if MCF52259 enter a reset state, its datasheet said "All signals have a pull-up in GPIO mode". my question is: what the resistor value is?
> what the resistor value is?
That isn't in the Reference Manual. It is an electrical characteristic of the chip, so it is in the Data Sheet.
Specifically "Table 13. DC Electrical Specifications":
Weak internal pull Up device current, tested at VIL Max. -10 to -130 uA.
The "pullup" may not be a linear resistor, but may be a current source. Given the above currents, it is somewhere between 25k and 330k measured to ground.
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