VCNTLID in Smartreflex

Luis Martin69

Other Parts Discussed in Thread: UCD9222

Hello

I have to question using VCNTLID register.

I 'm using TMDSEVM6678L EVM board , in smartreflex the VCNTLID register can be modified by software for changing CVDD value in the UCD9222 or is only for seeing the register?

Best regards

Luis

over 10 years ago

0 Raja over 10 years ago

TI__Guru* 81335 points

Hi Luis,

VCNTLID register is provided for debug purposes only. It is defined in the PSC UG in Figure 3-2 where bits 21:16 are the only valid bits containing the 6-bit VID value. This register is not intended to be used for any type of software-based Smart Reflex control. The VCNTL pin output must be latched and used to control the voltage long before software is executing on the core or an external master such as I2C can access this internal register.

Refer below e2e thread,

Thank you.

0 Luis Martin69 over 10 years ago in reply to Raja

Prodigy 100 points

Thanks for your answer

I am using in debug, I've seen that is only for read.

Thanks

Best regards

Luis

0 Raja over 10 years ago in reply to Luis Martin69

TI__Guru* 81335 points

Hi Luis,
Thank you for the update.

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VCNTLID in Smartreflex