ST7260XX Datasheet, PDF (71/139 Pages) STMicroelectronics – Low speed USB 8-bit MCU family with up to 8K Flash

ST7260xx
Serial communications interface (SCI)
13 Serial communications interface (SCI)
13.1
Introduction
The Serial Communications Interface (SCI) offers a flexible means of full-duplex data
exchange with external equipment requiring an industry standard NRZ asynchronous serial
data format. The SCI offers a very wide range of baud rates using two baud rate generator
systems.
13.2
Main features
● Full duplex, asynchronous communications
● NRZ standard format (Mark/Space)
● Independently programmable transmit and receive baud rates up to 250K baud.
● Programmable data word length (8 or 9 bits)
● Receive buffer full, Transmit buffer empty and End of Transmission flags
● Two receiver wake-up modes:
– Address bit (MSB)
– Idle line
● Muting function for multiprocessor configurations
● Separate enable bits for Transmitter and Receiver
● Four error detection flags:
– Overrun error
– Noise error
– Frame error
– Parity error
● Six interrupt sources with flags:
– Transmit data register empty
– Transmission complete
– Receive data register full
– Idle line received
– Overrun error detected
– Parity error
● Parity control:
– Transmits parity bit
– Checks parity of received data byte
● Reduced power consumption mode
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