PCI-ISA-001 is targeted to mimic the success of low-cost ISA adapter card market to the PCI bus architecture. This can be achieved by converting existing ISA adapter card designs to PCI using the PCI-ISA-001. Moreover, the simplicity of the ISA bus architecture presents a very attractive option for designing new adapter products that require throughput similar to the ISA bus.

The low-cost PCI-ISA-001 offers following benefits:

	It protects investment in ISA adapter card products while enabling PCI adapter card market with very low additional investment.
	It allows fast low-risk engineering effort for ISA to PCI adapter migration that enables faster PCI market entry.
	It allows multiple ISA card functions to be integrated in the same PCI adapter card to open up further market opportunities. The multi-function PCI-ISA-001 can support a maximum of three functions.
	It enables new designs that require low-medium data throughput to use PCI bus architecture without the overhead of a PCI learning curve.

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PCI interface

	3.3v PCI compliant I/O.
	5v tolerant PCI I/O.
	32–bit 33 MHz PCI 2.1 Local Bus.
	Configuration register support for maximum of 3 add-on functions.
	PCI master/target capable.

ISA like Add-on interface

	8–bit data, 11–bit address.
	Interface supports full DMA capability consistent with ISA DMA architecture.
	Independent address mappings of each Add-on function within the 11–bit address space.

Built in DMA engine

	Engine can access both I/O and memory space on the PCI side.
	Engine can access both the address mapped and the DMA spaces in the add-on device through ISA like interface.

4-pin Serial Non-volatile RAM interface

	Auto download of Serial EEPROM content at reset time for personalization.
	Field upgrade support; In-Circuit Serial EEPROM update can be performed from the PCI side.