Hi there,
The word on the Street is 
They are current limit resistors for Inputs, jic the user wants to use a Higher VCC. or just limit syncing /sourcing current from/to the input.
HTH
GL 
PJ 
Hi there,
The word on the Street is They are current limit resistors for Inputs, jic the user wants to use a Higher VCC. or just limit syncing /sourcing current from/to the input.
HTH
GL PJ