Multiplex communications – Wide area network – Packet switching
Patent
1989-06-22
1991-06-11
Olms, Douglas W.
Multiplex communications
Wide area network
Packet switching
3701001, H04J 306
Patent
active
050238701
ABSTRACT:
The circuit of the present invention provides a signal which allows data to be transferred between a first synchronous system to a second synchronous system. Where the first synchronous system is a Time-Division-Multiplexing (TDM) system and the second synchronous system is a Microprocessor system. The transfer is allowed at the end of the assigned time slot provided that the microprocessor is not accessing the data. If the microprocessor is accessing the data, then the transfer is delayed for three clock cycles of the TDM clock. After the delay, if the microprocessor is still accessing the data, the transfer is delayed again. The delaying continues until the microprocessor is no longer accessing the data, at which time the transfer is allowed.
REFERENCES:
patent: 4910507 (1990-03-01), Shimizu et al.
AG Communication Systems Corporation
Baca Anthony J.
Marcelo Melvin
Olms Douglas W.
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