PCM4104: about FS1、FS0、FMT2、FMT1、FMT0、MUTE、DEM1、DEM0

Yasushi Fujiwara

Part Number: PCM4104

Hello Experts,

My customer would like to use PCM4104 in standalone mode. If customer would like to change sampling mode, Audio data format configuration, MUTE and De-emphasis configuration, what customer should do? It should assert /RST(9-pin) to logic low and change input level, and then de-assert /RST to logic high?

Best Regards,
Fujiwara

over 2 years ago

0 Jeff McPherson over 2 years ago

TI__Mastermind 46125 points

Hi Fujiwara-san,

Yes, the customer should do as you described, making sure to follow the reset guidelines on page 16.

Best regards,
Jeff McPherson

0 Yasushi Fujiwara over 2 years ago in reply to Jeff McPherson

TI__Genius 12725 points

Hi Jeff-san,

Thank you for answer. I understand.

Customer would like to know a timing requirements as follows. Would you answer it, please?
1. Do you have a timing requirement from /RST=H to L transition to setting the logic level for FS1, FS0, FMT2, FMT1, FMT0, MUTE, DEM1 and DEM0 terminals?
2. Do you have a timing requirement for /RST=L to H transition from setting the logic level for FS1, FS0, FMT2, FMT1, FMT0, MUTE, DEM1 and DEM0 terminals?

Best Regards,
Fujiwara

+1 Jeff McPherson over 2 years ago in reply to Yasushi Fujiwara

TI__Mastermind 46125 points

Hi Fujiwara-san,

We don't have a requirement for that case. My recommendation is to follow the reset guidelines on page 16 to put the device in reset. Then treat the logic levels as stable once they satisfy the logic thresholds on page 3. After that you can continue the reset guidelines on page 16 to take the device out of reset.

Best regards,
Jeff McPherson

Audio

Audio forum

PCM4104: about FS1、FS0、FMT2、FMT1、FMT0、MUTE、DEM1、DEM0