ADSP 21489

Dear all, I bought a board that is equipped with the aforementioned processor, but unfortunately, the sample rate is factory set at 96K. Since I have to load FIR filters into it, I would like to set the sample rate to 48K which would help me to use more TAPS. The fact is that changing the sample rate on these processors is not possible by software using for example sigmastudio, but the chip with embedded crosscore must be flashed directly, which unfortunately I cannot do. So I need someone who knows how to do it and who will help me with a step-by-step guide or in any other way. Thanks in advance to those who want to help me, I really need it. Greetings to everyone