Datasheet

Serial Communications Interface (SCI)
Technical Data MC68HC908GR8 — Rev 4.0
234 Serial Communications Interface (SCI) MOTOROLA
Figure 18-1. SCI Module Block Diagram
SCTE
TC
SCRF
IDLE
OR
NF
FE
PE
SCTIE
TCIE
SCRIE
ILIE
TE
RE
RWU
SBK
R8
T8
DMATE
ORIE
FEIE
PEIE
BKF
RPF
SCI DATA
RECEIVE
SHIFT REGISTER
SCI DATA
REGISTER
TRANSMIT
SHIFT REGISTER
NEIE
M
WAKE
ILTY
FLAG
CONTROL
TRANSMIT
CONTROL
RECEIVE
CONTROL
DATA SELECTION
CONTROL
WAKEUP
PTY
PEN
REGISTER
DMA
INTERRUPT
CONTROL
TRANSMITTER
INTERRUPT
CONTROL
RECEIVER
INTERRUPT
CONTROL
ERROR
INTERRUPT
CONTROL
CONTROL
DMARE
ENSCI
LOOPS
ENSCI
PE1/RxD PE2/TxD
INTERNAL BUS
TXINV
LOOPS
÷ 4
∏ ÷ 16
PRE-
SCALER
BAUD
DIVIDER
CGMXCLK
IT12
A
B
SL
X
SCIBDSRC
FROM
SL = 0 => X = A
SL = 1 => X = B
CONFIG
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cale Semiconductor,
I
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