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TUSB1146 Datasheet(PDF) 26 Page - Texas Instruments

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Part # TUSB1146
Description  TUSB1146-Q1 Automotive DisplayPort™ Alt Mode Over USB Type-C® Source 10Gbps Linear Redriver Crosspoint Switch
PDF  69 Pages
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

TUSB1146 Datasheet(HTML) 26 Page - Texas Instruments

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6.4.2 Device Configuration In I2C Mode
The TUSB1146-Q1 is in I2C mode when I2C_EN is not equal to “0” or when I2C_EN = "F" and EQ0 = "0" and
EQ1 = "0". The same configurations defined in GPIO mode are also available in I2C mode. The TUSB1146-Q1
USB3.2 and DisplayPort configuration is controlled based on Table 6-5. The AUXp or AUXn to SBU1 or SBU2
mapping control is based on Table 6-6.
Table 6-5. I2C Configuration Control
REGISTERS
TUSB1146-Q1 CONFIGURATION
VESA DisplayPort ALT MODE
DFP_D CONFIGURATION
CTLSEL1
CTLSEL0
FLIPSEL
0
0
0
Power Down
—
0
0
1
Power Down
—
0
1
0
One Port USB 3.2 - No Flip
—
0
1
1
One Port USB 3.2 – With Flip
—
1
0
0
4 Lane DP - No Flip
C and E
1
0
1
4 Lane DP – With Flip
C and E
1
1
0
One Port USB 3.2 + 2 Lane DP- No Flip
D
1
1
1
One Port USB 3.2 + 2 Lane DP– With Flip
D
Table 6-6. I2C AUXp or AUXn to SBU1 or SBU2 Mapping
REGISTERS
MAPPING
AUX_SBU_OVR
1
AUX_SBU_OVR0
CTLSEL1
FLIPSEL
0
0
1
0
AUXp → SBU1
AUXn → SBU2
0
0
1
1
AUXp → SBU2
AUXn → SBU1
0
0
0
X
Open
0
1
X
X
AUXp → SBU1
AUXn → SBU2
1
0
X
X
AUXp → SBU2
AUXn → SBU1
1
1
X
X
Open
6.4.3 DisplayPort Mode
The TUSB1146-Q1 supports up to four DisplayPort lanes at datarates up to 10Gbps. TUSB1146-Q1 can be
enabled for DisplayPort through GPIO control or through I2C register control. When I2C_EN is ‘0’, DisplayPort is
controlled based on Table 6-2. When not in GPIO mode, enable of DisplayPort functionality is controlled through
I2C registers.
TUSB1146-Q1
SLLSFZ7 – FEBRUARY 2025
www.ti.com
26
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Copyright © 2025 Texas Instruments Incorporated
Product Folder Links: TUSB1146-Q1



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