MC908KX2MDWE Datasheet, PDF (118/210 Pages) Freescale Semiconductor, Inc – High-performance M68HC08 architecture, Fully upward-compatible object code with M6805, M146805, and M68HC05 Families

Serial Communications Interface Module (SCI)
12.4.3 Receiver
Figure 12-6 shows the structure of the SCI receiver.
INTERNAL BUS
BAUDCLK
SCP1
SCP0
÷4
PRE- BAUD
SCALER DIVIDER
SCR1
SCR2
SCR0
÷ 16
RxD
DATA
RECOVERY
ALL 0s
BKF
RPF
SCI DATA REGISTER
11-BIT
RECEIVE SHIFT REGISTER
H876543210L
M
WAKE
ILTY
PEN
PTY
WAKEUP
LOGIC
PARITY
CHECKING
IDLE
ILIE
SCRF
SCRIE
SCRF
RWU
IDLE
R8
ILIE
SCRIE
OR
ORIE
NF
NEIE
FE
FEIE
PE
PEIE
OR
ORIE
NF
NEIE
FE
FEIE
PE
PEIE
Figure 12-6. SCI Receiver Block Diagram
MC68HC908KX8 • MC68HC908KX2 • MC68HC08KX8 Data Sheet, Rev. 2.1
118
Freescale Semiconductor