 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
AM79C850KC Datasheet(PDF) 1 Page - Advanced Micro Devices |
|
||||||||||||||||||||||||||||||
AM79C850KC Datasheet(HTML) 1 Page - Advanced Micro Devices |
|
|
1 / 97 page  Publication# 19574 Rev. A Amendment /0 Issue Date: April 1995 This document contains information on a product under development at Advanced Micro Devices, Inc. The information is intended to help you to evaluate this product. AMD reserves the right to change or discontinue work on this proposed product without notice. Advanced Micro Devices Am79C850 SUPERNET® 3 PRELIMINARY DISTINCTIVE CHARACTERISTICS s Compliant with the ANSI X3T9.5/ISO 9314 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 s ANSI-compliant TP-PMD Stream Cipher 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 the data path between the buffer memory and the medium. The MAC also implements the timed-token protocol and receive/transmit control as specified for the Media Access Control (MAC) sublayer of the ISO standard 9314-2 for FDDI. The Physical Layer functions defined by the ISO 9314-1 are performed by the SUPERNET 3. SUPERNET 3 implements on-chip digital clock recovery and transmit functions for fiber. To support copper media, the PHY-PMD interface is maintained and an external module can be implemented in the same footprint as the fiber optic transceiver to perform the MLT-3 encoding/decoding and equaliza- tion. SUPERNET 3 integrates the scrambler and descrambler functions for transmissions over copper media. SUPERNET 3 FEATURES UPDATE The basic feature description for SUPERNET 3 is provided in the SUPERNET 2 data book. The enhanced features are as listed below: s This is a CMOS integration of the redesigned FORMAC Plus, an enhanced PLC, a 32-entry address filter (AF, which is based on a Content Addressable Memory, or CAM, core), and a CMOS PDX core for clock and data recovery. s A 32-entry, extensible and fully maskable AF allows additional individual and group addresses to be supported. s The physical data transmitter and receiver (PDX) circuits are also embedded on-chip using proprietary digital clock-recovery technology. s For the purposes of implementing copper PMD, the scrambler/descrambler functions are embedded within the chip. s The Buffer Memory interface has been modified to support slower SRAM’s (35 ns) without affecting backward compatibility with SUPERNET 2. s SUPERNET 3 supports the FDDI single attachment station (SAS) but is capable of supporting a dual attachment station (DAS) |
Similar Part No. - AM79C850KC |
|
Similar Description - AM79C850KC |
|
|
Link URL |
| Privacy Policy |
| ALLDATASHEET.COM |
| Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Datasheet Upload | Contact us | Privacy Policy | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
| Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
|
Family Site : ic2ic.com |
icmetro.com |
English ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
