Datenblatt-Suchmaschine für elektronische Bauteile |
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AM79C90PC Datenblatt(PDF) 1 Page - Advanced Micro Devices |
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AM79C90PC Datenblatt(HTML) 1 Page - Advanced Micro Devices |
1 / 62 page PRELIMINARY This document contains information on a product under development at Advanced Micro Devices. The information is intended to help you evaluate this product. AMD reserves the right to change or discontinue work on this proposed product without notice. Publication# 17881 Rev: C Amendment/0 Issue Date: January 1998 1 Am79C90 CMOS Local Area Network Controller for Ethernet (C-LANCE) DISTINCTIVE CHARACTERISTICS s Compatible with Ethernet and IEEE 802.3 10BASE-5 Type A, and 10BASE-2 Type B, “Cheapernet,” 10BASE-T s Easily interfaced with 80x86, 680x0, Am29000®, Z8000™ microprocessors s On-board DMA and buffer management, 64-byte Receive, 48-byte Transmit FIFOs s 24-bit-wide linear addressing (Bus Master Mode) s Network and packet error reporting s Back-to-back packet reception with as little as 0.5 µs interframe spacing s Diagnostic Routines — Internal/external loopback — CRC logic check — Time domain reflectometer s Low power consumption for power-sensitive applications s Completely software- and hardware-compatible with AMD’s LANCE device (Am7990) (see Appendix A) GENERAL DESCRIPTION The Am79C90 CMOS Local Area Network Controller for Ethernet (C-LANCE) is a 48-pin VLSI device de- signed to greatly simplify interfacing a microcomputer or minicomputer to an IEEE 802.3/Ethernet Local Area Network. The C-LANCE, in conjunction with the Am7992B Serial Interface Adapter (SIA), Am7996 or Am79C98 and Am79C100 Transceiver, and closely coupled local memory and microprocessor, is intended to provide the user with a complete interface module for an Ethernet network. The Am79C90 is designed using a scalable CMOS technology and is compatible with a variety of microprocessors. On-board DMA, advanced buffer management, and extensive error reporting and diagnostics facilitate design and improve system performance. BLOCK DIAGRAM INTR HOLD HLDA ALE/AS CS ADR DAS DALO DALI READ BM0/BYTE BM1/BUSAKO READY RESET Parallel Bus Interface DMA/Data Path Control Microprogram Store C-LANCE/ CPU Control Bus Interface Station Address Detection Retry Logic Serial I/O Interface A23:16 RX RCLK TX TCLK CLSN TENA RENA DAL15:0 17881C-1 |
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