Introduction - If you have any usage issues, please Google them yourself
The T400u controller is an implementation of National s 4-bit COP400 microcontroller family architecture. It is intended to be used as a
replacement for the original chip in SOCs recreating legacy systems.
Its final target is to provide design variants that are compatible with the
COP420/421 and COP410L/411L family members. All of them derived from the
common t400_core design.