MC68HC11KA4TS Datasheet, PDF (39/68 Pages) Motorola, Inc – 8-Bit Microcontroller

RECEIVER
BAUD RATE
CLOCK
PD0/
RxD
DDD0
÷16
PIN BUFFER
AND CONTROL
DATA
RECOVERY
DISABLE
DRIVER
RE
SCSR2 SCI STATUS 2
M
WAKE-UP
LOGIC
PARITY
DETECT
10 (11) - BIT
Rx SHIFT REGISTER
(8) 7 6 5 4 3 2 1 0
MSB
ALL ONES
RWU
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
REQUESTS
SCI INTERRUPT
REQUEST
Figure 11 SCI Receiver Block Diagram
INTERNAL
DATA BUS
MC68HC11KA4
MC68HC11KA4TS/D
MOTOROLA
39