Vih and Vil levels for 3.3V and 5V operation of PSoC1

Question: Are digital input voltages the same at for Vdd of 3.3V and 5V?

 

Answer:

Yes, it is same for both for both the operating voltages. The Vih and Vil levels are 2.1V and 0.8V respectively. These are CMOS inputs but they are TTL compatible.