System Overview
The MT6225 is a highly integrated single chip solution for GSM/GPRS phone. Based on 32-bit ARM7EJ-S^TM RISC processor, MT6225 features not only high performance GPRS Class 12 MODEM but is also designed with support for the wireless multi-media applications, such as advanced display engine, synthesis audio with 64-tone polyphony, digital audio playback, Java acceleration,
MMS and etc. Additionally, MT6225 provides varieties of advanced interfaces for functionality extensions, like 3-port external memory interface, 3-port 8/16-bit parallel interface, NAND Flash, IrDA, USB and MMC/SD/MS/MS Pro. The typical application can be shown as Figure1.

Platform Feature
General
  Integrated voice-band, audio-band and base-band analog front ends
  TFBGA 12mm×12mm, 264-ball, 0.65 mm pitch package
MCU Subsystem
  ARM7EJ-S 32-bit RISC processor
  High performance multi-layer AMBA bus
  Java hardware acceleration for fast Java-based games and applets
  ARM7EJ-S Operating frequency: 26/52/104 MHz
  Dedicated DMA bus
  14 DMA channels
  48K Bytes on-chip SRAM
  72K Bytes MCU dedicated Tightly Coupled Memory
  16K Bytes Code cache
  On-chip boot ROM for Factory Flash Programming
  Watchdog timer for system crash recovery
  2 sets of General Purpose Timer
  Circuit Switch Data coprocessor
  Division coprocessor