Am79C974

` Compliant to ANSI standards X3.131 1986 (SCSI-1) and X3.131 199X (SCSI-2)
` Fast 8-bit SCSI-2 10 Mbyte/s synchronous or 7 Mbyte/s asynchronous data transfer rate
`SCSI specific Bus Mastering DMA engine (32-bit address/data)
` 96-byte DMA FIFO for low bus latency
`On-chip state machine to control the SCSI sequences in hardware
` Integrated industry standard Fast SCSI-2 core
` Single-Ended 48 mA outputs to drive the SCSI bus directly
` Support for Scatter-Gather DMA data transfers
`Hooks in silicon and software to enable disk drive spin down for power savings

The PCnet-SCSI combination Ethernet and 8-bit Fast SCSI controller Am79C974 with a 32-bit PCI bus interface is a highly integrated Ethernet-Fast SCSI system solution designed to address high-performance system application requirements. This single-chip is a flexible bus-mastering device that can be used in many applications, including network- and SCSI-ready PCs, printers, fax modems, and bridge/router designs. The bus-master architecture provides high data throughput in the system and low CPU and system bus utilization. The PCnet-SCSI controller is fabricated with AMD's advanced low-power CMOS process to provide low operating and standby current for power sensitive applications.

The PCnet-SCSI is part of AMD's PCI product family of plug-in and software compatible SCSI and Ethernet controllers. Am79C974 compatibility ensures a low cost system upgrade path and lower motherboard manufacturing costs.