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Table 15.3 Interrupt Control Function
FIIR
INTID
INTPEND Priority Type of Interrupt
2
1
0
0
0
0
1
0
1
1
0
0
1
0
0
1
1
0
0
0
0
1
0
0
0
0
0
Section 15 Serial Communication Interface with FIFO (SCIF)
Setting/Clearing of Interrupt
No interrupt
1 (high) Receive line status Overrun error,
2
Receive data ready Receive data
2
Character timeout
(with FIFO enabled)
3
FTHR empty
4 (low)
Modem status
Interrupt Source
None
parity error, framing
error, break
interrupt
remaining,
FIFO trigger level
No data is input to
or output from the
receive FIFO for the
4-character time
period while one or
more characters
remain in the
receive FIFO.
FTHR empty
CTS, DSR, RI, DCD FMSR read
Rev. 1.00 Mar. 12, 2008 Page 513 of 1178
Clearing of
Interrupt
FLSR read
FRBR read or
receive FIFO is
below trigger
level.
FRBR read
FIIR read or
FTHR write
REJ09B0403-0100
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