Hi,
I was wondering what would happen in the cases where the BCLK or GPIO inputs were left floating/had no driving sources?
Thank you,
Matthew Bavier
Hey Matthew,
The GPIO pins can be configured as a floating or disabled pin if it is not in use according to the DS:
The BCLK in cooperation with the FSYNC is important to the ASI bus getting the correct data out, if left floating/unused, the datasheet does not account for the output data expected in this case but it doesn't necessarily mean other features not dependent on the ASI bus would not function.
Hope that answered your question.
Regards,
Ore.
Hey Matthew,
The GPIO, GPI and GPO pin can be driven to any of the supported states desired (hi,lo,float) and can be configured to support any of the features in the table below, including PDMDIN.
The pin that houses the GPI and PDMDIN features can be configured to support either of these features and more. Look to the tables provided in this thread for more info.
One final question that came up is if the device is acting as a peripheral (BCLK and FSYNC are inputs) and these inputs are floating, could it lead to any damage to the IC or increase IC consumption?
If these pins are left floating, the IC should still be able to function, just recall, these pins affect the ASI bus.
Regards,
Ore.
