Baseband System Module; Overview; Introduction: Phone Description - Nokia RM-761 Service Manual

RM-761; RM-799; RM-800
System Module

Baseband System Module

Overview

This section contains a brief overview of the key features of the Quantum engine, as well as overview
descriptions of implementation details.

Introduction: phone description

Quantum is a low cost dual band GSM/EDGE RX platform based on Infineon's X-GOLD213, containing RF
transceiver, baseband processor and power management unit on a single IC.
Physical:
• Low component count
• 4 layer PWB, single sided mounting
• PWB structure: 4 layers, 1+2+1 build-up with micro-via
Power:
• Support for Li-Ion batteries
• Support Nokia 2mm charging specification
• Intelligent charge control with temperature and over-current and over-voltage protection
Memory:
• Up to 512Mbit (2Gbit*) NOR flash with burst mode access
• Up to 256Mbit PSRAM
• 296KB internal SRAM
• 1.8V memory supply
• * (constrained by overall IO mapping)
Audio:
• 700mW Class-D amplifier for IHF speaker
• Stereo DC coupled headset outputs
• Polyphonic ringing
• FM radio with RDS
• Voice CODECs. FR, EFR, HR, NB-AMR
• SB-ADPCM CODEC for true tone
SIM:
• Support for both 1.8V and 3V SIM.
• SIM supplied by dedicated LDO
MMI:
• Parallel and serial LCD interface
• Vibrator driver output
• 6 x 5 matrix keyboard with detection of 2 keys simultaneously pressed
• Step up for Serial connected LED's for backlight of LCD and keyboard
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