SNLS708 February 2023 DS90UB638-Q1
PRODUCTION DATA
The SCL High Time register field configures the high pulse width of the I2C SCL output when the Serializer is the Controller on the local I2C bus. Units are 40 ns for the nominal oscillator clock frequency. The default value is set to approximately 100 kHz with the internal oscillator clock running at nominal 25 MHz. Delay includes 4 additional oscillator clock periods. The internal oscillator has ±10% variation when REFCLK is not applied, which must be taken into account when setting the SCL High and Low Time registers.
BIT | FIELD | TYPE | DEFAULT | DESCRIPTION |
---|---|---|---|---|
7:0 | SCL_HIGH_TIME | RW | 0x7A | I2C Controller SCL high time Default set to approximately 100 kHz when REFCLK = 25 MHz. Nominal High Time = 40 ns × (SCL HIGH TIME + 4) |