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| 博通 BCM7325单片 STB解决方案 | |||||
作者：博通 文章来源：博通 点击数： 更新时间：2008-3-4  |
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BCM7325 High-Definition Satellite System-on-Chip with Integrated DVB-S2 The BCM7325 is Broadcom’s next-generation satellite set-top box system on a single chip in 65-nm process. It integrates a single tuner/ demodulator from the BCM4506 front-end technology and the latest generation of AVC decoder that supports multiple video formats. The BCM7325 supports worldwide standards for DBS transmission systems based on DVB-S2, 8PSK, and is backward compatible with the DVB-S standards. The BCM7325 operates on a dual-threaded MIPS CPU core running at 333-MHz and yielding over 600 DMIPS in performance. The BCM7325 is designed to support UMA and non-UMA memory architectures, utilizing a 400-MHz clock, 32-bit wide Double Data Rate (DDR2) memory I/F for enhanced performance and allows cost-effective memory solutions. The BCM7325 is a true single chip that can decode transport streams delivered via the integrated DBS front end. In addition, it is capable of decoding external TS input from 10/100 Ethernet ports. Several interfaces required for TV output are integrated on chip including the HDMI, baseband composite, component, or S-Video. An RF channel 3/ 4 modulated output is also integrated on-chip. An HD video encoder with copy protection that supports NTSC, PAL, and SECAM with simultaneous SD output and optional Macrovision/DCS support is integrated on chip. The BCM7325 incorporates Broadcom’s advanced 2D graphics engine, offering true studio-quality text and graphics with efficient use of memory and bandwidth. A full range of peripheral devices is supported on the BCM7325, including UARTs, dual ISO7816 smart card interfaces, GPIO, counters/ timers, IR Tx/Rx, UHF Rx, I2C, and SPI controllers. 主要特性： Integrated wide-band silicon tuner with DiSEqC 2.x and programmable FSK transceiver Integrated demods DVB-S2 8PSK Demod QPSK demod (market-dependant) AVC-compliant video decoder for MPEG-4 Parts 2 and 10, MPEG-2, VC-1, ATSC, DivX, Xvid Programmable decoder supports multiple formats including MPEG Layers 1 and 2, AC3, AAC, PCM Audio Multi-threaded MIPS CPU 350 MHz, 32-KB I/D, 128-KB L2 MMU and FPU support, EJTAG debug interface 400-MHz Clock (800-MHz Data) rate DDR2 memory configurable in UMA and non-UMA modes NAND/NOR flash support Rich 2D graphics based on Broadcom® Graphics Engine 10/100 Ethernet with PHY and MII Dual USB 2.0 ports On-chip Security Processor Low cost DVB-CI support 主要优势： Provides a cost-effective single-chip solution for high-definition Direct Broadcast Satellite (DBS) applications. Based on field-proven and production-ready subsystems offering energy-efficient performance. Feature-rich, fully integrated SoC reduces the external components needed and reduces PCB real-estate. Allows cost-effective DDR2-based memory with support for UMA and non-UMA modes. •Advanced 2D-graphics system allows a variety of applications to deliver studio-quality text and graphics on television screens. Broadcom-developed device drivers enable rapid software development cycles with support of industry-standard operation systems. Industry-leading third party operating systems, toolchains and middleware supported. 65 nm process technology offers low power and lower cost.  图1。BCM7325单片系统方框图  图2。BCM7325参考设计方框图 |
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