If the power on event is selected to be the trigger event to initiate the EQ, VOD, and DCGain configuration to TUSB1044, it is important to pay attention to the power sequence of the TUSB1044 and I²C pull-high power rail. A later power on or not stable of pull-high power rail may lead to concern of not successfully setting the TUSB1044. Under these conditions, it helps to use the attach event to trigger the config to 0x10, 0x11, 0x20, 0x21, and 0x0C to secure the successful configuration to the redriver.

Figure 6-5 Example of Invalid I²C Write Region

Figure 6-6 Example of TUSB1044 Re-config Upon Attach Event

Figure 6-7 shows where the data sheet required items to achieve lower power consumption in shut down mode.

Figure 6-7 Power Consumption Information

There is a special notice on the conditions to achieve lower power consumption for a certain shutdown or sleep mode of the system, that CTL1, CTL0, and I2C_EN = 0. It indicates that a special pull-high power rail design for the three IOs to achieve shutdown mode power of TUSB1044 must be considered in the design, especially when I²C control is enabled (pull high I2C_EN).