Methods and systems for detecting and for responding to connection of a battery to a logic device

US6487670B1 · kind B1 · utility

Assignee

• Motorola, Inc. · US

Inventors

• Greg A. Racino · Austin, US
• Michael Charles WOOD · Pflugerville, US
• James R. Feddeler · Austin, US
• George E. Baker · Austin, US
• Edward M. Stellini · Austin, US
• Linda R. Nuckolls · Austin, US
• Timothy E. Barnard · Austin, US

Key dates

• Filing date: Mar 2, 1999
• Grant date: Nov 26, 2002
• Expiry date: Mar 2, 2019

Classification

• Technology area (CPC G): Physics
• CPC primary: G06F1/26
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A system comprising a supply voltage isolation module (50), and a battery detector (52), both responsive to a battery pin (41). The system further including a voltage detection module (54) responsive to a voltage supply pin (42), where the voltage detection module (54) compares a supply voltage from the voltage supply pin (42) to a threshold. The system also including control logic (56) responsive to the battery detector (52) and the voltage detection module (54). Also disclosed are methods for responding to connection of a battery (36) to a logic device (12), placing a logic device (12) into a low power state in response to connection of a battery (36) to the logic device (12), and detecting a battery condition for a logic device (12) having a battery pin (41).