s908az32ag2cfue Freescale Semiconductor, Inc, s908az32ag2cfue Datasheet - Page 140

• Manufacturer Part Number: s908az32ag2cfue
• Description: M68hc08 Microcontrollers 8-bit Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

Serial Communications Interface (SCI)
16.4 Functional Description
Figure 16-1
communication between 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.
140
RxD
CGMXCLK
shows the structure of the SCI module. The SCI allows full-duplex, asynchronous, NRZ serial
SCTIE
SCRIE
RWU
TCIE
SBK
ILIE
RE
TE
SHIFT REGISTER
REGISTER
SCI DATA
RECEIVE
÷ 4
Generic Pin Names
CONTROL
Full Pin Names
WAKEUP
SCTE
SCRF
Figure 16-1. SCI Module Block Diagram
IDLE
SCALER
TC
ENSCI
PRE-
Table 16-1. Pin Name Conventions
MC68HC908AZ32A Data Sheet, Rev. 2
GENERATOR
BAUD RATE
÷ 16
CONTROL
RECEIVE
INTERNAL BUS
PTE1/SCRxD
LOOPS
RxD
BKF
RPF
DATA SELECTION
CONTROL
OR
NF
FE
PE
FLAG
CONTROL
WAKE
LOOPS
ILTY
PEN
PTY
PTE0/SCTxD
ENSCI
M
TxD
TRANSMIT
CONTROL
SHIFT REGISTER
TXINV
ORIE
NEIE
PEIE
FEIE
R8
REGISTER
TRANSMIT
T8
SCI DATA
Freescale Semiconductor
TxD