Texas Instruments Corporation

Cheryl S Shepherd

Peter Galicki

Jonathan H Thorn

The datapipe routing bridge is composed of three building blocks, transmitter, bridge and receiver. The bridge component provides high levels of connectivity between multiple digital signal processors without paying the penalties usually associated with inter-processor connections. The individual digital signal processors are connected with unidirectional point-to-point links from a bridge terminal on one digital signal processor to a bridge terminal on another digital signal processor. A real-time comparison of the packet header information with direction identification codes (IDs) stored inside the bridge routes individual data transfer packets arriving at the bridge into the local processor, repeated out to the next processor or simultaneously absorbed and repeated.

Datapipe routing bridge

In a network of digital signal processor nodes connected in a peer-to-peer relationship, a data packet sent to a node causes a return transmission from that node. The requester digital signal processor sends a data packet to a target digital signal processor. Upon arrival at the target digital signal processor, its receiver drives the arriving request packet into an I/O memory and triggers a transmitter interrupt. Next, the pull interrupt causes the transmitter to execute on a next packet boundary the pull request packet. Finally, the execution of the pull request causes the transmitter to pull a portion of the local I/O memory and send it back to the requester digital signal processor. The same physical portion of the I/O memory is overlaid with two logical uses, a receiver channel and a transmitter code block.

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Houston, TX, United States of America

Cheryl S Shepherd