Unused Inputs on the  EZ-USB FX1/FX2/FX2LP (CY7C64713, CY7C68013, CY7C68013A)

Question: Does the unused pins on the EZ-USB FX1/FX2/FX2LP (CY7C64713, CY7C68013, CY7C68013A) require pull up and pull down resistors, or can they be left floating?

 

Answer:

Unused pins should not be left unconnected (or floating). Instead, they should be connect to Vcc or Gnd through a ~10K resistor. If there's no chance that an unused pin will ever be configured as an output, then it is safe to tie the pin directly to the appropriate voltage (Vcc or Gnd) without the resistor.