MC68HC908GR8 Datasheet, PDF (163/286 Pages) Freescale Semiconductor, Inc – M68HC08 Microcontrollers

INTERNAL BUS
Functional Description
PE1/RxD
SCI DATA
REGISTER
RECEIVE
SHIFT REGISTER
SCI DATA
REGISTER
TRANSMIT
SHIFT REGISTER
SCTIE
TCIE
SCRIE
ILIE
TE
RE
RWU
SBK
SCTE
TC
SCRF
IDLE
SCIBDSRC
FROM
CONFIG
WAKEUP
CONTROL
ENSCI
CGMXCLK
IT12
A
B
SL
X
÷4
SL = 0 => X = A
SL = 1 => X = B
PRE-
SCALER
TXINV
R8
T8
DMARE
DMATE
OR
NF
FE
PE
RECEIVE
CONTROL
LOOPS
FLAG
CONTROL
LOOPS
ENSCI
ORIE
NEIE
FEIE
PEIE
TRANSMIT
CONTROL
BKF
RPF
BAUD
DIVIDER
M
WAKE
ILTY
PEN
PTY
∏ ÷ 16
DATA SELECTION
CONTROL
PE2/TxD
Figure 18-1. SCI Module Block Diagram
MC68HC908GR8 • MC68HC908GR4 Data Sheet, Rev. 7
Freescale Semiconductor
163