ST72F63 STMICROELECTRONICS [STMicroelectronics], ST72F63 Datasheet - Page 55

• Manufacturer Part Number: ST72F63
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

11.3 SERIAL COMMUNICATIONS INTERFACE (SCI)
11.3.1 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.
11.3.2 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
Five interrupt sources with flags:
– Transmit data register empty
– Transmission complete
– Receive data register full
– Idle line received
– Overrun error detected
Parity control:
– Transmits parity bit
– Checks parity of received data byte
Reduced power consumption mode
11.3.3 General Description
The interface is externally connected to another
device by two pins (see
– TDO: Transmit Data Output. When the transmit-
– RDI: Receive Data Input is the serial data input.
Through these pins, serial data is transmitted and
received as frames comprising:
– An Idle Line prior to transmission or reception
– A start bit
– A data word (8 or 9 bits) least significant bit first
– A Stop bit indicating that the frame is complete.
ter and the receiver are disabled, the output pin
returns to its I/O port configuration. When the
transmitter is enabled and nothing is to be trans-
mitted, the TDO pin is at high level.
Oversampling techniques are used for data re-
covery by discriminating between valid incoming
data and noise.
Figure
36):
ST7263B
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