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Serial Bus Interface (SBI)

Function explanation : [Function explanation]

Simulation : [SIO serial clock frequency] [SIO output] [I2C output clock frequency] [I2C output]

Function explanation

Function explanation

  • The TMPM369FDFG has three-channels of serial bus interface (I2C/SIO) channels.
  • The serial bus interface has two modes as follows: I2C bus mode and the Clock-synchronous 8-bit SIO mode.
Function explanation
  • I2C bus mode
    • The communication method is compliant with the Philips Semiconductors Inter-Integrated Circuit specification.
    • This mode has two bus lines, data line (SDA) and clock line (SCL), and has a slave address which is the data to specify the communication target. Therefore, two or more devices can be connected in one pair of communication line.
    • The communication starts in the SDA/SCL status called start condition, and the communication ends in the status called stop condition.
  • Clock-synchronous 8-bit SIO mode
    • Three-wire clock-synchronous serial communication is performed according to the transmit data (SO), receive data (SI), and clock (SCK).
    • There are a receive mode, transmit mode, and transmit and receive mode.
    • The data length is fixed to 8 bits.

Operation overview

  • The basic clock for the operation is a clock obtained by dividing the system clock, fsys.
  • When transmitting, the data stored in the transmit buffer is output from the transmit shift register to the TXDx pin.
  • When receiving, the input from the RXDx pin is stored in the receive buffer through the receive shift register.
  • In the I2C mode, the contents of the I2C bus address register are output as the slave address in the transmission. In the reception, the data are fetched when the received slave address matches with the I2C bus address register.
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