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Serial Channel (SIO / UART)

Function explanation : [Function explanation]

Simulation : [SIO baud rate] [SIO output] [UART baud rate] [UART output]

Function explanation

Function explanation

  • The TMPM369FDFG has 4 channels of serial channels (SIO and UART).
  • This device has two modes for the serial channel: one is synchronous communication mode (I/O interface mode: SIO), and the other is asynchronous communication mode (UART mode).
  • The transfer clock frequency can be set variously by the baud rate generator.
  • For transmit and receive, it has a double buffer and maximum 4-byte FIFO.
Function explanation

I/O interface mode

  • The serial communication is performed by three wires comprising of transmit data, receive data, and a clock (two wires if it is either transmit or receive data).
  • Half duplex (receive and transmit are separated) or full duplex (simultaneous transmit and receive) can be selected as transmit mode.
  • You can select a clock edge at the time of reception.
  • You can set Interval time of continuous transfer.

UART mode

  • The two-wire serial communication--transmit data and receive data--is performed; one-wire if it is either transmission or reception.
  • You can select the data length from 7, 8, or 9 bits.
  • The parity bit can be added (except 9-bit length).
  • Using CTS pin enables handshake.

Operation overview

  • The basic clock for the operation is a clock obtained by dividing ΦT0 output from part of the system clock, and dividing it again using the baud rate generator.
  • Upon transmission, data stored in the transmit buffer is output to the TXDx pin from the transmit shift register.
  • When receiving data, the input from the RXDx pin is stored to the receive buffer through the receive shift register.
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