82C621A Datasheet - OPTi

82C621A PCI IDE Controller

Figure 3-1 Pin Diagram .~ a:: rn !c- -z

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

82C621A-OPTi.pdf