The Tundra PowerSpan™ II is a multi-port PCI bus switch that bridges PCI to the PowerQUICC™ II (MPC8260), MPC7xx, PowerPC® 7xx, and the Wintegra WinPath™ processors. PowerSpan II is available in either a single PCI or dual PCI variant. The device defines a new level of PCI bus switch flexibility. The device has a switched PCI architecture, which maximizes transfer concurrency and improves the efficiency and burst performance on the PCI and processor buses. Along with a revolutionary switched PCI architecture, the PowerSpan II features integrated PCI-to-PCI bridging, concurrent prefetch read capability, multi-port Direct Memory Access (DMA) operation and CompactPCI Hot Swap support. The PowerSpan II is available in single or dual PCI variants. The single PCI PowerSpan II is a two-port device that has a PCI interface and a PowerPC bus interface. The dual PCI variant is a three-port device that has two PCI interfaces and a PowerPC bus interface. The PowerSpan II in conjunction with the PowerPro – PowerPC memory controller – provides a 100-MHz PowerPC interconnect solution. This flexible offering allows designers to leverage the PowerSpan and PowerPro devices across many different system architectures with a common investment in software. Business BenefitsProven ProductThe PowerSpan II is based on the proven PowerSpan device. Ease of UseA comprehensive suite of Design Support Tools are available today, including an MPC8260/PowerSpan II evaluation board from our partner Wind River™ PackagingThe PowerSpan II packages are more than 50% smaller than the original PowerSpan device. PerformanceThe key attributes of the PowerSpan II that enable higher data throughput, decreased latency, and an overall increase in system performance are: - Switched PCI architecture
- Integrated, non-transparent PCI-to-PCI bridge
- Support for multiple I/O reads in parallel, non-blocking streams
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