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THE COMMAND INTERPRETER
V-79
For an asynchronous channel
IT#
IT0
IT1 (STCNT=1)
IT1 (STCNT>1)
IT2 (Mde=0)
IT2 (Mde=1)
IT3
IT4
IT5
IT6
IT7
Event that triggers interrupt
Character received.
Comments
Except handshake characters.
The character is not added to
the buffer but is given to the
interrupt.
The character
counter is not modified.
See STCNT command.
See STCNT command.
First character received.
Sequence of STCNT characters received.
Receive buffer full.
Receive buffer has gone from empty to notempty.
End of string
See CHDEF command
Time out
See STTMO command.
Receive error detected.
Parity error, frame error or
character lost.
CTS, CD, or RI signals changed state, or
BREAK sequence detected.
Transmit
buffer
completely
empty
(including stop bit).
For an HDLC or BISYNC channel
IT#
IT0
IT1
IT2 (Mde=0)
IT2 (Mde=1)
IT3
IT4
IT5
IT6
IT7
Event that triggers interrupt
Not defined.
Frame received.
14 frames received.
First frame received.
Not defined.
Time-out
Receive error detected.
Comments
See STTMO command.
Frame or CRC error (in
HDLC mode), characters in
controller's
FIFO
buffer
overwritten.
CTS or DCD signals changed state, or an
ABORT signal detected in HDLC mode.
No more frames to send
MULTIPROTOCOL SOFTWARE USER’S MANUAL (DTUS016) - REV. B.03 JAN. 5, 1998