MPC5777c Configuration for Default Analog Pin / Unused Analog pin

[Hawkeyedman]

Hello

I am using MPC5777c.

What state should I leave unused analog pins in?

I can't use Pulldown/Pullup external resistor.

Bcz my project's artwork was fixed.

So I have to make Default Analog Pin or Unused Analog Pin Pull-down

( I know I need to make it pull down. If not please let me know)

How to make Analog Pin Pull down state in Source Code?  

Please educated me

Thanks.

#mpc5777c #Analog pin #default pin

#Configuration

[petervlna]

Hello,

Have a look at reference manual:

Best regards,

Peter

[Hawkeyedman]

Thanks for reply.

Our Hardware doesn't have pull down or pull up resistor of adc channel.

In this case, Just leave unused analog pins leave default condition( ex, floating..)?

And I found Handling unused pins from AN5268: MPC5777C Hardware Requirements/Example Circuits

In the Below picture, Unused analog pins they be pulled down to VSSA.

I knew VSSA pin is power pin.

So I think It means Unused analog pins they be pulled down to VSSA with pull down resistor.

If I misunderstand, please let me know and enlighten me.

[petervlna]

Hello,

You can use internal pull function of the pads. However have in mind that this will be active after write to the PCR register, so time from power on to config of pad will not be covered by it.

Best regards,

Peter

[Hawkeyedman]

Thanks peter

I think you taught me about digital pin (GPIO) configuration.

In the Reference Manual of Mpc5777c, There is no Analog Pin's (ANA0~ANA39) PCR Registers.

I would be grateful if you could teach me.