The UDB UARTS obviously need UDBs. So you have less of them left for other stuff (e.g. LUTs, PWMs or simple logic). With regards of power, you will need to look at the data sheets. Maybe there is something in there. But I guess it doesn't make a difference.
The SCB UART uses a fixed-function implementation. This doesn't use any digital block (UDBs), is assigned to fixed pins, and lacks some features. The UDB version is more versatile, its ouputs can be routed, but it needs more resources.
Thanks for the answer. Can you also specify which "more ressources" are needed? Do you mean energy consumption for the subunit or processing time in the MCU? I am looking specifically for a low power solution to communicate between PSoC 4 and another MCU, would you therefore recommend the SCB UART or is it lacking essential features for this purpose?
The UDB UARTS obviously need UDBs. So you have less of them left for other stuff (e.g. LUTs, PWMs or simple logic). With regards of power, you will need to look at the data sheets. Maybe there is something in there. But I guess it doesn't make a difference.
