Other Parts Discussed in Thread: LMK05318
I used the plate-crystal calibration as the main clock, and both the formula and the central frequency of vco1 met the requirements of entering freerun mode. However, when the state of the led light was adjusted to pll1 vco calibration active, it did not light up. Even if manually adjusted by pll1powerdown, the led light representing pll1 vco calibration active only flicker once.However, when I cascade apll2 xo, the light from the pll2 vco calibration active is turned on, and when I cascade apll2 to apll1, the light from the pll2 vco calibration active is also turned off.
In addition, after I connected the reference, DPLL and apll1 cascade were used. When the led light indication was the default, the DPLL lock requirement could be met, and the led light was turned back to indicate pll1 vco calibration active and pll1 lock detected (lol*), they still not on,base on the miniature below ,the pll1 vco calibraiton and pll1 lock detected are the first and second steps but they don't work,what do these phenomena mean?
