User Guide

NHM-10 Company Confidential

7 - Baseband CCS Technical Documentation

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too low (below UEM master reset threshold) and back-up battery voltage is too

low.

• In BACK_UP mode the main battery is not present or its voltage is too low but

back-up battery has sufficient charge in it.

• In PWR_OFF mode the main battery is present and its voltage is over UEM

master reset threshold. All regulators are disabled.

• RESET mode is a synonym for start-up sequence and contains in fact several

modes. In this mode regulators and oscillators are enabled and after they have

stabilized system reset is released and PWR_ON mode entered.

• In PWR_ON mode SW is running and controlling the system.

• SLEEP mode is entered from PWR_ON mode when the system’s activity is

low (SLEEPX controlled by SW).

• FLASHING mode is for production SW download.

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