MT6225 データシートの表示（PDF） - MediaTek Inc

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MT6225

GSM/GPRS Baseband Processor

MediaTek Inc 

MT6225 GSM/GPRS Baseband Processor Data Sheet Revision 1.00

1.4 General Description

Figure 2 details the block diagram of MT6225. Based on dual-processor architecture, the major processor of MT6225

is ARM7EJ-S, which mainly runs high-level GSM/GPRS protocol software as well as multi-media applications. With

the other one is a digital signal processor corresponding for handling the low-level MODEM as well as advanced audio

functions. Except for some mixed-signal circuitries, the other building blocks in MT6225 are connected to either the

microcontroller or the digital signal processor. Specifically, MT6225 consists of the following subsystems:

Microcontroller Unit (MCU) Subsystem, including an ARM7EJ-S RISC processor and its accompanying

memory management and interrupt handling logics.

Digital Signal Processor (DSP) Subsystem, including a DSP and its accompanying memory, memory

controller, and interrupt controller.

MCU/DSP Interface, where the MCU and the DSP exchange hardware and software information.

Microcontroller Peripherals, which include all user interface modules and RF control interface modules.

Microcontroller Coprocessors, which intend to run computing-intensive processes in place of Microcontroller.

DSP Peripherals, which are hardware accelerators for GSM/GPRS channel codec.

Multi-media Subsystem, which integrate several advanced accelerators to support multi-media applications.

Voice Front End, the data path of conveying analog speech from and to digital speech.

Audio Front End, also the data path of conveying stereo audio from stereo audio source

Baseband Front End, the data path of conveying digital signal from and to analog signal of RF modules.

Timing Generator, generating the control signals related to the TDMA frame timing.

Power, Reset and Clock subsystem, managing the power, reset and clock distribution inside MT6225.

Details of the individual subsystems and blocks are described in following Chapters.

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