Power-On Protocol For A Serial Interface Between A Processor And A Controlled Tool
Original Publication Date: 1980-Jun-01
Included in the Prior Art Database: 2005-Feb-13
The present system provides a protocol which is used to synchronize the communication between a controlled tool and the controlling processor over a bidirectional serial interface. When the tool is ready to be processed, it is powered on; at this point, it will transmit over the serial interface a single byte at a regular frequency. When the processor which may be involved in other functions at any given time returns to communication with the controlled tool, it will receive the next periodic "ready" byte from the controlled tool. In response, the processor will send a sequence comprising a wrapped data command followed by a train containing a preset number of data bytes.