Synchronous serial data adaptor
Patent 4071887 Issued on January 31, 1978. Estimated Expiration Date: 
January 31, 1995. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
January 31, 1995. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3310626 3400375 3419849 3419852 3748649 3757306 3771134 3825905 Input/output connection arrangement for microprogrammable computer Asynchronous communication interface adaptor Patent #: 3975712 AbstractAn integrated circuit synchronous data adaptor (SSDA) provides a bidirectional interface for synchronous data interchange. Internal control and interface logic including first-in-first-out (FIFO) buffer memory enables simultaneous transmitting and receiving of standard synchronous communication characters to allow data transfer between serial data channels and the parallel bidirectional data bus of a bus organized system such as a microprocessor (MPU) system. Parallel data from the bus system is serially transmitted and received by the SSDA with synchronization character insertion and deletion, fill character insertion and deletion, parity generation and error checking. The functional configuration of the SSDA is programmed via the MPU system data bus during system initialization and can be reconfigured via program control during subsequent system operation. Programmable control registers provide control for variable word lengths, transmit control, receive control, synchronization control, and interrupt control. Status, timing and control lines provide peripheral unit or modem control. | |
