Digital interface between at least two subscriber line interface circuits and a processing unit
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United States of America Patent
Stats
-
Jan 9, 1990
Grant Date -
N/A
app pub date -
Jan 25, 1988
filing date -
Feb 12, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A digital interface between at least two subscriber line interface circuits and a processing unit is described. The interface is configured in the form of a parallel interface. The level of an input/output register and of a control register is allocated, as needed, to the connections of the processing unit. These connections can be operated selectively as inputs or outputs. They can also be operated in two modes, depending upon which type of subscriber line interface circuit (SLIC) is connected. The connections of the last-mentioned units are partially operable as inputs or outputs and partially operable only as inputs but in the input case, selectively for various types of input signals.
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