PCM1860: PCM1860 clocking: float XI and use SCKI?

Borge Strand-Bergesen

Part Number: PCM1860
Other Parts Discussed in Thread: PCM1861

Hi,

I'm working on a new design where the PCM1860(1) will be used in a system with a good 3,3V MCLK source. Can I use only that, on SCKI? If so, can I let XI float, or should I ground it?

Thanks,

Børge

over 1 year ago

0 Daveon Douglas over 1 year ago

TI__Mastermind 18580 points

You can connect unused XI pin to DGND and select to use only SCKI in pg 0 reg 32.

0 Borge Strand-Bergesen over 1 year ago in reply to Daveon Douglas

Intellectual 695 points

Thank you Douglas,

This is the PCM1860 (or PCM1861) with hardware control. Does the same apply there? I see the OR gate on the equivalent schematic but wanted to be sure nonetheless.

Thanks,

Børge

+1 Daveon Douglas over 1 year ago in reply to Borge Strand-Bergesen

TI__Mastermind 18580 points

Yes, connecting XI to DGND and providing MCLK to SCKI will work, the IC will source/choose it internally (9.3.9.4.1 of d/s)

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PCM1860: PCM1860 clocking: float XI and use SCKI?