PIO is a set of coprocessors designed to offload signal processing. They have to be programmed. PSoC has FPGA like configuration capabilities, but rather than j

PIO is a set of coprocessors designed to offload signal processing. They have to be programmed. PSoC has FPGA like configuration capabilities, but rather than just logic gates it includes larger analog and digital ICs. You can route analog signal processing in and out without hitting a CPU and perform some FPGA like DSP driven by an arbitrary clock signal (also without any CPU usage).