MC68HCP11 Datasheet, PDF (24/45 Pages) Motorola, Inc – 8-Bit Microcontroller

RECEIVER
BAUD RATE
CLOCK
PD0
RxD
DDD0
÷16
PIN BUFFER
AND CONTROL
DATA
RECOVERY
DISABLE
DRIVER
RE
10 (11) - BIT
Rx SHIFT REGISTER
(8) 7 6 5 4 3 2 1 0
MSB
ALL ONES
M
WAKEUP
LOGIC
RWU
8
SCCR1 SCI CONTROL 1
SCSR SCI STATUS 1
RDRF
RIE
IDLE
ILIE
OR
RIE
SCCR2 SCI CONTROL 2
SCDR Rx BUFFER
(READ ONLY)
8
8
SCI Tx
REQUESTS
SCI INTERRUPT
REQUEST
Figure 7 SCI Receiver Block Diagram
INTERNAL
DATA BUS
11 SCI RX BLOCK
MOTOROLA
24
MC68HC11A8
MC68HC11A8TS/D