Memory & Logic

Host Bridges (EHB) by Renesas play a critical system role acting as a hub between the host processor, the system memory, and the system input/output (I/O). The host processor and the system I/O both use the host bridge to access common system memory. In addition, the system controller and host processor use the host bridge to configure and manage system I/O.

Renesas offers host bridges that service high-end discrete processors as well as bridges that are optimized for embedded integrated controllers.

Technical inquiries or support questions can be submitted via the technical support form.

PowerSpan II™

The PowerSpan II is a multi-port PCI bus switch that bridges PCI to the PowerQUICC™ II (MPC8260), MPC7xx, PowerPC® 7xx, and PMC-Sierra WinPath™ processors. The bridge defines a new level of PCI bus switch flexibility.

The PowerSpan II 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, a PowerPC memory controller, provides a 100MHz PowerPC interconnect solution. This flexible offering allows designers to leverage the PowerSpan II and PowerPro devices across many different system architectures with a common investment in software.

QSpan II™

The QSpan II is an industry-proven, Freescale™ Semiconductor processor-to-PCI system interconnect device. The QSpan II enables board designers to bring PCI-based embedded products to market faster, for less cost, and with high performance.

The QSpan II is designed to gluelessly bridge the Freescale PowerQUICC™ and QUICC™ (MC68360) processors to the PCI bus. The QSpan II is backward compatible with the QSpan 1.2.

Product Selection Table

    Processing table
    PCI Bus
    Processor Bus
    Memory Interface
    Temp. Range
    Power Consumption Max (W)
    Pkg. Code
    Pkg. Dimensions (mm)
    105°C Max. Case Temp.
    Part Number
    CA91L8260B
    PowerPC to PCI Bus Switch    		 66MHz/64 bit PCI PowerQUICC II (MPC82xx)-100MHz 0 to 70°C 1.9 AE420, AEG420 35.0 x 35.0 x 2.33
    CA91L862A
    PowerQUICC to PCI Bridge    		 33MHz/32-bit PCI PowerQUICC (MPC8xx) -50MHz -40 to 85°C 0.9 BG256, BGG256 27.0 x 27.0 x 2.0
    TSI108
    Host Bridge    		 133MHz/64-bit PCI-X PowerPC 7xx/7448 -200MHz DDR2-400 0 to 70°C 3.7 RM1023 33.0 x 33.0 x 2.0
    TSI109
    Host Bridge    		 133MHz/64-bit PCI-X PowerPC 7xx/7448 -200MHz DDR2-400 -40 to 85°C, 0 to 70°C 3.7 HM1023, RM1023 33.0 x 33.0 x 2.0
    TSI110
    Host Bridge    		 133MHz/64-bit PCI-X PowerPC 7xx/7448 -167MHz DDR2-333 MHz 0 to 70°C 2.27 RM1023 33.0 x 33.0 x 2.0
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    Documentation

    Title
    		Type Date
    Military and Aerospace Product Overview
    PDF 603 KB     		Overview
    Switching and Bridging Solutions
    PDF 1.24 MB     		Overview
    2 items