Parallel ATA IP Host Controller with SpeedSelect

The Mentor Graphics?parallel ATA host controller provides an efficient and easy-to-use interface to IDE and ATAPI devices. The core implements programmable I/O, multi-word direct memory access (DMA), and Ultra ATA -33, -66, -100, and -133 modes of operation and supports up to two devices. The core interface to the system-on-chip provides PIO access and DMA capability to optimize data transfers to and from the IDE devices. For ease of integration, the parallel ATA device includes a register set compatible with the Intel chip set, including a descriptor-based scatter-gather DMA
core. This core is compatible with ATA-4, and with Ultra ATA-33, -66, -100, and -133 extensions. However, singleword DMA is not supported.

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