Abstract: Examples of the disclosure include a bootloader system including a volatile memory, a first non-volatile memory configured to store a first bootloader, a second non-volatile memory configured to store a second bootloader, and a microprocessor configured to control, responsive to executing the first bootloader, the volatile memory to receive an updated second bootloader and provide the updated second bootloader to the second non-volatile memory, and control the second non-volatile memory to update the second bootloader with the updated second bootloader.

Abstract: According to one aspect, embodiments of the invention provide a power circuit comprising an input to receive input AC power from an AC source, an auxiliary charger configured to convert the input AC power from the input into DC power, a differential amplifier configured to be powered by the DC power from the auxiliary charger, to monitor the input AC voltage level of the input AC power, and to generate a sense signal based on a status of the input AC voltage level, and a processor coupled to the auxiliary charger and the differential amplifier, the processor configured to be coupled to an LPS, to be powered into a low power mode by the DC power from the auxiliary charger, and to analyze the sense signal from the differential amplifier in the low power mode of operation. According to one embodiment, the auxiliary charger is an offline DC-DC converter.

Abstract: Devices include a processor and a memory. The processor is configured to determine if a bootloader area does not contain a valid bootloader instruction set, to locate a bootloader instruction set, and to copy the bootloader instruction set to the bootloader area. The processor then executes the bootloader instruction set from the bootloader area.

Abstract: According to one aspect, embodiments of the invention provide a power circuit comprising an input to receive input AC power from an AC source, an auxiliary charger configured to convert the input AC power from the input into DC power, a differential amplifier configured to be powered by the DC power from the auxiliary charger, to monitor the input AC voltage level of the input AC power, and to generate a sense signal based on a status of the input AC voltage level, and a processor coupled to the auxiliary charger and the differential amplifier, the processor configured to be coupled to an LPS, to be powered into a low power mode by the DC power from the auxiliary charger, and to analyze the sense signal from the differential amplifier in the low power mode of operation. According to one embodiment, the auxiliary charger is an offline DC-DC converter.

Abstract: Devices include a processor and a memory. The processor is configured to determine if a bootloader area does not contain a valid bootloader instruction set, to locate a bootloader instruction set, and to copy the bootloader instruction set to the bootloader area. The processor then executes the bootloader instruction set from the bootloader area.

Abstract: A bicycle ratchet hub assembly includes a ratchet unit and a damping unit located between the hub and the socket unit. The ratchet unit has a ratchet ring in the hub. Multiple recesses are defined in the seat and each have a pawl pivotably located therein. The damping unit is located between the axle and the hub, and includes a damping member which has slots defined therein. A pin protrudes from each of the pawls and movably extends through the corresponding slot. By the damping feature of the damping member, the damping member delays a period of time to begin to rotate, and the pins of the pawls move in the slots and the pawls are pivoted outward to be engaged with the ratchet teeth of the ratchet unit without using any resilient part. A magnetic driving device located in the hub to attract the pawls to be pivoted outward.