With the three major international 3G standards (TD-SCDMA, WCDMA and CDMA2000) landing in China, a huge industrial chain with operators as the core has been formed. After a period of development, the industrial structure of China's 3G communication era has taken shape. At the same time, China's mobile TV CMMB industry has also developed rapidly. The network construction and the maturity of the industrial chain have made CMMB the largest mobile TV network in the world, and the industrial development has taken shape. In March 2010, China Mobile Group announced that it will launch a commercial business integrating the development of TD-SCDMA and CMMB, laying a solid foundation for maximizing the development of independent intellectual property rights.
In order to support the industrialization of China's independent intellectual property rights, Spreadtrum Communications Co., Ltd. (hereinafter referred to as "Exhibition") is fully committed to research and development of related products and solutions to promote the rapid development of China's communications industry and broadcast television industry. The Time Division Synchronous Code Division Multiple Access (TD-SCDMA) system is the third generation mobile communication standard for China's independent intellectual property rights promulgated by the International Telecommunication Union (ITU) as an international standard. In 2004, Spreadtrum began to launch the industry's first commercial TD-SCDMA/GSM/GPRS multimode communication baseband chip SC8800 series. China Mobile Digital Multimedia Broadcasting (CMMB) is an independent intellectual property mobile multimedia broadcasting standard promulgated by the State Administration of Radio, Film and Television as an industry standard. In May 2008, Spreadtrum launched the industry's first CMMB standard mobile TV single chip SC6600V. In addition, Spreadtrum released the world's first communication RF chip supporting TD-SCDMA/GSM/GPRS/HSDPA at the 3GSM World Congress in 2009. The 3G mobile TV solution based on Spreadtrum's TD-SCDMA mobile phone baseband chip SC8800, CMMB mobile multimedia chip SC6600V and multimode communication RF chip QS3200 not only has the advantages of full-featured, low-cost and Turn Key solutions, but also can be developed to support China. Product solutions for independent intellectual property standards.
Highly integrated, full-featured, low-power communication multimedia TD-SCDMA mobile baseband chipAt present, 3G mobile phone solutions supporting TD-SCDMA are mostly implemented with 5 to 6 core chips. The problems of low integration, large power consumption, and large product area have caused great confusion to terminal manufacturers. From the solution of the TD-SCDMA communication module, many solutions need to use a TD-SCDMA baseband chip and a TD-SCDMA RF chip, and also need a GSM/GPRS baseband chip and a GSM/GPRS RF chip. To achieve; from the solution of the multimedia processing module, some solutions still need to add a dedicated multimedia processing (such as MP3\MP4) coprocessor chip to achieve basic multimedia functions. The SC8800 is the industry's first highly integrated chip that integrates TD-SCDMA baseband processing and GSM/GPRS baseband processing and multimedia processing core functions to achieve a 3G functional handset solution. The SC8800 supports HSDPA/TD-SCDMA/GSM/GPRS/EDGE multi-mode baseband processing and supports HSDPA high-speed download.
The functional structure of the SC8800 is shown in Figure 1. The SC8800 is functionally divided into a HSDPA/TD-SCDMA/GSM/GPRS/EDGE multimode baseband processing unit, a multimedia processing unit, a power management unit, and a rich universal peripheral interface (including external memory controllers and displays). Controllers, etc.), each functional module has a modular design, modular design makes the entire chip with very good reliability and flexibility. The main features of this chip are as follows:
Multimode communication baseband processing: The SC8800 chip supports the HSDPA/TD-SCDMA/GSM/GPRS/EDGE standard, and supports the quad-band GSM850/EGSM900/DCS1800/PCS1900 and EGPRS Class12 in the 2G standard. Supports the TD-SCDMA standard (3GPP Release 5) in terms of 3G standards, and supports three standard frequency bands: F-band (1880-1900MHz), A-band (2010-2025MHz) and E-band (2320-2370MHz). The communication module fully supports the technical specifications of China Mobile's 2G and 3G convergence.
Powerful multimedia: SC8800 chip has powerful multimedia processing capabilities, embedded video processor for video encoding and decoding processing, and increased multimedia hardware accelerator to enhance image processing capabilities, such as support for MPEG4 playback 25fps. The audio aspect supports multiple formats of codec, such as decoding of MP3/AAC/AAC+ music formats and processing of polyphonic ringtones, which can handle the decoding and playback of common audio sources, and the stereo output also adds a lot to the multimedia processing module. In particular, the built-in 2 megapixel digital camera controller can be directly connected to a digital CMOS image sensor for camera and camera functions.
Comprehensive LCD screen support: SC8800 supports WQVGA resolution (400x240), such as 2.0-inch, 2.4-inch, 2.8-inch, 3.0-inch and 3.2-inch LCD screens, and supports dual color screens, and integrates LCD controller and The touch screen controller allows customers to choose a more extensive type of screen and define more forms of products.
Cost-effective memory support: The SC8800 has a built-in Nandflash controller and SDRAM/DDR controller, supports NAND booTIng, and supports mainstream models of NAND+SDRAM MCP. The NAND FLASH power supply voltage configuration is flexible. Before the system is powered on, it can be configured through STRAPPING, which can be configured to 1.8, 2.65, 2.8, 3.0V. The power supply is also designed reasonably, using a 2.65V power supply to power the NAND FLASH, and a 1.8V power supply to the SDRAM. NAND FLASH and SDRAM are directly connected to the NAND interface and SDRAM interface of the SC8800 chip. According to needs and market conditions, Memory can choose the most cost-effective MCP (such as 1Gb/512Mb or 512b/256Mb, etc.).
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