TUSB1044AI datasheet(22/66 Pages) TI1

22 / 66 page

AUX writes to the DPCD registers 00101h (LANE_COUNT_SET) and 00600h (SET_POWER_STATE) of the

DisplayPort sink. The TUSB1044A disables or enables lanes based on value written to LANE_COUNT_SET.

The TUSB1044A disables all lanes when SET_POWER_STATE is in the D3. Otherwise, active lanes are based

on the value of LANE_COUNT_SET.

DisplayPort AUX snooping is enabled by default but can be disabled by changing the AUX_SNOOP_DISABLE

various configuration registers.

7.3.4 4-Level Inputs

The TUSB1044A has (I2C_EN, UEQ[1:0], DEQ[1:0], CFG[1:0], and A[1:0]) 4-level inputs pins that are used to

control the equalization gain, voltage linearity range, and place TUSB1044A into different modes of operation.

These 4-level inputs use a resistor divider to help set the four valid levels and provide a wider range of control

settings. There are internal pullup and pulldown resistors. These resistors, together with the external resistor

connection combine to achieve the desired voltage level.

Table 7-2. 4-Level Control Pin Settings

LEVEL

SETTINGS

Option 1: Tie 1KΩ 5% to GND.

Option 2: Tie directly to GND.

Tie 20KΩ 5% to GND.

Float (leave pin open)

Option 1: Tie 1KΩ 5%to VCC.

Option 2: Tie directly to VCC.

Note

All 4-level inputs are latched on rising edge of internal reset. After Tcfg_hd, the internal pullup and

pulldown resistors are isolated to save power.

TUSB1044A

SLLSG07 – MARCH 2025

www.ti.com

Submit Document Feedback

Product Folder Links: TUSB1044A

TUSB1044AI датащи(PDF) 22 Page - Texas Instruments