2.3.12. Block time and time between barriers

Two registers define an upper limit on the time waited for a character to be transmitted by the card:

SCIBLKTIME

defines the timeout limit for the first character in a block

SCICHTIME

defines the maximum allowed time between characters (excluding the first character in a block).

The SCICHTIME counter is linked to the SCIBLKTIME counter and not start until the SCIMBLKTIME counter has stopped (That is, the first character in the block has arrived, or if the block timer has been disabled). The transmit/receive interlock mechanism prevents the SCICHTIME and SCIBLKTIME counters from running while characters are still present in the transmit FIFO.

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