Datasheet

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