User Guide

NEM-2

System Module and User Interface CCS Technical Documentation

Supply Voltage Distribution

The energy management of NEM-2 is based on DCT4 architecture and additional compo-

nents for Audio Player power supply. A semi fixed battery supplies the DCT4 Phone part

and the Audio Player part.

UEMK includes several regulators to supply DCT4 Phone RF and baseband. It provides the

energy management including power up and down procedure.

Additional regulators are included for Audio Player supply. These regulators are con-

trolled by UPP GenIO pin.

If the main battery is not present, a backup battery supplies the Real Time Clock (RTC)

part of UEMK. RTC inside ADSP is not supported and powered down permanently.

Figure below shows NEM-2 supply voltage distribution diagram.

Figure 5: NEM-2 Supply Voltage Distribution Diagram

GenIO22

DCT4 Phone Baseband

(UPP, Flash, RF)

enable

backup

battery

main battery

Audio Player Baseband

(DA250, Flash, codec,

amp., MMC, USB)

Audio Player Power SupplyDCT4 Phone Power

Supply (UEM)

charger

control

power

power key

RTC