器件名称:
AM79C850
功能描述:
SUPERNET-R 3
文件大小:
334.43KB 共97页
简 介:
PRELIMINARY Am79C850 SUPERNET 3 DISTINCTIVE CHARACTERISTICS s Compliant with the ANSI X3T9.5/ISO 9314 Advanced Micro Devices s ANSI-compliant TP-PMD Stream Cipher specification — 100 Mbps data rate — Timed token-passing protocol — Ring topology s Complete memory management — Supports 256K bytes of local frame buffer memory — Supports buffer memory bandwidths of 200 Mbps and 400 Mbps — Tag-Mode: minimum latency/highest performance buffer memory management, ideal for adapter card designs Scrambling/Descrambling s Full duplex operation: 200 Mbps continuous data rate s Supports both fiber optic and copper twisted- pair media s Diagnostic features — Built in Self Test (BIST) in Address Filter, Physical Layer Controller with Scrambler s Hardware Physical Connection Management support s Low power consumption—reduction of more than 25% from SUPERNET 2 solution FUNCTIONAL OVERVIEW SUPERNET 3 is a 208-pin CMOS integration of FDDI MAC, PHY, Address Filter, and clock generation and recovery functions. It is the third generation FDDI offering from AMD which integrates the SUPERNET 2 family of chips into a single-chip solution. Refer to the SUPERNET 2 data book (PID 15502C) for basic feature descriptions. The SUPERNET 3 is backward compatible to the SUPERNET 2 Tag Mode of operation in which the SUPERNET 3 buffer memory interface logic maintains the buffer memory as multiple FIFOs. The SUPERNET 3 provides DMA channels, arbitrates access to the network buffer memory, and controls t……
