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TUSB1146 Datasheet(PDF) 27 Page - Texas Instruments

Part # TUSB1146
Description  TUSB1146 USB Type-C™ DisplayPort™ Alt Mode 10-Gbps Linear Redriver Crosspoint Switch
PDF  68 Pages
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Manufacturer  TI2 [Texas Instruments]
Direct Link  https://www.ti.com
Logo TI2 - Texas Instruments

TUSB1146 Datasheet(HTML) 27 Page - Texas Instruments

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TUSB1146
www.ti.com
SLLSFB2 – APRIL 2020
Product Folder Links: TUSB1146
Submit Documentation Feedback
Copyright © 2020, Texas Instruments Incorporated
8.4.2 Device Configuration In I2C Mode
The TUSB1146 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 USB3.1 and
DisplayPort configuration is controlled based on Table 5. The AUXp or AUXn to SBU1 or SBU2 mapping control
is based on Table 6.
Table 5. I2C Configuration Control
REGISTERS
TUSB1146 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 3.1 - No Flip
—
0
1
1
One Port USB 3.1 – 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 3.1 + 2 Lane DP- No Flip
D
1
1
1
One Port USB 3.1 + 2 Lane DP– With Flip
D
Table 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
8.4.3 DisplayPort Mode
The TUSB1146 supports up to four DisplayPort lanes at datarates up to 10 Gbps (UHBR10). TUSB1146 can be
enabled for DisplayPort through GPIO control or through I2C register control. When I2C_EN is ‘0’, DisplayPort is
controlled based on Table 2. When not in GPIO mode, enable of DisplayPort functionality is controlled through
I2C registers.



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