Introduction - Nokia 3155i Troubleshooting Manual

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Introduction

The 3155/3155i/3152 baseband module is a tri-mode, Code Division Multiple Access
(CDMA), dual-band engine and is based on the DCT4.5 standard. The baseband engine
includes two major Application Specific Integrated Circuits (ASICs):
• D2200 — Universal Energy Management Enhanced Integrated Circuit (UEME IC),
which includes the audio circuits, charge control, and voltage regulators
• D2800 — Main phone processor, which includes system logic for CDMA, two
Digital Signal Processors (DSPs), the Main Control Unit (MCU), and the memory
The BL-6C Li-ion battery is used as the main power source and has a nominal capacity of
1070 mAh.
Even though the Bluetooth, Camera, Camera flash, External Display and MMC
components are on the ASICs, they are not used in the 3155/3155i/3152 baseband
module.
ISSUE 1 07/2005
©2005 Nokia Corporation
3155/3155i (RM-41), 3152 (RM-61)
Baseband Description and Troubleshooting
Company Confidential Page 5