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Disclosed is function that allows a bidirectional serial link to transmit data with or without checking the incoming link status.
English (United States)
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Serial Link Checking Function
Disclosed is function that allows a bidirectional serial link to transmit data with
or without checking the incoming link status.
When a serial link is attached to a processor that operates much slower than
the link, the hardware must check to see if transmission is acceptable based on
the incoming link status. This check normally operates based on the type of
information block ("frame") being sent. Frames that do not cause a connection
are sent without checking for a good incoming link.
When the serial link is transmitting other types of information, this check is no
longer valid since there is no frame. A programmable bit is provided to tell the
hardware to check the link or not before transmission. This bit also provides the
ability to change the normal frame transmission check for diagnostic, etc.,