mc68hc11e0fnr2 Freescale Semiconductor, Inc, mc68hc11e0fnr2 Datasheet - Page 108

• Manufacturer Part Number: mc68hc11e0fnr2
• Description: Hc11 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

Serial Communications Interface (SCI)
108
SEE NOTE
Note: Refer to
BAUD RATE
RECEIVER
CLOCK
REQUESTS
SCI Tx
PD0
RxD
Figure B-1. EVBU Schematic Diagram
SCCR1 SCI CONTROL 1
SCI INTERRUPT
AND CONTROL
PIN BUFFER
REQUEST
DDD0
DISABLE
DRIVER
Figure 7-2. SCI Receiver Block Diagram
WAKEUP
LOGIC
M68HC11E Family Data Sheet, Rev. 5.1
RE
M
RECOVERY
RDRF
RIE
IDLE
ILIE
OR
RIE
DATA
÷16
for an example of connecting RxD to a PC.
SCSR SCI STATUS 1
SCCR2 SCI CONTROL 2
(8) 7 6 5 4 3 2 1 0
Rx SHIFT REGISTER
RWU
10 (11) - BIT
MSB
8
SCDR Rx BUFFER
INTERNAL
DATA BUS
Freescale Semiconductor
8
8
READ ONLY
ALL 1s