost to license and if you are mostly using an accelerator to decode mp3, then the servicing of it is simple enough. Why rewrite the code you alread

8051 has no cost to license and if you are mostly using an accelerator to decode mp3, then the servicing of it is simple enough. Why rewrite the code you already have (from before cortex-m0 existed) or redesign the accelerator you already have?