17 bits PLL clock couter in F28069

Piotr Romaniuk

Hi,

What is the purpose of 17bits PLL Clock Counter?
The counter is illustated in Oscillator Logic Diagram (Fig. 1-34, Technical Reference Manual, spruh18f.pdf)

Regards,
Piotr

over 9 years ago

0 Hareesh Janakiraman over 9 years ago

TI__Guru* 95315 points

That counter is used in the process of PLL locking. In older c2000 devices, the PLL lock time was fixed at 131072 OSCCLK (i.e. the input clock to the device/PLL) cycles. In Piccolo devices, the lock-time was made programmable through a 16-bit register. The figure needs to be corrected.

0 Piotr Romaniuk over 9 years ago in reply to Hareesh Janakiraman

Expert 2860 points

Thank you Hareesh,
regards
Piotr

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17 bits PLL clock couter in F28069