TUSB1044 datasheet(21/67 Pages) TI1

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TUSB1044

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SLLSF47A – FEBRUARY 2018 – REVISED FEBRUARY 2018

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7.4 Device Functional Modes

7.4.1 Device Configuration in GPIO mode

The TUSB1044 is in GPIO configuration when I2C_EN = “0” or I2C_EN = "F". The TUSB1044 supports

operational combinations with USB and two different Type-C Alternate Modes. One combination includes USB

and Alternate Mode DisplayPort, and the other combination includes USB and custom Alternate Mode. For each

operational combination the data path directions can be further set using the DIR[1:0] pins or through I2C to

enable the device to operate in the source or sink sides. Please refer to Table 2 for all the configuration of all the

operational modes.

When the device is set to operate in a USB and Alternate Mode DisplayPort the following configurations can be

further set: USB3.1 only, 2 DisplayPort lanes + USB3.1, or 4 DisplayPort lanes (no USB3.1). The CTL1 pin

controls whether DisplayPort mode is enabled. The combination of CTL1 and CTL0 selects between USB3.1

only, 2 lanes of DisplayPort, or 4-lanes of DisplayPort as detailed in Table 2. The AUXP/N to SBU1/2 mapping is

controlled based on Table 3..

When the device is set to operate in a USB and custom Alternate Mode, the following configurations can be

further set: USB3.1 only, 2 Channels of custom Alternate Mode + USB3.1, or 4 Channels of custom Alternate

Mode (no USB3.1). The CTL1 pin controls whether custom Alternate Mode is enabled. The combination of CTL1

and CTL0 selects between USB3.1 only, 2 channels of custom Alternate Mode, or 4 channels of custom

Alternate Mode as detailed in Table 2. The AUXP/N to SBU1/2 mapping is controlled based on Table 3.

Further data path direction control can be achieved using the SWAP pin. When set high, the SWAP pin reverses

the data path direction on all the channels and swaps the equalization settings of the upstream and downstream

facing input ports. This pin may be found useful in active cable application with TUSB1044 installed on only one

end. The SWAP pin can be set based on which cable end is plugged to the source or sink side receptacle

After power-up (VCC from 0 V to 3.3 V), the TUSB1044 will default to USB3.1 mode. The USB PD controller,

upon detecting no device attached to Type-C port or USB3.1 operation not required by attached device, must

take TUSB1044 out of USB3.1 mode by transitioning the CTL0 pin from L to H and back to L.

Table 2. GPIO Configuration Control

DIR1

DIR0

CTL1

CTL0

FLIP

TUSB1044 CONFIGURATION

VESA DisplayPort ALT

MODE

DFP_D Configuration

USB + DisplayPort Alternate Mode (Source Side)

Power Down

—

Power Down

—

One Port USB 3.1 - No Flip

—

One Port USB 3.1 – With Flip

—

4 Lane DP - No Flip

C and E

4 Lane DP – with Flip

C and E

One Port USB 3.1 + 2 Lane DP- No

Flip

D and F

One Port USB 3.1 + 2 Lane DP– with

Flip

D and F

USB + DisplayPort Alternate Mode (Sink Side)

Power Down

–

Power Down

–

One Port USB 3.1 - No Flip

–

One Port USB 3.1 – With Flip

–

4 Lane DP - No Flip

C and E

4 Lane DP – With Flip

C and E

One Port USB 3.1 + 2 Lane DP- No

Flip

D and F

One Port USB 3.1 + 2 Lane DP– With

Flip

D and F

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