DIR9001: BCKO and LRCKO with no RXIN

na na78

Guru 16770 points

Part Number: DIR9001

When does RXIN is not input, how does BCKO, LRCKO and SCKO output?

(ALL output zero? or Unstable output?)

I'm assuming PLL mode.

BestRegards

over 8 years ago

0 na na78 over 8 years ago

Guru 16770 points

Hi team

I appreciate if you could reply.

BestRegards

0 Diego Melendez over 8 years ago in reply to na na78

TI__Guru 57800 points

Hi, Na,

Sorry for the delay, we will take a look to your question and will get back to you as soon as possible.

Best Regards,

-Diego Meléndez López
Audio Applications Engineer

0 na na78 over 8 years ago in reply to Diego Melendez

Guru 16770 points

Hi Diego

Thank you. I'm looking forward to your reply.

BestRegards

0 na na78 over 8 years ago in reply to na na78

Guru 16770 points

Hi

Do you have update?

BestRegards

0 Ravi Patil over 8 years ago in reply to na na78

TI__Expert 5645 points

Hi Na Na,
As you may already know, DIR9001 can be configured in TWO modes -
1. if the device is configured in PLL mode (CKSEL = L), output clocks (SCKO, BCKO, LRCKO) are generated from the PLL source clock.
2. if the device is configured in XTI mode (CKSEL = H), output clocks (SCKO, BCKO, LRCKO) are generated from XTI source clock.

In PLL mode, when we do NOT have RXIN signal, the Clock output pins will be in LOW state. As a result, SCKO/BCKO/LRCKO will be LOW when RXIN is not present.

Best regards,
Ravi

Audio

Audio forum

DIR9001: BCKO and LRCKO with no RXIN