Introduction - Nokia 6275 Baseband Description And Troubleshooting

6275/6275i (RM-154)
Baseband Description and Troubleshooting

Introduction

The 6275/6275i 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 (UEMEK IC),
which includes the audio circuits, charge control, and voltage regulators
• D2800 — Main 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
1150 mAh.
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