A PSOC (Programmable System-on-Chip) can be used to develop an energy meter by integrating analog and digital components on a single chip. The PSOC can interface with current and voltage sensors to measure energy consumption, process the data using an embedded processor, and communicate the results to a display or a network. By leveraging the flexibility of PSOC's programmable nature, the energy meter design can be customized and optimized for specific application requirements.
Psoc includes the analog and digital component where else in controller only digital. :P
PSoC devices are more user friendly than FPGA, But PSoC are limited in functionalities comparable to FPGA as FPGA can have any digital block but PSoC has some limited Digital blocks pre defined in the flash memory.FPGA requires VHDL and verilog to be programmed where as PSoC can be easily programmed just like any other ordinary microcontroller.PSoC surpassed the FPGA as PSoC now-a-days are containing almost all blocks that are usually needed and thus makes them more flexible than FPGA chips.