We are using custom made tms320C6747 board with 24Mhz crystal and configured CPU frequency to 300MHz
i.e. CPU Frequency = 24 (Crystal)* 25(PLL MULT) /2(POSTDIV).
we are making use of OBSCLK output pin with OSCDIV (Divide ratio = 10) to verify the crystal oscillator clock ,
CPU clock and all peripheral clocks (SYSCLK1 to SYSCLK7).
For SYSCLK1 ,SYSCLK2,SYSCLK4 we are maintaining the fixed clock ratios 1 , 2 , 4 respectively.
Crystal oscillator clock ( 24Mhz) ,SYSCLK1 and SYSCLK7 showing the frequency as desired.
Rest of the system clocks show different frequencies.
Example :a) SYSCLK2 is configured with default divide ratio of 2 and Divide ratio of 10(OSCDIV ) (300MHz /2)/10 = 15MHz/),
but it shows 30Mhz at OBSCLK ..
b) SYSCLK4 is configured with default divide ratio of 4 and Divide ratio of 10(OSCDIV ) (300MHz/4)/10 = 7.5MHz) ,
but it shows 15Mhz at OBSCLK
i am using c6747 gel file which is provided by ti.
Regards
Ravi prasad B S
