Texas Instruments TUSB1142 User manual

User’s Guide
TUSB1142 EVM User's Guide
ABSTRACT
The TUSB1142 is a 10 Gbps USB 3.2 linear redriver with 1:2 DeMUX or 2:1 Mux function for USB Type-C™
applications. The TUSB1142 is intended to reside between a USB Type-A Host and a USB Type-C receptacle
or between a USB device and a USB Type-C receptacle. This document describes how to use and configure
the TUSB1142EVM along with recommendations for system hardware implementation. These recommendations
are only guidelines and it is the designer’s responsibility to consider all system characteristics and requirements.
Engineers should refer to the data sheet for technical details such as device operation, terminal description, and
so forth.
Table of Contents
1 Overview..................................................................................................................................................................................2
1.1 What is the TUSB1142 EVM?............................................................................................................................................ 2
1.2 What is Included in the TUSB1142 EVM?..........................................................................................................................2
1.3 What Does the EVM Look Like?........................................................................................................................................ 2
2 Hardware Configuration.........................................................................................................................................................3
2.1 Power................................................................................................................................................................................. 3
2.2 Configuration Jumpers....................................................................................................................................................... 3
2.3 CEQ Configuration............................................................................................................................................................. 5
2.4 SSEQ Configuration...........................................................................................................................................................5
2.5 Local I2C Access............................................................................................................................................................... 6
3 Quick Start Guide....................................................................................................................................................................7
4 Schematics..............................................................................................................................................................................8
Trademarks
USB Type-C™ is a trademark of USB Implementers Forum.
All trademarks are the property of their respective owners.
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1 Overview
1.1 What is the TUSB1142 EVM?
The TUSB1142EVM is a PCB created to help for customers to evaluate the TUSB1142. The EVM has a USB
Type-B receptacle and a USB Type-C receptacle. The user of the EVM can insert a USB 3 Micro-B cable to the
TUSB1142EVM board then connect to a USB 3 Gen 1/2 motherboard or system with a USB Type-A receptacle.
The user can insert a USB device directly or thru a USB Type-C cable into the receptacle side of the EVM board.
1.2 What is Included in the TUSB1142 EVM?
The major components of the EVM are as follows:
• TUSB1142 device
• USB Micro-B receptacle connector
• USB Type-C receptacle connector
• Headers for configurating various TUSB1142 features
1.3 What Does the EVM Look Like?
Figure 1-1. EVM Board
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2 Hardware Configuration
2.1 Power
The EVM board can be powered from either the Micro-B receptacle (J1) VBUS or from an external power supply
through the barrel jack (J2). The EVM defaults to being powered from the Micro-B receptacle VBUS.
If powering EVM from barrel jack, make sure R54 is unpopulated. Once removed, a jumper will need to be
placed across JMP19 pins 1 and 2.
The USB Type-C receptacle VBUS uses TPS25820 as the VBUS power switch needed for USB Type-C
systems. Power is sourced from the Micro-B receptacle VBUS by default. JMP1 can be used to change the
power source at the USB Type-C receptacle VBUS pins.
If powering USB Type-C VBUS from barrel jack or other source, make sure R14 is unpopulated. Once removed,
a jumper will need to be placed across JMP1 pins 1 and 2 to use power form the barrel jack. If a different
external power source is used, connect the source directly to JMP 1 pin 2.
Note
Limit VBUS voltage and voltage from barrel jack to no more than 6 V.
2.2 Configuration Jumpers
Multiple jumpers are provided on the EVM for configuration of TUSB1142 and also for probe points.
The following is a list of 4-level jumpers which are used to configure the TUSB1142: JMP6, JMP7, JMP8, JMP9,
JMP10, JMP11, JMP12, and JMP13. The jumper position to select between the different levels is detailed in
4-level Configuration Jumper Settings Table.
Note
4-level pins are sampled on rising edge of EN pin. Therefore, a change in any 4-level pin state will not
be applied until after EN pin is toggled from low to high.
Table 2-1. 4-Level Configuration Jumper Settings
Jumper Position 4-level State
Short 5 to 6 0
Short 3 to 4 R
Open F
Short 1 to 2 1
Table 2-2. Jumpers
Jumper Default Position Description
JMP2 Open CC1. Pin 1 is probe point for CC1
JMP3 Open CC2. Pin 1 is probe point for CC2
JMP4 Short 3 to 4 FLIP/SCL.
If TUSB1142 is configured for I2C mode (MODE pin (JMP13)) is floating, then jumper is
clock for local I2C. Ensure R19 is populated.
If TUSB1142 is configured for pin-strap mode, then this jumper controls the internal 2:1
mux.
• By default this pin is controleld be U2 based on the CC pin configuration.
If manual control is desired, ensure that R19 is populated :
• Short 1 to 2: CRX1 -> SSRX and SSTX -> CTX1.
• Short 3 to 4: CRX2 -> SSRX and SSTX -> CTX2
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Table 2-2. Jumpers (continued)
Jumper Default Position Description
JMP5 Short 1 to 2 AEQENZ/SDA.
If TUSB1142 is configured for I2C mode (MODE pin (JMP13)) is floating, then jumper is
data for local I2C.
If TUSB1142 is configured for pin-strap mode, then jumper selects whether AEQ is
enabled or not.
• Short 1 to 2: AEQ disabled.
• Short 3 to 4: AEQ enabled.
JMP6 Open SSEQ1/A1.
If TUSB1142 is configured for I2C mode (MODE pin (JMP13)) is floating, then this jumper
along with JMP6 will select the 7-bit I2C target address. Refer to TUSB1142 data sheet
for details on available I2C target address options.
If TUSB1142 is configured for pin-strap mode, then this jumper along with JMP6 selects
EQ settings for SSTX receivers. Refer to TUSB1142 data sheet for details on EQ settings.
JMP7 Open SSEQ0/A0.
If TUSB1142 is configured for I2C mode (MODE pin (JMP13)) is floating, then this jumper
along with JMP5 will select the 7-bit I2C target address. Refer to TUSB1142 data sheet
for details on available I2C target address options.
If TUSB1142 is configured for pin-strap mode, then this jumper along with JMP5 selects
EQ settings for SSTX receivers. Refer to TUSB1142 data sheet for details on EQ settings.
JMP8 Open EQCFG.
If TUSB1142 is configured for I2C mode (MODE pin (JMP13)) is floating, then this jumper
must be left floating for normal operation.
If TUSB1142 is configured for pin-strap mode, then this jumper will select EQ options for
SSTX receiver and CRX receivers. Refer to TUSB1142 data sheet for details.
JMP9 Open AEQCFG.
Selects upper limit for AEQ. Refer to TUSB1142 data sheet for details.
JMP10 Open CEQ1.
If TUSB1142 is configured for pin-strap mode, then this jumper along with JMP10 selects
EQ settings for CRX receivers. Refer to TUSB1142 data sheet for details on EQ settings.
JMP11 Open CEQ0.
If TUSB1142 is configured for pin-strap mode, then this jumper along with JMP10 selects
EQ settings for CRX receivers. Refer to TUSB1142 data sheet for details on EQ settings.
JMP12 Short 1 to 2 MODE.
Selects between pin-strap and I2C mode. The default is pin-strap mode.
• Short 1 to 2: Pin-strap mode
• Open: I2C mode.
JMP13 Open VIO_SEL.
Selects whether local I2C interface is at 1.8 V or 3.3 V signalling levels. The default is 3.3
V. Short pins 1 and 2 to select 1.8 V.
JMP14 Open SLP_S0#.
JMP15 Short 3 to 4 EN.
The EN will enable or disable the TUSB1142.
By default this jumper is configured for confrim from U2
JMP16 Open TPS25820 CHG pin.
Used to select between standard USB or 1.5-A Type-C current sourcing ability.
JMP17 Open TPS25820 Faultz pin.
Used to montior fualt condition on USB Type-C receptacle VBUS.
JMP18 Open TPS25820 EN pin.
Logic input to turn TPS25820 (U2) device on and off
JMP19 Open Power for TUSB1142.
Selects whether TUSB1142 is powered from VBUS or 5 V barrel jack. The default is
power from USB VBUS. Shorting between position 1 and 2 will select the 5 V barrel jack.
JMP20 Open The local I2C voltage pull-up option. The default is local I2C pull-ups are connected to
TUSB1142's 3.3 V VCC supply. Removing R47 allows for feeding external DC supply for
local I2C.
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2.3 CEQ Configuration
There are sixteen EQ settings with 0 being the lowest and Fh being the highest.
Table 2-3. USB Connector Facing Port Receiver (CRX1 and CRX2 pins) Equalization Control
Register(s): CEQ1_SEL or CEQ2_SEL
Equalization Setting # CEQ1 PIN Level CEQ0 PIN Level
EQ Gain at 5 GHz minus
Gain at 100 MHz
(dB)
0 0 0 Lowest EQ setting.
1 0 R
2 0 F
3 0 1
4 R 0
5 R R
6 R F
7 R 1
8 F 0
9 F R
10 F F
11 F 1
12 1 0
13 1 R
14 1 F
15 1 1 Highest EQ setting
2.4 SSEQ Configuration
There are sixteen EQ settings with 0 being the lowest and Fh being the highest.
Table 2-4. USB Host Facing Port Receiver (SSTX1 and SSTX2 pins) Equalization Control
Register(s): SSEQ1_SEL or SSEQ2_SEL
Equalization Setting # SSEQ1 PIN LEVEL SSEQ0 PIN LEVEL
EQ Gain at 5 GHz minus
Gain at 100 MHz
(dB)
0 0 0 Lowest Setting
1 0 R
2 0 F
3 0 1
4 R 0
5 R R
6 R F
7 R 1
8 F 0
9 F R
10 F F
11 F 1
12 1 0
13 1 R
14 1 F
15 1 1 Highest Setting
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2.5 Local I2C Access
Access to TUSB1142’s local I2C signals is provided through the JMP4 and JMP5 connectors. The TUSB1142
supports either 1.8 V and 3.3 V LVCMOS levels. The TUSB1142 VIO_SEL pin (JMP13) is used to select which
voltage level is used. It is important that the I2C signalling levels meet the TUSB1142 LVCMOS levels when I2C
interface is accessed through the connector.
When the MODE pin (JMP12) is floating, TUSB1142 will be enabled for I2C mode. The TUSB1142 I2C target
address is determined by sampled state of SSEQ0/A0 (JMP7) and SSEQ1/A1 (JMP6).
A standalone external I2C host can be connected for debug and control purposes. An example of an external
I2C Host controller is the Total Phase Aardvark I2C/SPI Host Adapter (Total Phase Part#: TP240141).
Table 2-5. TUSB1142 I2C Target Address
SSEQ1/A1
PIN LEVEL
SSEQ0/A0
PIN LEVEL 7-bit Address Bit 7 (MSB) Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 (W/R)
0 0 44h 1 0 0 0 1 0 0 0/1
0 R 45h 1 0 0 0 1 0 1 0/1
0 F 46h 1 0 0 0 1 1 0 0/1
0 1 47h 1 0 0 0 1 1 1 0/1
R 0 20h 0 1 0 0 0 0 0 0/1
R R 21h 0 1 0 0 0 0 1 0/1
R F 22h 0 1 0 0 0 1 0 0/1
R 1 23h 0 1 0 0 0 1 1 0/1
F 0 10h 0 0 1 0 0 0 0 0/1
F R 11h 0 0 1 0 0 0 1 0/1
F F 12h 0 0 1 0 0 1 0 0/1
F 1 13h 0 0 1 0 0 1 1 0/1
1 0 Ch 0 0 0 1 1 0 0 0/1
1 R Dh 0 0 0 1 1 0 1 0/1
1 F Eh 0 0 0 1 1 1 0 0/1
1 1 Fh 0 0 0 1 1 1 1 0/1
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3 Quick Start Guide
The following instructions assume the EVM is configured for pin-strap mode and is powered from the VBUS.
1. Insert Micro-B USB cable into the Micro-B receptacle (J1) and connect the Type-A receptacle of the
motherboard to the EVM through the same cable.
2. Insert a USB-C cable or USB device into the USB-C receptable side of the EVM.
3. The USB device should enumerate. If USB device does not enumerate, check to ensure the FLIP pin (JMP4)
is set based on the CC pin orientation.
The instructions below assume the EVM is configured for I2C mode and is powered from the barrel jack.
1. Insertion +5 V DC Power source into barrel jack (J1).
2. Configure TUSB1142 through the I2C interface, JMP4, and JMP5.
3. Insert the Micro-B USB cable into the Micro-B receptacle (J1) and connect the Type-A receptacle of the
motherboard to the EVM through the same cable.
Note
For I2C operation, ensure that R19 is populated.
4. Insert a USB-C cable or USB device into the USB-C receptable side of the EVM.
5. The USB device should enumerate. If the USB device does not enumerate, check to ensure the FLIP pin
(JMP4) is set based on the CC pin orientation.
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4 Schematics
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