MT6252 简介 - 硬件和射频工程师.DOC

MT6252 简介 MT6252 is a GSM/GPRS handset chip solution which integrates RF, analog baseband, digital baseband as well as Power?Management Unit (PMU) and can greatly reduce the component count and make a smaller PCB size. Besides, MT6252 is?capable of Single Antenna Interference Cancellation (SAIC) and AMR speech. Based on a 32-bit ARM7EJ-STM RISC?processor, MT6252 provides an unprecedented platform with high quality modem performance.? Platform MT6252 has the ARM7EJ-STM RISC processor running?at up to 104 MHz, which provides best trade-off between system performance and power consumption. For large amount of data transfer, high performance?Direct Memory Access (DMA) is implemented, which?greatly enhances the data movement speed while?reducing MCU processing load. Memory MT6252 supports serial Flash interface with various?operating frequencies. Multimedia MT6252 multimedia system contains many hardware?accelerators to enrich user experience, including the?camera interface, display controller/resizer/rotator, etc. MT6252 utilizes high resolution audio DAC, digital?audio, and audio synthesis technology to provide?superior audio features; e.g. MP3 ring tones. Connectivity and Storage MT6252 supports UART as well as a Bluetooth?interface. Also, it is embedded with necessary?peripheral blocks: keypad scanner with the capability to?detect the multiple key presses, multiple-SIM controller,?real time clock, PWM, LCD controller, USB 1.1 FS/LS,?MMC/SD and general purpose programmable I/Os.? MT6252 supports USB download with battery. Audio Using a highly integrated mixed-signal Audio?Front-End architecture, MT6252 allows easy audio?interfacing with direct connection to the audio?transducers. The audio interface integrates D/A and?A/D converters for the voice band, as well as high?resolution stereo D/A converters for the audio band. In?addition, MT6252 provides stereo input and analog?mux, and supports the AMR codec to optimize speech?and audio quality. The 700 mW class-AB amplifi