Motorola Solutions, Inc.

David Viviescas

Mark A Boerger

Mark Antilla

Yehuda Rokach

Chun P Leung

Kirk B Stuart

A battery operated portable communication device () provides improved power up of converged functionality managed by a power arbitration module (PAM) (), a baseband processor (BP) (), and an applications processor (AP) (). In response to a control switch () being turned on, the baseband processor generates a time delay and asserts a boot-line to the applications processor which prevents full power up of the applications processor and during which a battery impedance is read, thereby preventing simultaneous power up of the AP and BP. The boot-line from the baseband processor to the applications processor is released once the BP power up is complete and battery impedance is read.

Method and apparatus for managing power-up of a portable communication device

A system and method to determine a power-up parameter for a circuit board. The method includes electrically exciting a second-order circuit to generate an underdamped transient response. The method includes receiving, at a comparator coupled to the second-order circuit, the underdamped transient response. The method includes generating, in response to the underdamped transient response received at the comparator, a plurality of edges. The method includes receiving, at a single general purpose input/output pin of the electronic processor, the plurality of edges. The method includes determining a first response parameter based on a plurality of edges. The method includes determining a second response parameter based on the plurality of edges. The method includes determining the power-up parameter based on the first response parameter and the second response parameter.

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Doral, FL, United States of America

David Viviescas