AM79C974 Datasheet | Advanced Micro Devices

Features s Direct glueless interface to 33 MHz, 32-bit PCI local bus s 132 Mbyte/s burst DMA transfer rate s pliant to PCI local bus Specification Revision 2.0 Advanced Micro Devices SCSI Features s pliant to ANSI standards X3.131 - 1986 (SCSI-1) and X3.131 - 199X (SCSI-2) s Fast 8-bit SCSI-2 10 Mbyte/s synchronous or 7 Mbyte/s asynchronous data transfer rate s SCSI specific Bus Mastering DMA engine (32-bit address/data) s 96-byte DMA FIFO for low bus latency s On-chip state machine to control the SCSI sequences in hardware s Integrated industry standard Fast SCSI-2 core s Single-Ended 48 m A outputs to drive the SCSI bus directly s Support for Scatter-Gather DMA data transfers s Hooks in silicon and software to enable disk drive spin down for power savings Ethernet Features s Supports ISO 8802-3 (IEEE/ANSI 802.3) and Ethernet Standards s High-performance Bus Master architecture with integrated DMA Buffer Management Unit for low CPU and bus utilization s Individual 136-byte transmit and 128-byte receive FIFOs provide frame buffering for increased system latency s Microwire TM EEPROM interface supports jumperless design s Integrated Manchester Encoder/Decoder s Provides integrated Attachment Unit Interface (AUI) and 10BASE-T transceiver with automatic port selection s Automatic Twisted-Pair receive polarity detection and automatic correction of the receive polarity s Dynamic transmit FCS generation programmable on a frame-by-frame basis s Internal/external loopback capabilities s Supports the following types of network interfaces: - AUI to external 10BASE2, 10BASE5, 10BASE-T or 10BASE-F MAU - Internal 10BASE-T transceiver with Smart Squelch to Twisted-Pair medium General Features s Software patible with AMD’s Am79C960 PCnet-ISA, Am79C961 PCnet-ISA+, Am79C965 PCnet-32, Am79C970 PCnet-PCI register and descriptor architecture s Plug-in and software patible with AMD’s PCSCSI family of SCSI controllers for PCI s NAND Tree test mode for connectivity testing on printed...