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DP83932CVF-25
DP83932C-20 25 33 MHz SONIC TM Systems-Oriented Network Interface Controller General Description The SONIC (Systems-Oriented Network Interface Controller) 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 3% of the bus bandwidth (25 MHz bus clock) 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 offers maximum flexibility in a variety of environments from PC-oriented adapters to high-speed motherboard designs Furthermore the SONIC integrates a fully-compatible IEEE 802 3 Encoder Decoder (ENDEC) allowing for a simple 2-chip solution for Ethernet when the SONIC is paired with the DP8392 Coaxial Transceiver Interface or a 10BASE-T transceiver For increased performance the SONIC 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 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 by adding descriptors to the memory resource area The transmit buffer management uses two areas in memory one for indicating status and control information and the other for 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 32-bit non-multiplexed address and data bus 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 Complete address filtering for up to 16 physical and or multicast addresses 32-bit general-purpose timer Full-duplex loopback diagnostics Fabricated in low-power CMOS 132 PQFP package Full network management facilities support the 802 3 layer management standard Integrated support for bridge and repeater applications System Diagram TL F 10492 – 2 TRI-STATE is a registered trademark of National Semiconductor Corporation SONICTM is a trademark of National Semiconductor Corporation C1995 National Semiconductor Corporation TL F 10492 RRD-B30M105 Printed in U S A DP83932C-20 25 33 MHz SONIC Systems-Oriented Network Interface Controller 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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