Pin detailed information on ADAU1452

Hello Yuta,

I will attach the information that I have.

For the reset state, pins that are inputs or are outputs will continue to be inputs or outputs when the part is held in reset. For the digital pins that are bidirectional, they will be tri-stated when held in reset.

For the pullup/down resistors. They have a minimum value of around 100K ohms. Our simulations show it as a min of 105k ohms over process skews, temperatures, and power supply ranges. These resistors will not be very precise, they will vary greatly from part to part. They are meant to be a weak pull resistor so accuracy is not important.

Dave T

I noticed four pins in your spreadsheet appear to be in disagreement with the default pin configuration as reported by the ADAU145x when queried immediately after reset: pins 28-31 have their pull-up disabled according to their config registers (f79d,f79e,f79a,f799) while your spreadsheet lists them as enabled.

Here is my own spreadsheet (various sort orders available via Data -> Filter views)

Hello matthijs,

I sat down with the designer and looked through the digital code for the part. I corrected my spreadsheet. I was also able to confirm that there is no difference between reset and the default state with no program loaded. As soon as the reset pin is lowered, the part loads in the default state for all pins.

XLSX

Dave T