iCE40 LP: How to calculate the internal pull up resistor value of an iCE40 LP 1K device?
Current rating for VCCIO 3.3 from data sheet (Min 11uA Max128uA)
For LVCMOS33 -> Vih(min) is 2.0V Hence Rp = 3.3V - 2.0V / (11uA) = 18.18K Ohm
For LVCMOS33 -> Vih(min) is 2.0V Hence Rp = 3.3V - 2.0V / (128uA) = 10.15K Ohm