Hi to you LouijieC
I have resolved my problems...
Two points of workaround: first, is necessary to wait a small part of time, prior to send next command on serial interface, after the update of a CFR2, expecially if we set the not-default modes as CRYSTAL CLOCK MODE, PLL (out of p.down and Range) and VCO2 SEL.
Otherwise the PLL dont set-up and dont lock.
At start-up of the AD9913, after 100ms from out-of-reset and out-of p.down, i send as first command ,the new configuration of CFR2, and only after a wait of (about) 10ms i proceed with setting of other registers... This strategy solve.
The second, effectively as writed on data sheet (pag.23of32), reading the status of profiles registers "...requires that the external profile select pins (PS[2:0]) be configured to select the corresponding register." otherwise we read only the register selected by external pins, also if send via serial interface any other address of profile register. This limitation is not active on writing profiles registers.
Thanks