PCM1862: Should I connect resistor to GPIO pins?

Are you not intending to use any GPIO for a specific function?

Hi Sanjay,

No. My customer doesn't have any plans to use GPIO pins for any specific functions.

Best regards,

Shunsuke Yamamoto

Hi Sanjay,

Are these GPIO pins CMOS inputs?

I'm sorry for asking after I pushed the solved button.

Best regards,

Shunsuke Yamamoto

Yes digital inputs are CMOS . 

Hi Sanjay,

Thank you for your reply. If GPIO pins of PCM1862 are CMOS inputs, GPIO pins are broken by overvoltage input of static electricity. Iassume we should connect these GPIO pins to GND or Vcc. Or are there internal pull-up or pull-down resistors?

Best regards,

Shunsuke Yamamoto 

The datasheet indicates an input current of 10ua at a logic level of High.

This may  be infered as an equicalent pin impedance of 3/10ua or 300k.

In general we have not really seen  reports of device failure with GPIO pins being open.

However if the customer desires they can configure the unused GPIO pins as outputs . This makes the pin low impedance.

Hi Sanjay,

Okay, It is good to know.

Are these pins CMOS GPIO pins? or TTL level pins?

Best regards,

Shunsuke Yamamoto

CMOS