Other Parts Discussed in Thread: LMK04906, CODELOADER
Good afternoon!
I use LMK04906 clock conditioner in my design. My board has 100 MHz external VCXO in PLL1 and I want to use 10 MHz reference signal at CLKin1.
I use Code Loader 4 software to configure the internal registers values. But when I load them to LMK04906 it doesn't have anything on its outputs.
I've successfully transmitted external VCXO signal to CLK4 output, so my uWire interface seems to work correctly and output buffer does work too.
It looks like internal VCO doesn't start or something. I guess, that even if it is unlocked, it should generate sine output at default frequency (or maybe floating frequency).
Maybe something wrong with SYNC?
Does anybody can share lmk04906 worked example registers values?
I have: dual PLL, Int VCO, VCO = 2400 MHz, CLKout4 should be 2400 MHz (no divider) LVDS, CLKout0 should be 1200 MHz (div=2) LVPECL
Ref_freq = 10 MHz,
R1=10
N1 = 100
PDF1 = 1 MHz
VCXO = OSCin = 100 MHz
R2= 20 (doubler on)
PN2 =2
N2 = 120
PDF2 = 10 MHz
VCO = 2400 MHz
And registers:
R0 (INIT) 0x80160140
R0 0x00140040
R1 0x80140141
R2 0x80140142
R3 0x80140043
R4 0x00140024
R5 0x80140145
R6 0x04440006
R7 0x01010007
R8 0x04010008
R9 0x55555549
R10 0x9142410A
R11 0x0401900B
R12 0x1B0C006C
R13 0x2302826D
R14 0x0200000E
R15 0x8000800F
R16 0xC1550410
R24 0x00000058
R25 0x02C9C419
R26 0xAFA8001A
R27 0x1000029B
R28 0x0140191C
R29 0x01800F1D
R30 0x02000F1E
R31 0x001F001F
As for me - everything that should be done is done, but I've got silence on CLK0 and 4.
