According to the BF547 specification, the DSP supports mobile DDR memory with SCLK frequency from 120 MHz to 133 MHz (page 35). I have some questions:
1. What is the issue if we run it slower than 120 MHz?
2. By default, the BF547 powers up with PLL Mult = 8 and SCLK Div = 4. This yields a SCLK of 26 MHz with 13MHz input clock (my case). Must I program the OTP for the DSP to even boot to the mobile DDR?
Thank you in advance!