MC68HC11KW1 Datasheet, PDF (131/238 Pages) Motorola, Inc – High-density complementary metal oxide semiconductor HCMOS) microcontroller unit

T8 SCDRH/SCDRL (transmit buffer)
LOOPS
WOMS
†
M
WAKE
ILT
PE
PT
10/11-bit TX shift register
H87
0L
LOOPS
M
PE
PT
TE
SBK
Transmitter
control
EXTAL
TXD
WOMS
TIE
TCIE
RIE
ILIE
TE
RE
RWU
SBK
Flag control
WAKE
PE
PT
RE
RWU
M
LOOPS
ILT
Receiver
control
7
WOMS
10/11-bit RX shift register _Data
87
0
recovery
STOP
START
R8 SCDRH/SCDRL (receive buffer)
RXD
SCSR1
SCSR2
OR
RIE ^&
IDLE
ILIE ^&
RDRF
RIE ^&
TC
TCIE ^&
TDRE
TIE ^&
+
SCI interrupt request
Note: † = always reads as zero
Internal data bus
Figure 7-2 SCI block diagram
MC68HC11KW1
SERIAL COMMUNICATIONS INTERFACE
7-3