MC68HC908LJ12 Datasheet, PDF (233/413 Pages) Freescale Semiconductor, Inc – 8-bit microcontroller units

Infrared Serial Communications
13.7 SCI Functional Description
Figure 13-5 shows the structure of the SCI.
INTERNAL BUS
SCI_RxD
SCI DATA
REGISTER
RECEIVE
SHIFT REGISTER
SCI DATA
REGISTER
TRANSMIT
SHIFT REGISTER
SCI_TxD
SCTIE
TCIE
SCRIE
ILIE
TE
RE
RWU
SBK
SCTE
TC
SCRF
IDLE
WAKEUP
CONTROL
R8
T8
DMARE
DMATE
OR
NF
FE
PE
RECEIVE
CONTROL
LOOPS
FLAG
CONTROL
LOOPS
ENSCI
ORIE
NEIE
FEIE
PEIE
TRANSMIT
CONTROL
CKS
CGMXCLK
BUS CLOCK
A
B
SL
X
SL = 0 => X = A
SL = 1 => X = B
SCI_R32XCLK
SCI_R16XCLK
ENSCI
BAUD RATE
GENERATOR
÷ 16
BKF
M
RPF
WAKE
ILTY
PEN
PTY
DATA SELECTION
CONTROL
Figure 13-5. SCI Module Block Diagram
Technical Data
234
MC68HC908LJ12 — Rev. 2.1
Infrared Serial Communications Interface Module (IRSCI) Freescale Semiconductor