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Original question:
DAC38J84: DAC38J84: LMFS：4221 No Output,Serdes PLL can not Locked
hello, jim
My custom board can work normal when setting as follows
Fdata = 300M
LMF =442
interpolation = 4
Fdac = 1200M
SerDes Linerate = 6000M
but when I double the interpolation to 8, Fdac to 2400M, it can't sync. I have modified three registers
reg 4x 8x
0x25 0x4000 0x6000
0x3b 0x800 0x1800
0x00 0x218 0x418
the clk is generated by lmk04828, vco is locked to 2400M, when divider = 2, it output 1200M to dac, when divider=1, it output 2400M to dac。then how to check hardware?
