SWCU193 April 2023 CC2340R2 , CC2340R5 , CC2340R5-Q1
The I2C bus can run in either standard mode (100 kbps) or fast mode (400 kbps). The selected mode must match the speed of the other I2C devices on the bus.
Standard and fast modes are selected using a value in the I2C Controller Timer Period I2C.CTPR register that results in an SCL frequency of 100 kbps for standard mode, or 400 kbps for fast mode.
The I2C clock rate is determined by the parameters CLK_PRD, TPR, SCL_LP, and SCL_HP where: