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DP83934CVUL-25
DP83934CVUL-20 25 MHz SONIC TM -T Systems-Oriented Network Interface Controller with Twisted Pair Interface General Description The SONIC-T (Systems-Oriented Network Interface Controller with Twisted Pair) is a second-generation Ethernet Controller designed to meet the demands of today’s high-speed 32- and 16-bit systems Its system interface operates with a high speed DMA that typically consumes less than 5% of the bus bandwidth Selectable bus modes provide both big and little endian byte ordering and a clean interface to standard microprocessors The linked-list buffer management system of SONIC-T offers maximum flexibility in a variety of environments from PC-oriented adapters to high-speed motherboard designs Furthermore the SONIC-T integrates a fully-compatible IEEE 802 3 Encoder Decoder (ENDEC) and a Twisted Pair Interface which provide a one-chip solution for Ethernet when using 10BASE-T When using 10BASE2 or 10BASE5 the SONIC-T may be paired with the DP8392 Coaxial Transceiver Interface to achieve a simple 2-chip solution For increased performance the SONIC-T implements a unique buffer management scheme to efficiently process receive and transmit packets in system memory No intermediate packet copy is necessary The receive buffer management uses three areas in memory for (1) allocating additional resources (2) indicating status information and (3) buffering packet data During reception the SONIC-T stores packets in the buffer area then indicates receive status and control information in the descriptor area The system allocates more memory resources to the SONIC-T by adding descriptors to the memory resource area The transmit buffer management uses two areas in memory 1 indicating status and control information 2 fetching packet data The system can create a transmit queue allowing multiple packets to be transmitted from a single transmit command The packet data can reside on any arbitrary byte boundary and can exist in several non-contiguous locations Features Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y 32-bit non-multiplexed address and data bus Auto AUI TPI selection High-speed interruptible DMA Linked-list buffer management maximizes flexibility Two independent 32-byte transmit and receive FIFOs Bus compatibility for all standard microprocessors Supports big and little endian formats Integrated IEEE 802 3 ENDEC Integrated Twisted Pair Interface Complete address filtering for up to 16 physical and or multicast addresses 32-bit general-purpose timer Loopback diagnostics Fabricated in low-power CMOS 160 PQFP package Full network management facilities support the 802 3 layer management standard Integrated support for bridge and repeater applications System Diagram IEEE 802 3 Ethernet Thin-Ethernet 10BaseT Station TL F 11719 – 1 TRI-STATE is a registered trademark of National Semiconductor Corporation SONICTM is a trademark of National Semiconductor Corporation C1995 National Semiconductor Corporation TL F 11719 RRD-B30M105 Printed in U S A DP83934CVUL-20 25 MHz SONIC-T Systems-Oriented Network Interface Controller with Twisted Pair Interface July 1995
NS
National Semiconductor Corporation 日本ではナショセミと略称されていたが2011年9月23日、米TI社に買収され、同社のシリコンバレー部門となった。
TI
Texas Instruments Incorporated
U.S.A
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