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?



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.