Datasheet

Serial Communications Interface (SCI)
Technical Data MC68HC908GR8 — Rev 4.0
242 Serial Communications Interface (SCI) MOTOROLA
Figure 18-5. SCI Receiver Block Diagram
ALL 1s
ALL 0s
M
WAKE
ILTY
PEN
PTY
BKF
RPF
H876543210L
11-BIT
RECEIVE SHIFT REGISTER
STOP START
DATA
RECOVERY
DMARE
SCRF
OR
ORIE
NF
NEIE
FE
FEIE
PE
PEIE
DMARE
SCRIE
SCRF
ILIE
IDLE
WAKEUP
LOGIC
PARITY
CHECKING
MSB
ERROR CPU INTERRUPT REQUEST DMA SERVICE REQUEST
CPU INTERRUPT REQUEST
SCI DATA REGISTER
R8
DMARE
ORIE
NEIE
FEIE
PEIE
SCRIE
ILIE
RWU
SCRF
IDLE
OR
NF
FE
PE
PE1/RxD
INTERNAL BUS
PRE-
SCALER
BAUD
DIVIDER
÷ 4 ÷ 16
SCP1
SCP0
SCR2
SCR1
SCR0
SCRIE
DMARE
CGMXCLK
IT12
A
B
SL
X
SCIBDSRC
FROM
SL = 0 => X = A
SL = 1 => X = B
CONFIG2
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cale Semiconductor,
I
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