mc68hc11e0fnr2 Freescale Semiconductor, Inc, mc68hc11e0fnr2 Datasheet - Page 106

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

Serial Communications Interface (SCI)
106
Note: Refer to
REQUESTS
TRANSMITTER
BAUD RATE
SCI Rx
CLOCK
Figure B-1. EVBU Schematic Diagram
SCCR1 SCI CONTROL 1
SCI INTERRUPT
REQUEST
H (8) 7 6 5 4 3 2 1 0 L
10 (11) - BIT Tx SHIFT REGISTER
Figure 7-1. SCI Transmitter Block Diagram
SCDR Tx BUFFER
M68HC11E Family Data Sheet, Rev. 5.1
TDRE
TIE
TC
TCIE
CONTROL LOGIC
TRANSMITTER
SCSR INTERRUPT STATUS
for an example of connecting TxD to a PC.
WRITE ONLY
SCCR2 SCI CONTROL 2
DIRECTION (OUT)
FORCE PIN
8
AND CONTROL
PIN BUFFER
DDD1
8
INTERNAL
DATA BUS
8
Freescale Semiconductor
PD1
TxD
SEE NOTE