I have some DW1000 boards, and some boards have CLKPLL Loss-of-Lock event occasionally when I use the
SPI rate of 18MHz. When I use the SPI rate of 9 MHz or 14 MHz, this problem is not going to happen.
I follow the manual and wait until CLKPLL is locked to use the high speed SPI.
leo Theunissen said the SPI interface to the DW1000 uses the on-chip system clock. When the CLKPLL is locked this system
clock is provided by the CLKPLL and the maximum permitted SPI CLK is approx. 18 MHz;
And the manual said the SPI rate of up to 20 MHz can be used. So which one is the highest rate of SPI rate, 18MHz or 20MHz?
Thank you in advance