Datasheet

Serial Communications Interface Module (SCI)
MC68HC812A4 Data Sheet, Rev. 7
152 Freescale Semiconductor
14.3 Block Diagram
Figure 14-1. SCI Block Diagram
SCI DATA
RECEIVE
SHIFT REGISTER
SCI DATA
REGISTER
TRANSMIT
SHIFT REGISTER
REGISTER
BAUD RATE
GENERATOR
SBR[12:0]
RXD
MODULE
TRANSMIT
CONTROL
³16
RECEIVE
AND WAKEUP
DATA FORMAT
CONTROL
CONTROL
T8
PF
FE
NF
RDRF
IDLE
TIE
OR
TCIE
TDRE
TC
R8
RAF
LOOPS
RWU
RE
PE
ILT
PT
WAKE
M
CLOCK
SCI
ILIE
RIE
SCI
SCI
SCI
INTERRUPT
INTERRUPT
INTERRUPT
INTERRUPT
RSRC
SBK
LOOPS
TE
RSRC
REQUEST
REQUEST
REQUEST
REQUEST
WOMS
PORT S DATA
DIRECTION REGISTER
PORT S DATA REISTER
3 210
PIN CONTROL LOGIC
TXD1
RXD1
TXD0
RXD0
TXD
RXD TO SCI1
TXD FROM SCI1