Programmable bit-collision adjustment circuitry for a bi-directional serial communication link
AssigneeCaterpillar Inc.
InventorsPaul M. Young, Gregory L. Williamson
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Abstract
A digital communication circuit that avoids bit collisions between an external communication device and a controller that communicate to each other through a bi-directional serial communication link is disclosed. The digital communication circuit includes digital circuitry that receives and transmits a digital communication signal. A detection circuit detects when a digital communication signal is being received. And delay circuitry receives the transmitted digital communication signal and responsively produces a delay signal to delay the detection of the received digital communication signal.
Claims8
A digital communication circuit that avoids bit collisions between an external communication device and a controller, the controller being located within the digital communication circuit, that communicate to each other through a bi-directional serial communication link, comprising:
- means for transmitting a first digital communication signal, said means also producing a detainment signal that is responsive to an RC time delay associated with the communication link;
- means for receiving one of said first and a second digital communication signal, wherein said second signal is one of an echo of said first signal and an external signal produced by the external communication device;
- means for detecting when one of said first and said second digital communication signals is being received;
- and
- delay means for receiving said first digital communication signal and said detainment signal and responsively delivering a delay signal to said detection means to delay the detection of said received digital communication signal.
A digital communication circuit that avoids bit collisions between an external communication device and a controller, the controller being located within the digital communication circuit, that communicate to each other through a bi-directional serial communication link, comprising:
- means for transmitting a first digital communication signal, said means also producing a programmable detainment signal that is responsive to an RC time delay associated with the communication link;
- means for receiving one of said first and a second digital communication signal, wherein said second signal is one of an echo of said first signal and an external signal produced by the external communication device;
- means for detecting when one of said first and said second digital communication signals is being received;
- and
- delay means for receiving said first digital communication signal and said detainment signal and responsively delivering a delay signal to said detection means to delay the detection of said received digital communication signal.
Dependencies are inferred from the claim text.