参数资料
型号: M-ORSO82G51BM680-DB
厂商: LATTICE SEMICONDUCTOR CORP
元件分类: FPGA
英文描述: FPGA, 1296 CLBS, 333000 GATES, PBGA680
封装: PLASTIC, FBGA-680
文件页数: 35/123页
文件大小: 2207K
代理商: M-ORSO82G51BM680-DB
Lattice Semiconductor
ORCA ORSO82G5 Data Sheet
19
In either the SONET or Cell mode, data from the DEMUX is then passed through a framer which aligns and frames
the data. Data are then processed based on Cell mode or SONET mode selection.
In the SONET mode, the descrambled data are sent to an alignment FIFO that performs lane-to-lane deskew and
optionally aligns data within a two, four or eight channel alignment group. In addition, supervisory features such as
BIP error check, OOF check, RDI monitoring and AIS-L insertion during OOF are also implemented. All the super-
visory features are controlled through programmable register bits.
In the cell mode, the framed data are then descrambled and passed into a cell extractor which extracts cells from
the payload portion of the SONET frame. The cells are passed through a FIFO that performs lane-to-lane deskew
and a clock domain transfer from 77.76 MHz to 156 MHz. A key feature in cell mode is the ability to use idle cell
insertion and deletion for automatic rate matching between the clock domains. The cells are then passed to the
IPC8 or IPC2 block which perform cell destriping before sending the cells to the FPGA logic across the Core/FPGA
interface.
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