Abstract A control system interface which transfers items of information over a data line between a remote terminal and a multiplexer unit including a first register in the terminal for accumulating an item of information to be transferred to the multiplexer unit and a clock for generating a series of pulses including a synchronizing pulse and a number of transfer pulses; a first driver delivers items from the first register in the terminal to the data line and a second register in the terminal accumulates an item of information received from the multiplex unit over the data line; a first gate enables the first driver and the first register to deliver the item of information from the first register to the data line in response to a first group of the transfer pulses and enables the second register to receive an item of information from the multiplexer unit over the data line in response to a second group of transfer pulses; a second driver in the multiplexer unit delivers an item of information on the data line to the terminal and a scanner in the multiplexer unit receives an item of information from each terminal in sequence; a second gate responsive to the first group of transfer pulses enables the scanner to receive an item of information from the terminal and in response to the second group of transfer pulses enables the second driver to deliver an item of information to the terminal.
A control system for transferring items of information over data lines between remote terminals and a receiving device comprising: a first register in each said terminal for accumulating an item of information to be transferred to said receiving device; clock means including a clock pulse generator for producing transfer pulses occurring at a first rate, a synchronizing generator for producing synchronizing pulses at a lower rate, and mixer means, responsive to both generators for producing a recurring series of timing pulses including a synchronizing pulse and a number of transfer pulses; first driver means, responsive to said first register, for delivering said items to a said data line for transfer to said receiving device; a second register in each said terminal for accumulating an item of information received from said receiving device on a said data line; first gating means for enabling said first driver means to deliver an item of information from said first register to said receiving device over a said data line in response to a first group of said transfer pulses and for enabling said second register to receive an item of information from said receiving device over a said data line in response to a secOnd group of said transfer pulses; second driver means in said receiving device for delivering an item of information on a said data line to a said terminal; scanner means in said receiving device for receiving an item of information from each data line of each terminal in sequence; and second gating means, responsive to said first group of transfer pulses, for enabling said scanner means to receive items of information from a said terminal over a said data line and responsive to said second group of transfer pulses, for enabling said second driver means to deliver an item of information to a said terminal over a said data line.
Claim 2
Dependent Claim
310 words
A control system for transferring items of information over data lines between remote terminals and a receiving device comprising: a first register in each said terminal for accumulating an item of information to be transferred to said receiving device; clock means including a clock pulse generator for producing transfer pulses occurring at a first rate, a synchronizing generator for producing synchronizing pulses at a lower rate, and mixer means, responsive to both generators for producing a recurring series of timing pulses including a synchronizing pulse and a number of transfer pulses; first driver means, responsive to said first register, for delivering said items to a said data line for transfer to said receiving device; a second register in each said terminal for accumulating an item of information received from said receiving device on a said data line; first gating means for enabling said first driver means to deliver an item of information from said first register to said receiving device over a said data line in response to a first group of said transfer pulses and for enabling said second register to receive an item of information from said receiving device over a said data line in response to a secOnd group of said transfer pulses; second driver means in said receiving device for delivering an item of information on a said data line to a said terminal; scanner means in said receiving device for receiving an item of information from each data line of each terminal in sequence; and second gating means, responsive to said first group of transfer pulses, for enabling said scanner means to receive items of information from a said terminal over a said data line and responsive to said second group of transfer pulses, for enabling said second driver means to deliver an item of information to a said terminal over a said data line.
Claim 3
Dependent Claim
55 words
The control system of claim 1 in which said first gating means includes first means for counting the number of transfer pulses following a synchronizing pulse, and first means, responsive to said first means for counting, for distinguishing between the period of said first group of transfer pulses and said second group of transfer pulses.
Claim 4
Dependent Claim
55 words
The control system of claim 1 in which said second gating means includes second means for counting the number of transfer pulses following a synchronizing pulse, and second means responsive to said second means for counting, for distinguishing between the period of said first group of transfer pulses and said second group of transfer pulses.