I"m reading the Data Sheet in regards to the DAC calibration procedure. The Data Sheet states that a required calibration must be manually set and then cleared. It also states a calibration time.
We are implementing a serial interface.
Is that time how long the pulse is meant to be held HIGH, or is that the required time to wait until calibration is finished?
How does IO_Update before involved? Is it required?
I saw another thread that said to set DAC_CAL =1 , IO UPDATE, DAC_CAL=0 IO UPDATE
Where are we supposed to wait.
2 ) Second question
If I am using the profile registers and changing profile select pins do I need to ever strobe IO_UPDATE, the data sheet mentioned "The Profile Select Pins. Digital inputs (active high). Use these pins to select one of eight phase/frequency profiles for the DDS. Changing the state of one of these pins transfers the current contents of all input/output buffers to the corresponding registers. State changes must be set up on the SYNC_CLK pin (Pin 82)."
I read that as if I write a Profile register over SPI, I do not need to strobe IO_UPDATE that simply changing the profile pins will update my output.
Is this correct?