National (National Semiconductor ) : DP83372-F, DP 83382-R

FRED chip set

The adaptive ATM FRED chips are designed to be used inequipment which interfaces to an ATM network. The functionsincluded are most of the ATM layer, segmentation and re assembly(SAR) and DMA/buffer management functions. The ATM interfacechip set is a two-chip set, partitioned into transmit and receivefunctions, which we refer to as "FRED"(Fragmentation-Re assembly Engine with DMA). This ATMinterface chip set is designed to provide network interface functionsat a similar level as those provided by a LAN controller:

• On transmit, packet buffers are queued to the FRED, which fragments the packets into standard cells and meters them into the network over virtual circuits at peak and average rates specified a priori by software.
• On receive, cells are accepted from the line, with multiple frames possibly interleaved together, and the cells are verified, headers are stripped, the user data is reassembled into frames, then enqueued for the receiver software when the entire frame has been received.

Technology:	unknown
Package:	unknown 0 Pin