Running a 5v PSoC at 3.3v | Cypress Semiconductor
Running a 5v PSoC at 3.3v
I've been trying to get into contact with a Cypress engineer, but 2 hours on the phone system got me nowhere, so I'm posting this here.
I've been fooling around with a system that utilizes three CY8C29466-12PVXET PSoC1's running at 5v. I didn't handle the programming for that system, so I don't know exactly how the chip's resources are being utilized, but I ran the system with a 3.3v supply for unrelated reasons and noticed that they were still functioning perfectly.
I'm guessing that the M8C core runs on 3.3v internally anyways, and that that particular design did not make much use of any of the configurable blocks, which probably require the 5v supply.
Is there any validity to running these 29466's at 3.3v? I'd also like to know (if this is even possible) what effect lower voltages would have on their operation up near their max operating temperature at 125C.