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PEX8311-AA66BCF Datasheet(PDF) 3 Page - PLX Technology |
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PEX8311-AA66BCF Datasheet(HTML) 3 Page - PLX Technology |
3 / 4 page System Controller Card The PEX 8311 bridge, with its Root Complex mode support, simplified generic local bus interface, PCIe protocol packet conversion, and multiple DMA controllers allows users to use the device as a “north bridge” type application in embedded systems. Such controllers often manage “control path” data. The local bus has the capability to support numerous simultaneous local bus devices. Figure 2 shows the bridge interfacing a local processor, FPGA, and memory to a downstream PCIe port. The PCIe port connects to a switching fabric or I/O card. Figure 2. “Northbridge” Host Bridge Line Card Application The number and variety of PCI Express native-mode devices is growing quickly. As these devices become mainstream, it will be necessary to create multifunction and multi-port adapter cards with PCI Express capability. The PEX 8311 can be used to create a communications line card that bridges a local processing device and memory to an upstream PCIe port. The bridge allows a line card to be a backplane or a motherboard. Figure 3 shows the PEX 8311 in this application. In this mode, the bridge acts in an “EndPoint mode”. Configuration to the bridge comes from the PCIe. Use of DMA for data path and higher priority simultaneous Direct Master/Slave for control path data is invaluable. Figure 3. Communications Line Card Industrial Control Systems The PEX 8311 is an excellent choice to bridge programmable logic, local processors, and other devices PCI Express FPGA DSP Proprietary ASIC Generic Local Bus EEPROM Local Based CPU SRAM/ PEX 8311 PCI Express FPGA DSP Proprietary ASIC Generic Local Bus EEPROM Local Based CPU SRAM/ PEX 8311 x1 PCIe Local Bus: 66 MHz, 32-bit EEPROM COM 1 Flash SRAM NPU ASIC COM 2 COM N PEX 8311 x1 PCIe Local Bus: 66 MHz, 32-bit EEPROM COM 1 Flash SRAM NPU ASIC COM 2 COM N PEX 8311 to a PCIe switch. The bridge is fully interoperable with PCIe switches from a variety of PCIe products including multiple switches from PLX Technology with lane counts from 8 to 32. Figure 4 illustrates PEX 8311 bridging programmable logic devices to the PEX 8524 switch. One of the many applications for the bridge is to interface inputs via an FPGA from industrial signals from the manufacturing floor to a PCIe switch where the data is sent to a local processor and then to a central host for system control applications. This use can be generalized to many similar bridging operations such as in instrumentation or medical imaging. Figure 4. Industrial Control In this type application, the bridge’s x1 lane PCIe 2.5 Gbps bandwidth in combination with its large local bus capacitive loading can support up to five simultaneous input sources on each PEX 8311. With a Local Bus of up to 66 MHz and 32-bit data, complete bandwidth matching with the PCIe port can be achieved in unidirectional designs. Video Surveillance System The PEX 8311 is a very economical bridge and can support many “mass market” applications. These applications include PC television capture cards, data acquisition boards, video editing, and surveillance systems. The later is shown in Figure 5 below. This design allows multiple camera sources to feed their inputs through a series of compression, buffering stages and local processing and be bridged to a PCIe switch or directly to a PCIe slot on a motherboard. The PC then allows security personnel to monitor multiple feeds and switch interactively among the various feeds. Video editing by consumers could use a similar design topology as well. Figure 5. Video Surveillance System CPU SDRAM FPGA FPGA FPGA FPGA 250MB/s 250MB/s 250MB/s 250MB/s PEX 8524 To Host PEX 8311 PEX 8311 PEX 8311 PEX 8311 PEX 8524 CPU SDRAM FPGA FPGA FPGA FPGA PEX 8524 PEX 8311 PEX 8311 PEX 8311 PEX 8311 PEX 8311 PEX 8311 PEX 8311 PEX 8311 PEX 8524 CPU SDRAM FPGA FPGA FPGA FPGA PEX 8524 PEX 8311 PEX 8311 PEX 8311 PEX 8311 PEX 8311 PEX 8311 PEX 8311 PEX 8311 PEX 8524 CPU SDRAM FPGA FPGA FPGA FPGA PEX 8524 PEX 8311 PEX 8311 PEX 8311 PEX 8311 PEX 8311 PEX 8311 PEX 8311 PEX 8311 PEX 8524 JPEG FIFO FPGA Camera Camera Camera JPEG FIFO FPGA Camera Camera Camera M o t h e r b o a r d CPU CPU PEX 8311 PEX 8311 PEX 8524 JPEG FIFO FPGA JPEG FIFO FPGA CPU CPU CPU CPU PEX 8311 PEX 8311 PEX 8311 PEX 8311 PEX 8524 JPEG FIFO FPGA Camera Camera Camera JPEG FIFO FPGA Camera Camera Camera CPU CPU CPU CPU PEX 8311 PEX 8311 PEX 8311 PEX 8311 PEX 8524 JPEG FIFO FPGA JPEG FIFO FPGA CPU CPU CPU CPU PEX 8311 PEX 8311 PEX 8311 PEX 8311 PEX 8524 |
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