Attiny85 using Arduino IDE, pull-up resistor voltage is too low

Other Hardware 3rd Party Boards
6

Yes, I used

DDRB = 0;
PORTB = B000001;

and got the same result of measuring 1.77 V at PB0.

Ahhhhh!

The code is just the two lines in setup:

void setup()
{
pinMode(0, INPUT); //pushbutton
digitalWrite(0, HIGH);
}
void loop()
{

}