In applications like server power supply, metering, and so forth. the system is desired to be run continuously to reduce downtime. But typically during firmware upgrades due to bug fixes, new features, and/or performance improvements, the system is removed from service causing downtime for associated entities as well. This can be handled with redundant modules but with increase in total system cost. An alternate approach, called Live Firmware Update (LFU), allows firmware to be updated while the system is still operating. Switching to new firmware can be done either with or without resetting the device, with the latter being more complex.