NB7NPQ7021MMUGAEVB
NB7NPQ7021MMUGAEVB
Evaluation Board User's
Manual
Introduction
The NB7NPQ7021MMUGAEVB evaluation board was
developed to provide a convenient platform to quickly
verify the operation of the NB7NPQ7021M redriver in
a USB type−A system environment.
This evaluation board manual contains:
Information on the NB7NPQ7021M Evaluation
Board
Board Schematics
Bill of Materials
Demo Board
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EVAL BOARD USER’S MANUAL
Part Description
Figure 1. Kit Contents
Board Features
The NB7NPQ7021M is a 3.3 V dual channel, linear
redriver for USB 3.1 applications that supports both 5 and
10 Gbps data rates. Signal integrity degrades from PCB
traces and transmission cables which may cause
inter−symbol interference (ISI). The NB7NPQ7021M
compensates for these losses by engaging varying levels of
equalization at the input receiver. The output transmitter
circuitry provides user selectable flat gain settings to
create the best eye openings for the outgoing data signals.
The flexibility of this part allows it to fit into many system
applications.
After power up, the NB7NPQ7021M periodically
checks both of the TX output pairs for a SuperSpeed USB
receiver. When the receiver is detected, the RX
termination becomes enabled and the NB7NPQ7021M is
set to perform the redriver function.
The NB7NPQ7021M comes in a small 3 mm x 3 mm
UQFN−16 package and is specified to operate across the
entire industrial temperature range, –40C to 85C.
This manual should be used in conjunction with the device
datasheet which contains full technical details on the device
specifications and operation.
Accommodates the Functional Evaluation of the
NB7NPQ7021M
Acts as a Reference Design that Can Easily be
Modified for Active Cables, UFP (Upstream Facing
Port), DFP (Downstream Facing Port), and DRP (Dual
Role Port) Applications
Type−A Plug and Receptacle to Easily Place in the
Existing System Environment
On Board Control Pins for Adjusting Settings
without Compromising Form Factor
Semiconductor Components Industries, LLC, 2017
January, 2017 − Rev. 1
1
Publication Order Number:
NB7NPQ7021MMUGAEVB
BOARD MAP AND FUNCTIONAL SUMMARY
Resistors “R2 and R3”:
These are 0Ω resistors that
connect the USB 2.0 data lines.
These can be removed in order to
guarantee that only the super
speed data lines are active.
Jumper “J1”:
This jumper
connects the 5V
USB bus voltage
to the input of a
3.3V LDO.
Jumper “J2”:
This jumper connects
the 3.3V output of the
LDO to the VCC pins of
the NB7NPQ7021M
Device.
VCC and GND pins:
These pins can be used to measure the
power going to the NB7NPQ7021M
devices. They are used to power the
NB7NPQ7021M directly with a 3.3V
supply and to measure the current
through the device.
EQ and Flat Gain Control pin Jumpers :
These control the EQ and FG settings.
Each 4-level control pin can be set to
“H”, Floating, “R”, or “L”.
Jumpers are provided for CTRL_A0,
CTRL_A1, CTRL_B0, and CTRL_B1.
*Please see the data sheet for the
table of control pin settings and
corresponding EQ and FG.
Figure 2. NB7NPQ7021M Evaluation Board Important Connection Information
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NB7NPQ7021MMUGAEVB
External Power Supply Instructions
Do Not connect
this jumper.
Connecting this jumper
is optional and will not
cause any issues if left
on.
Connect a 3.3V supply to the VCC Pin of
this jumper and the ground to the GND
pin of this jumper. The power Supply
current limit should be set to 200mA.
Figure 3. NB7NPQ7021M Evaluation Board
–
Connecting to an External Power Supply
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NB7NPQ7021MMUGAEVB
Select Power Source
The NB7NPQ7021MMUGAEVB has the flexibility to be powered through USB’s VBUS, or an external power supply.
Table 1 and Figure 3 describe the jumper settings for each of the configurations:
Monitoring Current / Power
There are two easy ways to monitor the current consumed by the redriver. If you are using an external power supply, you
can simply use the current meter commonly found on the power supplies. If you would like to use a current probe, simply
solder the probe between the VCC pin and the power supply. This will allow monitoring of the NB7PQ7021M’s current
consumption.
Step 4: USB 2.0 Data Lines
The USB 2.0 lines can be disconnected by removing the
0Ω resistors R2 and R3 on the D+ and D− lines. This is
useful if you cannot easily tell whether the downstream
facing port has acknowledged a super speed (+)
connection with the inserted loss, or if it stepped down to
high speed data rates. When a receiver is detected through
RxDetect, the DFP will initialize link training. It will send
a test signal out at the highest data rate and expect to see
the same signal sent back
by the UFP. If the signals do not match due to ISI (or any
other connection issues) then it will drop down the data rate
to USB 2.0 speeds.
On Windows machines, an easy way to tell that a super
speed connection was not established is to look for a pop−up
in the task bar letting the user know that “This device can
perform faster”. A disk benchmarking tool like Crystal Disk
Mark that lets you test read and write speeds to a peripheral
storage can also be used.
USB
VBUS
J1
J2
VCC Clip
GND Clip
LDO
Input
LDO
Output
LDO
3.3V
Figure 4. Power Source Selection
Table 1. Selecting a Power Source
USB VBUS
External Supply
Place jumper on J1 and a Jumper on J2
Open J1 and connect positive lead of external
supply to VCC and apply 3.3 V. Ensure that GND
is connected to ground and that current limit is set
to 200mA.
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NB7NPQ7021MMUGAEVB
Complete Board Schematics
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