Digital Block; Analog Block; Gsm Transceiver Block - Motorola G24 Developer's Manual

Architecture Overview
The G24 consists of the following blocks:

Digital Block

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Micro-controller Unit (MCU) for system and user code execution.
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Digital Signal Processor (DSP) for voice and data processing.
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Serial communications interfaces.
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Digital audio (PCM) bus interface.
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General purpose IO signals.

Analog Block

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Power Management IC (PMIC).
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Analog audio interface management.
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General purpose and dedicated A/D signals.
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Real Time Clock (RTC) subsystem.

GSM Transceiver Block

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RF power amplifier.
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RF receiver, which includes LNAs, Mixers, VCOs, I/Q outputs and buffers.
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Signal processing IC for transmit and receive GSM data processing.
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FEM - Front End Module.
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Filter - Quad-band SAW filter that selects the required receive band.
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USB driver interface
UART1
UART2
SPI - logger
SIM card
Internal regulators
1 external regulator for customer use
Speaker, microphone
Alert speaker
Headset
A/D
Voltage sensor
Temperature sensor
3 gain stages for the low GSM band and high GSM band
850/900/1800/1900 MHz
Includes a harmonic filter and antenna switch
Module Hardware Description January 1, 2006