82C621A Datasheet (OPTi) - PCI IDE Controller

82C621A, PCI IDE Controller

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82C621A PCI IDE Controller 1.0 Overview The OPTi 82C621A PCI IDE Controller (PIC) is a 100-pin controller chip designed for a fast and flexible interface between the PCI bus and two IDE cables.

The 82C621A implements a PCI function to directly support both the Primary and Secondary IDE in a single 100-pin PQFP.

This high-integration approach reduces component count, eases board design, reduces cost and increases reliability.

An integrated 4-level read-prefetch FIFO and a 4-level posted write F

82C621A Features

* Supports 32-bit PCI Bus & Configuration Registers 100-pin PQFP Supports 4 ATA peripherals Optional PCI Expansion ROM support 16-byte Read-Prefetch and Write-Posting FIFO IDE timing controlled by either Straps or Registers 2.1 Special Feature Notes Write Posting and Read-prefetch allows CPU memory c