Changes
/* Formula */
* Resitor Pull-Up MAX :
<math>
R_{Pull-UpUp_{max}} = \frac{VDD - VDD_{low}}{I_L} = \frac{3.3 - 0.66}{2u}
</math>
= ''' 1.32 Mohms'''
''Remark'' : the resistor must be more less that the R_PULL-UP_max - usually, the value of 10kohm is using for the resistor pull-up.
* Current using when the switch is closed
<math>
I_{R_{Pull-Up}} = \frac{VDD - VDD_{low}}{R_{Pull-up}} = \frac{3.3 - 0.66}{10k}
</math>
= ''' 264 uA'''
= Layout =
