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3.1.1 System Overview
MT6235 is a highly-integrated and extremely powerful single-chip solution for
GSM/GPRS/EDGE mobile phones.
Based on the 32-bit ARM926EJ-STM RISC processor, MT6235’s superb processing power,
along with high bandwidth architecture and dedicated hardware support, provides an
unprecedented platform for high performance GPRS/EDGE Class 12 MODEM application.
Overall, MT6235 presents a revolutionary platform for mobile
devices.
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Platform
MT6235 is capable of running the ARM926EJ-STM RISC processor at up to 208 MHz, thus
providing fast data processing capabilities. In addition to the high clock frequency, separate
CODE and DATA caches are also included to further improve the overall system efficiency.
For large amounts of data transfer, high performance DMA (Direct Memory Access) with
hardware flow control is implemented, which greatly enhances the data movement speed while
reducing MCU processing load.
Targeted as a high performance platform for mobile applications, hardware flash content
protection is also provided to prevent unauthorized porting of the software load to protect the
manufacturer’s development investment.
Memory
To provide the greatest capacity for expansion and maximum bandwidth for data intensive
applications such as multimedia features, MT6235 supports up to 4 external state-of-the-art
devices through its 8/16-bit host interface.High performance devices such as Mobile SDRAM and
Cellular RAM are supported for maximum bandwidth.Traditional devices such as burst/page
mode flash, page mode SRAM, and Pseudo SRAM are also supported. For greatest compatibility,
the memory interface can also be used to connect to legacy devices such as Color/Parallel LCD,
and multi-media companion chips are all supported through this interface. To minimize power
consumption and ensure low noise, this interface is designed for flexible
I/O voltage and allows lowering of the supply voltage down to 1.8V. The driving strength is
configurable for signal integrity adjustment.
Multi-media
The MT6235 multi-media subsystem provides a connection to a CMOS image sensor and
supports a resolution up to 2.0 Mpixels. With its high performance application platform, MT6235
allows efficient processing of image and video data.
In addition to image and video features, MT6235 utilizes high resolution DAC, digital audio, and
audio synthesis technology to provide superior audio features for all future multi-media needs.
Connectivity and Storage
To take advantage of its incredible multimedia strengths, MT6235 incorporates myriads of
advanced connectivity and storage options for data storage and communication. MT6235
supports UART, Fast IrDA, USB 2.0, SDIO,Bluetooth, Touch Screen Controller, WIFI Interface,
and MMC/SD/MS/MS Pro storage systems. These interfaces provide MT6235 users with the
highest degree of flexibility in implementing solutions suitable for the targeted application.
To achieve a complete user interface, MT6235 also brings together all the necessary
peripheral blocks for a multi-media GSM/GPRS/EDGE phone. The peripheral blocks include the
Keypad Scanner with the capability to detect multiple key presses, SIM Controller, Alerter, Real
Time Clock, PWM, Serial LCD Controller, and General Purpose Programmable I/Os.
Furthermore, to provide much better configurability and bandwidth for multi-media products, an
additional 18-bit parallel interface is incorporated. This interface enables connection to LCD
panels as well as NAND flash devices for additional multi-media data storage.
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