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TDA4VM: Enable HFOSC1

Part Number: TDA4VM

Hi, 

I am working on Jacinto 7 evm (TDA4VMXEVM)... I want to use external oscillator OSC1_XI/XO as main clock source for the main domain as shown in figure below.

The Technical Reference Manual mentions that HFOSC1 is disabled by default:

In order to turn ON/OFF the CTRLMMR_WKUP_HFOSC1_CTRL[7] needs to be SET/RESET:

My Query:

1. I couldn't find CTRLMMR_WKUP_HFOSC1_CTRL register.

2. If I am wrong, how I can turn ON use External oscillator OSC1_XI/XO?

3. As shown in Pic#1 above, which register contains HFOSC_SEL[n]?