Mercury Systems is bringing flexibility to external I/O with its Ensemble IOM-141 streaming I/O Switched Mezzanine Card (XMC), providing 2,5 Gbaud of full-duplex bandwidth per channel and four channels per card.
With fibre connection distances of up to 150 metres and with a latency as low as 4 s, it is ideally suited as the real-time digital interface for sensor input or data output in a high-performance embedded system.
Each channel is programmable for data distribution without processor intervention. Although the data destination is typically a PCIe targeted memory, with Mercury’s system-focused approach and drivers, destinations may be anywhere where fabric based connectivity exists, even when mode changes are called for.
The IOM-141 can inspect the input data stream that indicates sensor mode changes and route data appropriately for each different mode. Each mode can be made to correspond with an application-defined Direct Memory Access (DMA) Command Packet (CP) chain. These command packets cause the channel’s DMA controller to route the data to a predefined destination anywhere within the system’s switch fabric.
Mercury provides a data transfer facility layered on top of the standard Mercury Interprocessor Communication System (ICS). This facility consists of a set of user-callable I/O control functions. These functions are used to define I/O transfer requests (DMA command packets) and to link such requests into a chain that is then automatically executed by the designated I/O device.
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