Default pin states, and pinMode( <pin>, INPUT_PULLUP)

hi, i'm little confused how input_pullup used.

when atmel micro resets, pullup resistors apparently globally , individually enabled, right?

if so, assume that:

pinmode( <pin> input )
creates typical high-impedance digital input no pullup resistor, , therefore

pinmode( <pin> input_pullup )
ensures pullup resistor enabled.

please tell me if i'm wrong of above, thankyou.

matt

quote

when atmel micro resets, pullup resistors apparently globally , individually enabled, right?

on reset, pins input pullup resistors turned off.

quote

if so, assume that:

pinmode( <pin> input )
creates typical high-impedance digital input no pullup resistor, , therefore

pinmode( <pin> input_pullup )
ensures pullup resistor enabled.

yes. if use commas , semicolons, is. 

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