B4R Question Mega analog-pin pull up

[Mostez]

Hello,
I want to use analog pins A8 and A9 on aruino Mega for digital input, I declared both pins in input pull up mode. A9 works ok, but I get no response at all from A8. any ideas?

DoorOpenButton.Initialize(62,DoorOpenButton.MODE_INPUT_PULLUP) 'A8
    DoorSensor.Initialize(63,DoorSensor.MODE_INPUT_PULLUP) 'A9
    DoorOpenButton.AddListener("DoorOpenButton_Changed")
    DoorSensor.AddListener("DoorSensor_Changed")

private Sub DoorOpenButton_Changed (Status As Boolean)
    Log (Status) 'no response at all
    If Status = False Then UnLockDoor
End Sub
   
private Sub DoorSensor_Changed (Status As Boolean)
    If Status = False Then
        DoorSensorON = True 'door opened
    Else
        DoorSensorON = False 'door closed
        LockDoor
    End If
End Sub

 

[Erel]

Does it work with other pins (A7 for example)?

 

[Mostez]

it works with A14,A15, the problem is I have to reconfigure pins assignment again, i wonder if A8 has internal pull up! or damaged?

 

[Erel]

Based on the documentation all pins have an internal pull up resistor: https://www.arduino.cc/en/Main/arduinoBoardMega

 

[Mostez]

thanks Erel, it seems that this pin is damaged