PC87415 Datasheet | National Semiconductor

Description The Enhanced PCI-IDE Interface is a single-chip controller packaged in a 100-pin PQFP It provides 2 IDE channels for interfacing up to 4 IDE drives or 2 IDE drives and CD-ROM directly on the PCI Local bus An enhanced DMA controller on-chip increases system performance by providing full scatter gather data transfers between IDE devices and system memory without CPU intervention Four levels of both write posting and read prefetching per channel allow the host CPU to run concurrently with IDE cycles Programmable timing functions provide maximum flexibility of timing parameters per drive for optimizing the data transfer rate per drive Both PC patible addressing and PCI pliant addressing are supported by re-mapping the base addresses A power control feature allows turning off power to the IDE cables The Enhanced PCI-IDE Interface connection to the PCI bus is virtually ‘‘glue-less’’ with only one additional TTL data buffer (optional) This high-integration solution reduces ponent count eases board design reduces cost and increases reliability The Enhanced PCI-IDE supports faster ATA devices using PIO modes 1 2 3 and 4 as well as DMA modes 0 1 and 2 It es with a full suite of software drivers for DOS 5 0 - 6 x Windows 3 x Windows 95 Windows NTTM OS 2 2 x Novell Net Ware TM 3 1x- 4 x and SCO UNIX 3 x TRI-STATE is a registered trademark of National Semiconductor Corporation WATCHDOGTM is a trademark of National Semiconductor Corporation Novell is a registered trademark of Novell Inc Net Ware TM is a trademark of Novell Inc Unix is a registered trademark of AT T Bell Laboratories Windows and Windows 95 are registered trademarks of Microsoft Corporation Windows NTTM is a trademark of Microsoft Corporation 2 0 Features Y Y Y Y Y Y Y Y Y Y Y PCI bus interface for up to 4 IDE devices 33 MHz 32-bit PCI bus data path with full parity error reporting 16 7 MByte sec maximum IDE transfer rate Support for 2 IDE channels ( 2 IDE devices per channel)...