Serial Communications Interface (SCI)
C2000 Microcontroller Workshop - Communications 13 - 9
Serial Communications Interface (SCI)
The SCI module is a serial I/O port that permits Asynchronous communication between the C28x
and other peripheral devices. The SCI transmit and receive registers are both double-buffered to
prevent data collisions and allow for efficient CPU usage. In addition, the C28x SCI is a full
duplex interface which provides for simultaneous data transmit and receive. Parity checking and
data formatting is also designed to be done by the port hardware, further reducing software
overhead.
SCI Pin Connections
Transmitter-data
buffer register
SCI Device #1
SCIRXD
SCITXD SCITXD
SCIRXD
SCI Device #2
8
Receiver-data
buffer register
8
Transmitter-data
buffer register
Receiver
shift register
Transmitter
shift register
8
Receiver-data
buffer register
Receiver
shift register
Transmitter
shift register
8
(Full Duplex Shown)
RX FIFO_0
RX FIFO_3
RX FIFO_0
RX FIFO_3
TX FIFO_0
TX FIFO_3
TX FIFO_0
TX FIFO_3
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