ultraviolet_ray
Newbie level 6

Hi there,
I am using an SPI interface to comunicate between Microcontroller( e.gPIC18452) and an audio codec IC.I have a little confusion in understanding the clocks.Here is what i know:
Since the microcontroller will act as MASTER, its clock will be used in transferring and receiving digital data from the IC.
But the IC is also clocked by an internal crystal (12.288 MHz)..Will this clock will be ruled out and NOT used for any internal process of the peripheral ?
OR the SPI serial Clock is just used in transferring data serially and the rest of the processing like register interfacing etc. in the IC is carried out by the internal clock(12.288MHz)?
Also , will I have to use the same frequency clocks for both the Controller and the audio IC for syncronization(like I shall provide SCLCK of 12.288 MHz) or the clock frequencies can be different ?
Thank you in advance!
I am using an SPI interface to comunicate between Microcontroller( e.gPIC18452) and an audio codec IC.I have a little confusion in understanding the clocks.Here is what i know:
Since the microcontroller will act as MASTER, its clock will be used in transferring and receiving digital data from the IC.
But the IC is also clocked by an internal crystal (12.288 MHz)..Will this clock will be ruled out and NOT used for any internal process of the peripheral ?
OR the SPI serial Clock is just used in transferring data serially and the rest of the processing like register interfacing etc. in the IC is carried out by the internal clock(12.288MHz)?
Also , will I have to use the same frequency clocks for both the Controller and the audio IC for syncronization(like I shall provide SCLCK of 12.288 MHz) or the clock frequencies can be different ?
Thank you in advance!