I/O port of ADUC7021

Hello,

I use pin 3 of port 1 (P1.3) on my products and at power up, the port is in high impedance, everything is ok.

Now we received a new reel of aduc7021 and this port (pin 1.3) now emit a glitch at power_up : 2V during 17ms with a pull down of 68Kohm.

My application doesn't work now!

Do you have changed something? Is there is a solution?

Thanks,

Parents
  • On previous and new devices the markings is the same I31.

    I had a NMOS transistor to drive this PIN and the leakage current must be enough to pull down this PIN.

    The NMOS is drived through P1.3, if I deasable the Pull-up in the GP1PAR register does it change the port At power-up?

Reply
  • On previous and new devices the markings is the same I31.

    I had a NMOS transistor to drive this PIN and the leakage current must be enough to pull down this PIN.

    The NMOS is drived through P1.3, if I deasable the Pull-up in the GP1PAR register does it change the port At power-up?

Children
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