Technical information

Architecture Overview
8 G24-L Module Hardware Description November 15, 2008
The G24-L consists of the following blocks:
Digital Block
• Micro-controller Unit (MCU) for system and user code execution.
• Digital Signal Processor (DSP) for voice and data processing.
• Serial communications interfaces.
• USB driver interface
• UART
• SIM card
• Digital audio (PCM) bus interface.
• General purpose IO signals.
Analog Block
• Power Management IC (PMIC).
• Internal regulators
• 1 external regulator for customer use
• Analog audio interface management.
• Speaker, microphone
• Alert speaker
• Headset
• Real Time Clock (RTC) subsystem.
GSM Transceiver Block
• RF power amplifier.
• 3 gain stages for the low GSM band and high GSM band
• 850/900/1800/1900 MHz
• RF receiver is integrated in the MCU and processed by the DSP.
• Signal processing IC for transmit and receive GSM data processing.
• FEM - Front End Module.
• Includes a harmonic filter and antenna switch
• Filter - Quad-band SAW filter that selects the required receive band.