MC68HC11F1 Datasheet, PDF (43/68 Pages) Motorola, Inc – Technical Summary 8-Bit Microcontroller

RECEIVER
BAUD RATE
CLOCK
DDD0
÷16
PD0
PIN BUFFER
RxD
AND CONTROL
DATA
RECOVERY
DISABLE
DRIVER
RE
10 (11) - BIT
Rx SHIFT REGISTER
H876543210L
ALL
MSB
ONES
WAKEUP
LOGIC
SCCR1 SCI CONTROL 1
SCSR1 SCI STATUS 1
RDRF
RIE
IDLE
ILIE
OR
RIE
SCDR
Rx BUFFER
(READ ONLY)
SCCR2 SCI CONTROL 2
SCI Tx SCI INTERRUPT
REQUESTS REQUEST
Figure 10 SCI Receiver Block Diagram
INTERNAL
DATA BUS
MC68HC11F1/FC0
MC68HC11FTS/D
MOTOROLA
43