CY8C6347FMI 1.8V and 3.3V domain without level shifters?

[SergioUno]

Hi, 

I have CY8C6347FMI system and I need to communicate with ICs in both 3.3V and 1.8V domains. Can I do it without level shifters, just by providing diffenet  voltages to two different IO domains?

[SergioUno]

There are several power domains in PSo6, if I for example connect VDDIO1  to an external 1.8V LDO and the other pins will be connected to 3.3V, will I have 1.8V levels on I/O ports P5, P6, P7, P8 and 3.3V on the others? Sorry, I don't have a hardware to check it for now. 

[RodolfoGL · Accepted solution]

Yes, you don't need external level shifters. You can leverage the power domains the PSoC 6 provides.