The CY7C09449PVA is one of the PCI interface controllers in the Cypress Semiconductor PCI-DPTM family. The CY7C09449PVA provides a PCI master and target interface with direct connections to many popular microprocessors. It provides 128 Kb of dual-port SRAM that is used as shared memory between the local microprocessor and the PCI bus. An I2O message unit, complete with message queues and interrupt capability, is also provided. The CY7C09449PVA allows the designer to interface an application to the PCI bus in a straightforward and inexpensive way.