AM3359 SPI Clock out frequency:

Hi,

We have ICE board,

As i'm new to this AM3359 processor i have few doubts related to SPI clock out frequency,

AM3359 is configured as Master mode for SPI Communication.

We are trying to change the SPI clock out frequency, As mentioned in Technical reference manual 24.4.1.8 by updating the CLKD bits we can can change the SPI clock out frequency ( that is CLKSPIREF / CLKD bits)

It is mentioned in TRM 24.2.2 CLKSPIREF  with Interface clock and functional clock

1) Which one should we consider either Interface clock ( 100MHZ) or functional clock(48MHZ)?

2) What is the difference between these two Interface clock and functional clock ( also refered 8.1.3.1 PRCM).

3) In the SDK example it is considered to be 48MHZ , Can we drive the SPI Clock out till 48MHZ ?

Regards,

Bindu