TMS320F28374S: cannot work in 200MHz sysclk

Joe Ji

Expert 4360 points

Part Number: TMS320F28374S

Tool/software:

Hi Expert

My customer tests the below configures for f28374 pll configuration:

InitSysPll(XTAL_OSC,IMULT_40,FMULT_0,PLLCLK_BY_2); with 10M Xtal, device cannot work;

InitSysPll(XTAL_OSC,IMULT_20,FMULT_0,PLLCLK_BY_2); with 20M Xtal, device cannot work;

InitSysPll(XTAL_OSC,IMULT_20,FMULT_0,PLLCLK_BY_2); with 10M Xtal, device cannot work;

Seem F28374 cannot work in 200MHz with the pll configuration, the same code and XTAL work well in F28377s in 200MHz sysclk.

the XTAL datasheet is attached:116-600002-00 xtal10M HC-49SMD.pdf

Could you please share the suggestions to solve the issue?

Thanks

Joe

over 1 year ago

+1 Prarthan Bhatt over 1 year ago

TI__Mastermind 19946 points

Hi,

There is no issue in using 200Mhz SYSCLK, please check if the XTAL frequency is as mentioned above. Try swapping the 74 with working 77 board, I don't think there is an issue with 74 as such.

Joe Ji said:
Seem F28374 cannot work in 200MHz with the pll configuration

Joe Ji said:
the same code and XTAL work well in F28377s in 200MHz sysclk

There is no difference in PLL for 74 and 77.

Thanks

0 Joe Ji over 1 year ago in reply to Prarthan Bhatt

TI__Expert 4360 points

Hi Prarthan

Thanks for checking, the issue is found, we adjust the XTAL power supply, and it works now.

Thanks

Joe

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TMS320F28374S: cannot work in 200MHz sysclk