Now that the tool flow has been verified the custom application code can be written. All of the peripherals can be set up and the application code written targeting the C8051F34A device. This enables the user to make changes and test the code without the penalty of wasted devices. The flow shown for the flash devices shows a single MCU being used for many iterations of code. The OTP flow shows that if the code did not work and reprogramming were necessary, users would have to discard the MCU. By using the flash-based MCU, the development time and costs are significantly reduced.