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TMS320DM8168: Speed Range Part marking

Part Number: TMS320DM8168

Hi,
 
Is there a physical marking on the device that identifies the processor speed grade? Specifically, how can one differentiate between the TMS320DM8168CCYG, TMS320DM8168CCYG2, and TMS320DM8168CCYG4? I could not locate this detail in the available documentation.
 
Thanks,
Vincent