Freescale Semiconductor, Inc.
BEGIN
YES
RDRF = 1
?
NO
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
OR = 1
?
RIE = 1
?
RE = 1
?
NO
NO
NO
TDRE = 1
?
TIE = 1
?
TE = 1
?
NO
NO
NO
TC = 1
?
TCIE = 1
?
NO
NO
YES
IDLE = 1
?
ILIE = 1
?
RE = 1
?
NO
NO
NO
NO – VALID SCI
REQUEST
YES – VALID SCI
REQUEST
Figure 7-4 Interrupt Source Resolution Within SCI
SERIAL COMMUNICATIONS INTERFACE
MC68HC11F1
7-12
TECHNICAL DATA
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