Datasheet

Serial Communications Interface Module (SCI)
MC68HC908KX8 • MC68HC908KX2 • MC68HC08KX8 Data Sheet, Rev. 2.1
118 Freescale Semiconductor
12.4.3 Receiver
Figure 12-6 shows the structure of the SCI receiver.
Figure 12-6. 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
OR
ORIE
NF
NEIE
FE
FEIE
PE
PEIE
SCRIE
SCRF
ILIE
IDLE
WAKEUP
LOGIC
PARITY
CHECKING
MSB
ERROR CPU INTERRUPT REQUEST CPU INTERRUPT REQUEST
SCI DATA REGISTER
R8
ORIE
NEIE
FEIE
PEIE
SCRIE
ILIE
RWU
SCRF
IDLE
OR
NF
FE
PE
INTERNAL BUS
PRE-
SCALER
BAUD
DIVIDER
÷ 4 ÷ 16
SCP1
SCP0
SCR2
SCR1
SCR0
BAUDCLK
RxD