Wolfson Microelectronics Limited

Abhay Kejriwal

Holger Haiplik

Grant M More

Apparatus and method for power management and especially to power management integrated circuits (PMICs). In one aspect, the invention relates to a PMIC having an internal non-volatile memory (NVM) for storing boot settings for the PMIC. The PMIC also has control circuitry for detecting whether a source of boot settings is available, such as an NVM external to the PMIC, and, if so, using any settings stored in the external source in preference to the relevant settings stored in the internal NVM. The external settings can thus override any internal settings, which is useful for fault diagnosis and/or development. In one aspect the PMIC may have programming circuitry for automatically programming boot settings from an external source into the internal NVM.

Power management apparatus and methods

A circuit for debouncing a signal from a switch or other input. The invention provides an arrangement which receives an input signal and which monitors the input to provide an output which switches after a predetermined time from the input signal changing from one state to another. However, the output changes back to its original state in a much shorter time if said input changes back to its original state.

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Swindon, United Kingdom

Abhay Kejriwal