TMS320F28335: SYSCLKOUT

Hi Sagar,

SYSCLKOUT has same frequency as CLKIN derived from diagram below based on PLL settings of the particular device based on user settings.

Please refer to diagram below from TRM (Manual) for more insights.

The SYSCLKOUT is fed to individual peripherals and so yes this is frequency at which the peripheral logic operates on, might be different for some peripherals

For external pins it depends what configurations you have in the peripheral for the output signal, it will output accordingly. For example ePWM you can set the frequency for output signal in ePWM configuration registers and GPIO works accordingly

Thanks,

Prarthan 

Thanks Prathan for your reply.

ePWM configuration how much max pwm i can set, does it would be 100MHz or 150 Mhz depending on my core supply +1.8V for 100MHz and +1.9V for 150MHz

Device clock frequency (system clock),
fSYSCLKOUT
F28335/F28334/F28235/F28234 2 150
MHz
F28333/F28332/F28232 2 100

Hello Sagar,

These are min/max values of SYSCLKOUT specified in datasheet. As I already pointed out before SYSCLKOUT frequency is dependent on what the configuration are in your case.

Sagar Dudhal said:

Device clock frequency (system clock),
fSYSCLKOUT
F28335/F28334/F28235/F28234 2 150
MHz
F28333/F28332/F28232 2 100

ePWM frequency is dependent on registers configuration : 

PWM frequency is configurable using pwm registers

Sagar Dudhal said:

ePWM configuration how much max pwm i can set, does it would be 100MHz or 150 Mhz

ePWM max frequency is governed by GPIO limitations in table below : 

Thanks,
Prarthan.

Thanks for this good info Prathan.

So basically system clock is internal access  the speed at which the internal clock of the microcontroller operates. This clock signal determines the rate at which the microcontroller can execute instructions and perform tasks.

Correct me if i am wrong.