Datasheet

Serial Communications Interface Module (SCI)
MC68HC908GP32 Data Sheet, Rev. 10
138 Freescale Semiconductor
Figure 13-5. SCI Receiver Block Diagram
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
WAKEUP
LOGIC
PARITY
CHECKING
MSB
SCI DATA REGISTER
R8
ORIE
NEIE
FEIE
PEIE
RWU
SCRF
IDLE
OR
NF
FE
PE
INTERNAL BUS
PRE-
SCALER
BAUD
DIVIDER
÷ 4
÷ 16
SCP1
SCP0
SCR1
SCR2
SCR0
CGMXCLK
BUS CLOCK
SL
X
SCIBDSRC
FROM
CONFIG2
PTE1/RxD
ERROR CPU
INTERRUPT REQUEST
SL = 0 => SCICLK = CGMXCLK
SL = 1 => SCICLK = BUS CLOCK