MC68HC812A4 Datasheet, PDF (236/342 Pages) Motorola, Inc – 16-bit device composed of standard on-chip peripheral modules connected by an intermodule bus. Modules include

Serial Communications Interface Module (SCI)
14.6.4 Receiver
A block diagram of the SCI receiver is shown in Figure 14-5.
INTERNAL BUS
SBR12–SBR0
SCI DATA REGISTER
MODULE
CLOCK
BAUD DIVIDER
RXD
FROM TXD PIN
OR TRANSMITTER
LOOPS
RSRC
DATA
RECOVERY
LOOP
CONTROL
RE
RAF
M
WAKE
ILT
WAKEUP
LOGIC
PE
PARITY
PT
CHECKING
IDLE
SCI INTERRUPT REQUEST
ILIE
SCI INTERRUPT REQUEST
RIE
11-BIT RECEIVE SHIFT REGISTER
H876543210L
FE
NF
RWU
PE
R8
RDRF
OR
Figure 14-5. SCI Receiver Block Diagram
MC68HC812A4 — Rev. 3.0
236
Serial Communications Interface Module (SCI)
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