MC68HC05C8A Datasheet, PDF (51/116 Pages) Motorola, Inc – Microcontrollers

SCI Operation
INTERNAL DATA BUS
16X
BAUD RATE
÷³16
CLOCK
PD0/
PIN BUFFER
RDI
AND CONTROL
DATA
RECOVERY
NF
SCDR ($0011)
RECEIVE SHIFT REGISTER
876543210
SCI
INTERRUPT
REQUEST
FE
R8
RE
M
SCI
TRANSMIT
REQUESTS
RDRF
RIE
OR
RIE
IDLE
ILIE
WAKEUP
LOGIC
RWU
BIT 7 6
5
4
3
2
1 BIT 0
BAUD RATE REGISTER (BAUD) 0
0 SCP1 SCP0 0 SCR2 SCR1 SCR0 $000D
SCI CONTROL REGISTER 1 (SCCR1) R8
T8
0
M WAKE 0
0
0 $000E
SCI CONTROL REGISTER 2 (SCCR2) TIE TCIE RIE ILIE TE RE RWU SBK $000F
SCI STATUS REGISTER (SCSR) TDRE TC RDRF IDLR OR NF FE
0 $0010
SCI DATA REGISTER (SCDR) BIT 7 BIT 6 BIT 5 BIT 4 BIT 3 BIT 2 BIT 1 BIT 0 $0011
Figure 9-3. SCI Receiver
MC68HC05C8A • MC68HCL05C8A • MC68HSC05C8A Data Sheet, Rev. 5.1
Freescale Semiconductor
51