PCM3060 Question

Cliff Wold

Other Parts Discussed in Thread: PCM3060

I have a question about the PCM3060. We're trying to verify that we have the SPI working correctly. According to the datasheet register 69 has a couple of bits AZRO and ZREV that can be set to control the output levels on ZEROL and ZEROR.

I have a couple of questions about this:

1. does writing register 69 have an immediate effect on the pins ZEROR and ZEROL?
2. if we're not yet writing I2S data, do we need to write to register 64, bit DAPSV (to take the DAC out of power-save mdoe) to before trying to program register 69?

Thanks.

over 15 years ago

0 Don Dapkus over 15 years ago

TI__Guru**** 189401 points

Hi, Cliff,

It seems fair that both statements are true. Has your customer tried this, and it doesn't work, or are they just noodling around?

-d2

0 Cliff Wold over 15 years ago in reply to Don Dapkus

Prodigy 135 points

I have a test mode that issues a hardware reset to the PCM3060, initializes SPI interface, sends the wakeup (clears DAPSV), and then sets AZRO & ZREV. We have inspected the SPI signals, and they appear to be correct, but I have not observed a change in ZEROR/ZEROL.

Thanks.

0 Don Dapkus over 15 years ago in reply to Cliff Wold

TI__Guru**** 189401 points

Hi, Clif,

Sorry for the delay, I've been out of the office. this is a little deeper than I know, so I'm going to have to get one of my guys to dig into it for you. It may take a while until he gets to it, he's pretty busy.

In the meanwhile, check your timing, do you have proper timing between power up, reset, starting of SPI, etc?

-d2

0 Patrick Galvin over 15 years ago in reply to Don Dapkus

TI__Genius 16270 points

Cliff,

What is the time between clearing DAPSV and setting the AZRO and ZREV bits? Also what are AZRO and ZREV being set to?

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PCM3060 Question