Datasheet
520
Figures 14.14 and 14.15 show examples of SCI receive operation using a multiprocessor format.
RDRF
MPIE
RDR
value
ID1
RxI interrupt request
(multiprocessor
interru
p
t
)
, MPIE = 0
RxI interrupt handler
reads data in RDR
and clears RDRF to 0
Not station’s
ID, so MPIE is
set to 1 a
g
ain
No RxI interrupt,
RDR maintains
state
01
1 1
10 1
Serial
data
Start
bit
Stop
bit
Start
bit
Stop
bit
Idling
(marking)
D0 D1 D7 D0 D1 D7 0
MPB
MPB
MPB
Data
(ID1)
Data
(data 1)
Figure 14.14 SCI Receive Operation (ID Does Not Match)