MC68HC908GR8A_07 Datasheet, PDF (134/260 Pages) Freescale Semiconductor, Inc – Microcontrollers

Serial Communications Interface (SCI) Module
INTERNAL BUS
PTE1/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
CONFIG2
WAKEUP
CONTROL
ENSCI
CGMXCLK
BUS CLOCK
A
B
SL
X
÷4
SL = 0 => SCICLK = CGMXCLK
SL = 1 => SCICLK = BUS CLOCK
PRE-
SCALER
TXINV
R8
T8
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
PTE0/TxD
Figure 13-3. SCI Module Block Diagram
MC68HC908GR8A • MC68HC908GR4A Data Sheet, Rev. 5
134
Freescale Semiconductor