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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 FIFO supports zero wait-state operations, substantially improving performance over other IDE implementations. The Enhanced ATA Specification can be supported either by setting Strap Options or by programming internal registers.
2.
82C621A Datasheet
