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Hi,
I have successfully loaded the registers with CodeLoader software and RF output looks great with USBANY interface. Now, I tried to program SPI directly to the EVM pins with wires using standard LINUX SPI interface (the ZYNQ built-in SPI interface) but it does not seem to lock the PLL. I checked registers programmed and found I have written exactly the same things as CodeLoader's one analyzed by logic analyzer.
Here are what I have written. 10MHz ref, R=5, PD=2000, N=1250, K=0, channel divider by 2.
R5 (INIT) 0x40870010
R15 0x021FE80F
R13 0x4082C10D
R10 0x210050CA
R9 0x03C7C039
R8 0x207DDBF8
R7 0x00082317
R6 0x000004D6
R5 0x0010A805
R4 0x00000004
R3 0x20017683
R2 0x0C000112
R1 0xC4000051
R0 0x44E20000
As soon as registers were written, current changes from 37mA to 265mA. But the LD LED does not lit. I think I am missing one small step. Can you check what is going on?
Thanks,