mc68hc908mr32 Freescale Semiconductor, Inc, mc68hc908mr32 Datasheet - Page 159

• Manufacturer Part Number: mc68hc908mr32
• Description: M68hc08 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

13.3 Functional Description
Figure 13-2
communication among the MCU and remote devices, including other MCUs. The transmitter and receiver
of the SCI operate independently, although they use the same baud rate generator. During normal
operation, the CPU monitors the status of the SCI, writes the data to be transmitted, and processes
received data.
Freescale Semiconductor
PTF4/RxD
shows the structure of the SCI module. The SCI allows full-duplex, asynchronous, NRZ serial
SCTIE
SCRIE
RWU
TCIE
SBK
ILIE
TE
RE
f
OP
SHIFT REGISTER
REGISTER
SCI DATA
RECEIVE
÷ 4
CONTROL
MC68HC908MR32 • MC68HC908MR16 Data Sheet, Rev. 6.1
WAKEUP
Figure 13-2. SCI Module Block Diagram
SCTE
SCRF
IDLE
SCALER
TC
ENSCI
PRE-
GENERATOR
BAUD RATE
÷ 16
CONTROL
RECEIVE
INTERNAL BUS
LOOPS
BKF
RPF
DATA SELECTION
CONTROL
OR
NF
FE
PE
FLAG
CONTROL
WAKE
ILTY
PEN
LOOPS
PTY
ENSCI
M
TRANSMIT
CONTROL
SHIFT REGISTER
TXINV
ORIE
NEIE
FEIE
PEIE
R8
REGISTER
TRANSMIT
T8
SCI DATA
Functional Description
PTF5/TxD
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