CDCM6208: About power on and register setting sequence.

Sho Ogane

Part Number: CDCM6208

Hi all.

I have two questions about CDCM6208.

1.I think that there is no power supply sequence in particular otherwise than the following.
　Is it correct my understanding?
"It is necessary to ensure that device calibration occurs AFTER the DVDD supply as well as the VDD_PLL1, VDD_PLL2, VDD_PRI,
and VDD_SEC supply are all operational, and the voltage on each supply is higher than 1.45."

2.If device powered up normally, can we set register(for example output frequency) any time?

Best Regards,
Sho

over 8 years ago

0 Lane Boyd over 8 years ago

TI__Genius 16845 points

Hi Sho,

A1. Yes, that is the main power supply sequencing requirement that must be followed.

A2. Yes, you can set the registers at any time. If in SPI mode, you can even set the registers when RESETN is low (see Figure 35 from the datasheet).

Kind regards,
Lane

0 Sho Ogane over 8 years ago in reply to Lane Boyd

Genius 5575 points

Hi Lane-san

Thank you for your reply. I understood it.

Best Regards,
Sho

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CDCM6208: About power on and register setting sequence.