onsemi Ezairo 7160 SL User manual

EVAL BOARD USER’S MANUAL
www.onsemi.com
©Semiconductor Components Industries, LLC, 2018
September, 2022 −Rev. 4
1Publication Order Number:
EVBUM2581/D
Ezairo)7160 SL Hybrid Demonstrator Board
User's Manual
EVBUM2581/D
BOARD DESIGN & OVERVIEW
Purpose
This manual provides information on the configuration
and use of the Ezairo 7160 SL Hybrid Demonstrator Board.
The demonstrator board is designed to be used with the
Ezairo Preconfigured Suite (Pre Suite), or the Ezairo 7100
Open−Programmable Evaluation and Development Kit
(EDK) to develop wireless−enabled hearing aids based on
the Ezairo 7160 SL.
Manual Organization
The Hybrid Demonstrator Board Manual contains the
following chapters and appendices:
•Chapter 1: Introduction describes the purpose of this
manual, describes the target reader, explains how the
book is organized, and provides a list of suggested reading
for more information.
•Chapter 2: Overview provides an overview of the
Demonstrator Board described in this manual.
•Chapter 3: Configuration provides the details of the
Demonstrator Board. The chapter contains information
on the following topics:
♦Demonstrator Board Setup
♦Demonstrator Board Design
♦Power Supply
♦Level Translators
♦LED Circuitry
♦Promira/CAA Debug Port
♦SWJ−DP Debug Port
♦Digital Input/Output (DIO)
♦Test Points
Further Reading
For any technical information not covered in this manual,
refer to the following documents:
•Promira™Serial Platform Quick Start Guide, available at
totalphase.com
•Communication Accelerator Adaptor Manual, which is
installed with the Communication Accelerator Adaptor
(CAA) software
•Integrated Development Environment User’s Guide
•Introduction to Ezairo 7100 Programming
•CFX DSP Architecture Manual
•Hardware Reference Manual for Ezairo 7100
•HEAR Configurable Accelerator Reference Manual for
Ezairo 7100
•Firmware Reference Manual for Ezairo 7100
•SK4 ELF Toolchain Reference for Ezairo 7100
•Ezairo 7160 SL Datasheet
•Ezairo Sound Designer Software User Manual
BOARD DESIGN & OVERVIEW
Introduction
The Ezairo 7160 SL Hybrid Demonstrator Board is
designed to easily develop high−performance hearing aids
based on the Ezairo 7160 SL hybrid. The miniature,
wireless−enabled hybrid includes an Ezairo 7100 audio
processor, RSL10 Bluetooth®Low Energy radio, 2 Mb of
EEPROM memory (EA2M) and passive components. The
board features many configuration options available via
standard 0.1” header pins, and an on−board J−Link debugger
based on the Atmel ATSAM3U2CA−AU microcontroller.
Using a USB cable, the on−board debugger is used to
interface the RSL10 radio within the Ezairo 7160 SL hybrid
with a PC for debugging, data collection, or monitoring
purposes.
Two versions of the Ezairo 7160 SL demonstrator board
are available. The first board is the E7160SL−001GEVB
which contains an elastomer socket and is designed for
general use. This version of the board is recommended for
development, testing and debug purposes since it enables the
Ezairo 7160 SL module contained in the socket to be easily
swapped out. During development, testing or debug, it may
happen that the Ezairo 7160 SL enters a state where it no
longer operates as expected −for example, due to improper
manipulation of data in the EEPROM. In such a case, the
user can take advantage of being able to easily replace the
hybrid module on this version of the board. For this reason,
onsemi recommends using the E7160SL−001GEVB during
development.
The second board is the E7160SL−002GEVB which is
optimized for RF testing and characterization. The Ezairo
7160 SL hybrid is directly reflowed on the board, which
minimizes the impedance between the onboard matching
network and the Ezairo 7160 SL.
Note: The E7160SL−001GEVB doesn’t contain an Ezairo
7160 SL module, which are sampled separately. The

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E7160SL−002GEVB contains one hybrid module soldered
on the board.
The Ezairo 7160 SL demonstrator board main functional
blocks are shown in Figure 1.
Figure 1. Ezairo 7160 SL Hybrid Demonstrator Board Overview
Ezairo 7160 SL Demonstrator Board Features
•On−board J−Link adaptor for debugging through a USB
connection to the PC
•Alternate on−board SWJ−DP (serial−wire and/or JTAG)
interface for debugging the Arm®Cortex−M3 processor
•Access to all Ezairo 7160 SL peripherals via standard 0.1”
headers
•Onboard 4−bit level translator to translate the DIOs and
debug interface at low voltage to a 3.3 V JTAG debugger
•4 Push Button Switches
•On board 3.3 V Regulator
•3 LEDs
•Test points and GND hooks for easy probing
•Battery Holder
•Current measuring header
•Elastomer socket with hybrid (E7160SL−001GEVB
only)
•Antenna matching and filtering network
CONFIGURATION
Ezairo E7160SL−001GEVB Socketed Board
The socket used on this version of the Ezairo 7160 SL
demonstrator board is designed for easy, tool−free, use. The
following are the steps required to ensure proper function of
the socket.
Aligning the Clamp
1. Ensure that the rubber plunger sits flush with the top
of the grey adapter plate near the end of the range of
motion of the clamp.
2. With minimal pressure, the clamp should lock into
place.
3. Ensure that the rubber plunger lines up with the
cutout in the grey adapter plate.
4. Tighten all nuts fully if adjustment was required.

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Figure 2. Aligning the Clamp with the Adaptor Plate
Inserting the Hybrid
1. Open the clamp fully.
2. Align the pin 1 marker on Ezairo 7160 SL with the
marker on the adapter plate.
3. Insert the hybrid into the socket (ensure the hybrid is
fully inserted and level).
4. Fully close the clamp, ensuring it locks into place.
Note: The clamp should not require more than 1 kg
of force to fully close.
Ezairo 7160SL−002GEVB Reflowed Board
The Ezairo 7160 SL reflowed demonstrator board has the
Ezairo 7160 SL module soldered to PCB and does not
require any additional assembly with respect to the Ezairo
7160 SL module.
Important note:
When VDDO2 is referenced to VDBL (a requirement for
FOTA upgrades and when the Authentication Co−processor
3.0 is used), upgrading the firmware on the RSL10 can fail
on the Ezairo 7160 SL Hybrid Development Board. This is
due to an issue with the board where the RFNRESET pin is
pulled up to VBAT via a resistor (R1) instead of VDDO2. To
work around this problem you must do one of the following:
•Remove R1.
•Install a stronger pullup resistor between RFNRESET
(D5) and VDDO2.
Getting Started
Introduction
This chapter explains how to get started with Ezairo
7160 SL using the Ezairo Sound Designer Software.
Note: IF you are programming the device with your own
firmware, refer to the documentation provided with the
Ezairo 7100 Evaluation and Development Kit (EDK).
Hardware Requirements
•A programming box to connect the hybrid demonstrator
board to a computer. Supported programmers are:
♦Promira Serial Interface from Total Phase, Inc.,
driver version 1.3.6
♦Communication Accelerator Adaptor (CAA), driver
version 1.3
♦HI−PRO, driver version 2.0.0.4
♦DSP Programmer Version 3
♦NOAHlink
♦BlueGiga (Pre Suite only)
Software Requirements
Ezairo Sound Designer Software* (For access, contact
[email protected])
*NDA Required
1. Connect the product to your programmer and to your
computer, as follows:
♦Connect your input source to the negative and center
pins of the 3−pin AI1H header.
♦Connect your recording or listening equipment to
the output, which is labelled OUT0. You might
require an external amplifier to drive headphones
from the output.
♦You can use SW1 and SW2 (found on the
demonstrator board) to adjust the volume. The
maximum input signal range is approximately 2 Vpp
(volts peak−to−peak).
♦Unused audio inputs (AI0H, AI1H, AI2H and
AI3H) can be left floating.
2. Power on the board using the ON−OFF switch.
3. Next, start Sound Designer software by
double−clicking on the SD/sounddesigner.exe
shortcut, which you will find wherever you installed
the Sound Designer software files.
4. Select a workspace, or create a new one.
5. If you do not have a workspace directory available,
click Browse and the software allows you to create
one. If you click Browse and select a pre−existing
directory for your workspace, make sure it is empty.
For this example, check Import Sample Workspace,
and select E7160SL from the drop−down list. Click
OK.
6. Open the console window by clicking the Show
console icon. The console window displays error
and status messages accumulated in this session. We
recommend having the console viewable at all times
while using Sound Designer software, to get
immediate status information.
7. Click on Control Panel and then, for this example,
double−click the Ezairo7160SL.param sample
parameter file to open the demo product library.
8. To connect to the device, go to the SETTINGS
window. Select the correct Programmer, and Port if
applicable. If you also select Verify NVM Writes, the
software burns the settings to the device’s
Non−Volatile Memory and then immediately reads

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back the settings to confirm that the values burned to
the device match what is being read out of the device.
This option requires additional programming time.
Next, click on Detect. A successful detection will
populate the device information in the Device Info
box.
9. Use the back button−the arrow in the top left
corner−to return to the Control Panel.
10. To configure the device for the selected product,
click Programmer > Connect. If the connection
succeeds, the Connection status symbol appears to
the right of the File Name. You can hover over this
symbol to view the programmer name and the
firmware ID of the device. The connected device
must now be configured before you can read, burn or
write parameters in Control Panel. Click
Programmer > Configure to do this.
11. Now you are ready to begin. See Chapter 3,
“Modeler” on page 15 of the Ezairo Sound Designer
Software User Manual for your next steps in the
process of developing a product with Sound
Designer software.
Power Supply
The Ezairo 7160 SL demonstrator board is split into two
distinct subsystems, the Ezairo 7160 module and an Atmel
microcontroller which acts as an on−board J−Link debugger,
to interface and control the RSL10 portion of the Ezairo
7160 SL hybrid without using an external J−Link device.
Therefore, there are also 2 subsystems in the power supply.
One subsystem supplies power to the Ezairo 7160 SL and the
other supplies power to the Atmel microcontroller, with
variations and configurations options available for each.
Ezairo 7160 SL Demonstrator Board Power Supply
Ezairo 7160 SL can be powered from several sources,
including the onboard battery connector, an external power
supply connected via header pins, or from the 6−pin DIN
CAA connector. Shorting two pins together on the
PSU_SEL header chooses which supply source to use, see
Table 1. It is also possible to separately turn off the Ezairo
7160 SL using the on−off switch. This will only turn off
power to that module, not the onboard Atmel
microcontroller. This can, for example, be used to save
battery power if using a battery as the power supply source.
For Ezairo 7160 SL to be powered, the VBAT-I header must
also be shorted. The VBAT-I header optionally provides
a location to measure current consumption of Ezairo 7160
SL.
Table 1. Ezairo 7160 SL POWER SUPPLY OPTIONS
PSU_SEL Power Supply Source
Short pin 1 to 2 6−Pin DIN (CAA Connector)
Short pin 3 to 4 External Bench Supply (EXT_PSU header)
Short pin 5 to 6 Battery (On board battery holder)
Table 2. VBAT SUPPLY
Pin Name Min Nom Max
VBAT 1.13 V 1.25 V 2.0 V
Atmel Microcontroller Power Supply
The Atmel microcontroller core is powered by a 3.3 V
LDO regulator. The regulator is powered by a 5 V rail, which
is supplied either by a USB or JTAG connection. The source
for this 5 V rail is selected using the 5 V_SEL header. See
Table 3. This 3.3 V power source is provided to the
microcontroller’s internal regulator, which outputs 1.8 V
that is used to power the microcontroller. The rest of the
voltage supplies on the microcontroller, for Digital
Input/Outputs and Analog references, etc. are supplied from
the VDD_AT_SEL header. See Table 4 for configuration
options. Table 5 lists the range of voltage outputs possible
for the VDBL output. Do note that the UTMI on the
microcontroller expects 3.0 V −3.6 V. Selecting VDBL as
a source will put the UTMI out of its operating range. See the
Ezairo 7100 Hardware Reference Manual on details for
VDBL configuration.
Table 3. ATMEL MICROCONTROLLER POWER
SUPPLY SELECTION
PSU_SEL Power Supply Source
Short pin 1 to 2 USB power
Short pin 2 to 3 JTAG power
Table 4. ATMEL MICROCONTROLLER DIO, AREF,
UTMI POWER SUPPLY SELECTION
PSU_SEL Power Supply Source
Short pin 1 to 2 3.3 V Onboard regulator
Short pin 2 to 3 Configurable voltage output from E7160
(VDBL)
Table 5. VDBL VOLTAGE CONFIGURABLE OUTPUT
RANGE
Pin Name Min Nom Max
VBAT 1.8 V 2.0 V 2.1 V
Communication
There are a few ways of achieving communication with
the Ezairo 7160 SL demonstrator board:
The micro USB connection (J2) is a J−Link onboard
adaptor that provides a SWJ−DP/UART interface for
debugging of the RSL10.
It is also possible to connect and debug RSL10 via
standard JTAG. The JTAG (J-Link header) connector is
compatible with the J−Link debugging device from Segger.

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The TC2050−IDC connector (J3 header) is used to
program the Arm Cortex−M3 processor inside the Atmel
microcontroller, with J−Link firmware.
Communication and debugging of Ezairo 7100 can be
achieved through the Promira Serial Platform from
TotalPhase through an I2C interface. The Communication
Accelerator Adapter (CAA) is also supported. The serial
interface can be connected to the CAA or Promira through
the 6−pin DIN connector.
For troubleshooting purposes the I2C signals can be
probed on a standard 0.1” header available, labelled I2C, that
allows connection to the SDA (pin 2) and SCL (pin1).
Ezairo 7160 Demonstrator Board
PC
Programming
Interface
On−board
Debugger
Ezairo 7160 SL
RSL10
Ezairo
7100
SEGGER
J−Link
Micro USB
Micro USB
Micro USB
SWJ−DP
UART
6−pin DIN
J−Link Header
J−Link Header
Figure 3. Communication Connections
Table 6. DIN CONNECTOR PIN−OUT
Pin Number Serial Interface Pin Description
1Supply Voltage from the Serial Interface
2System Ground
3SCL (I2C Clock)
4SDA (I2C data)
5VBAT (Sense Voltage)
6No Connect
Table 7. COMMUNICATION CONFIGURATION
Header Configuration Description
VSENSE Connects VBAT to the SENSE pin on the 6−pin
DIN connector, if shorted.
CAA-GND Connects the ground from the Promira/CAA to
the HDB ground, if shorted.
NRESET Can be used to measure the NRESET line on
the Ezairo 7100, or to reset it if shorted.
EXTCLK
Pin to connect an external clock source to drive
the Ezairo 7160 SL module, specifically, the
Ezairo 7100 audio DSP.
RSL10
The RSL10 is a Bluetooth Low Energy radio which is used
within Ezairo 7160 SL relaying information from the Ezairo
7100 DSP to an external device, via Bluetooth Low Energy.
There is an on−board coaxial 50 WSMA connector (J1) that
can be used for attaching a 2.4 GHz Bluetooth antenna. The
demonstrator board also includes an RF filtering circuit on
the antenna input/output.
Level Shifters
The Ezairo 7160 SL demonstrator board includes two
on−board level shifters. The DEBUG header is used to enable
debugging of the RSL10 via the Atmel microprocessor.
Table 8. DEBUG HEADER CONFIGURATION
Pin Configuration Configuration
Short pin 7 to 8 and
short pin 5 to 6
SWJ−DP Debugging enabled
Short pin 3 to 4 and
short pin 1 to 2
Enable serial communication
between RSL10 and Atmel
microcontroller
Short pin 2 to 4 Enable serial loop back on Atmel
microcontroller

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The board also includes a second level shifter accessible
via the LEVEL_SHIFTER header. This is made available to
connect external peripherals to Ezairo 7160 SL via the
RFIO/DIO headers that operate at higher voltages. Pins 1, 3,
5, 7 use the VDDO2 reference supply voltage selected via the
VDDO2_SEL header. This is the supply that the E7160 and
more specifically, the RSL10 DIOs and Ezairo 7100 DIO
bank 2 use. An external power supply voltage can be
connected via the EXT_VDDO2 header. This voltage then
can be used to supply VDDO2, using the VDDO2_SEL
header, negating the need for the level shifter, if the voltage
connected is safe for the Ezairo 7160 SL hybrid. Otherwise,
if VDDO2 and EXT_VDDO2 differ, EXT_VDDO2 will be
used as the reference for pins 2, 4, 6, 8 of the level shifter.
Table 9. VDDO2 HEADER CONFIGURATION
Pins VDDO2 Source
Short pin 1 to 2 VDBL
Short pin 3 to 4 VBAT
Short pin 5 to 6 VEXT (EXT-VDDO2)
Input Stage
The Ezairo 7160 SL demonstrator board provides access
to four analog audio inputs (AI0H, AI1H, AI2H, and
AI3H). The ground reference for the inputs can be adjusted
using the MIC-GND header as follows:
Table 10. INPUT GROUND REFERENCE SELECTION
MIC-GND Input Ground Reference
Short pin 1 to 2 GND_MIC*
Short pin 2 to 3 AGND
*Use GND_MIC reference when input is from a microphone.
For other electrical test equipment use AGND.
There is also an optional AI3−CAP header that can be used
to place a capacitance in between the AI3H input and the AI3
ADC pin.
Output Stage
There are two digital outputs (RCVR0, RCVR1)
available on the board through standard 0.1” header. The
direct digital outputs are available on headers FILTEN0,
FILTEN1, respectively. Separate RC filter networks are
provided to attenuate out−of band noise from the direct
digital outputs when connected to high impedance audio
measurement equipment (OUT0, OUT1). The on−board
RC filters are enabled by the FILTEN0/FILTEN1 headers
as described in Table 12. To enable output, configure the
RCVR−EN and RCVR−BAT headers as described in
Table 11.
Table 11. OUTPUT STAGE ENABLE
CONFIGURATION
Header Configuration Description
RCVR−EN Enable the output drivers of the Ezairo 7160 SL
using VBAT as a source, if shorted.
RCVR−BAT Enable the output drivers of the Ezairo 7160 SL
using the voltage connected to this header as the
source, if shorted. RCVR-EN must be disconnected.
Table 12. ON−BOARD RC FILTER CONFIGURATION
Function FILTEN0/FILTEN1
Disabled open pins 1 to 2
open pins 3 to 4
Enabled short pins 1 to 2
short pins 3 to 4
Note: To connect receivers or loud speakers (without the RC
filter) use headers FILTEN0/FILTEN1 pins 2 and 4.
Digital Input/Output (DIO)
The Ezairo 7160 SL Hybrid Demonstrator Board contains
19 digital I/O (DIO) signals available on three separate
2x4 headers that provide access to a wide variety of
interfaces (GPIO, SPI, PCM, I2C, UART, LSAD, clocks).
See the table below for pin out and reference domains. Pin 1
of each header has the corresponding reference domain.
Pin 8 on each header is ground. Pin 6 of the RFIO header is
ground.
Table 13. DIO/RFIO REFERENCE DOMAINS
DIOs DIO Header Pin Header Reference Domain
20 3 DIO3 VBAT
21 5 DIO3 VBAT
22 7 DIO3 VBAT
23 2 DIO3 VBAT
24 4 DIO3 VBAT
29 6 DIO3 VBAT
4 3 DIO1 VDBL
5 5 DIO1 VDBL
6 7 DIO1 VDBL
7 2 DIO1 VDBL
8 4 DIO1 VDBL
9 6 DIO1 VDBL
RFIO0 3RFIO1 VDDO2
RFIO1 5RFIO1 VDDO2
RFIO2 7RFIO1 VDDO2
RFIO3 2RFIO1 VDDO2
RFIO12 4RFIO1 VDDO2

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The Ezairo 7160 SL demonstrator board also has three
momentary switches that can be used as momentary hard
pull−downs on DIO24 (SW1), DIO29 (SW2) and
RFIO1(SW3).
SW4 can be used to reset the RSL10 radio.
Test Point Headers
Below is a table (Table 14) containing of a list of 0.1”
headers on the board that are provided as measurement test
points. There are also several ground hooks available on the
board as an easy way to provide a reference. They provide
easy access to RFGND, DGND, GND−BAT and GNDOD.
Table 14. OUTPUT STAGE ENABLE
CONFIGURATION
Header Measurement
VREG Output of the voltage regulator in the Ezairo 7160 SL
VBAT Output voltage of the connected battery / chosen
voltage source.
AOUT Analog output test point. Can be configured to output
from a wide range of internal signals. See RSL10
Hardware Reference.
VBDL Charge−pump output. Double VREG.
VDDO2 Current VDDO2 voltage level supplied to the E7160.
Indicator LEDs
There are three indicator LEDs on board. Two are
connected to the Atmel microcontroller. A green LED is
connected to PA29 and a red LED is connected to PA28.
These can be turned on by pulling these pins low on the
Atmel microcontroller. These 2 LEDs are identified with the
label D4. The third LED, D1 is a green led that can be turned
on by pulling RFIO0 from the RSL10, low.
Board Design
The following sections detail the various sub−circuits of
the Ezairo 7160 SL demonstrator board.
The block diagrams in Figure 6 and Figure 7 show the
locations of the various circuit sections.
Figure 4 and Figure 5 provide 3−dimensional illustrations
of the Ezairo 7160 SL demonstrator board.
Figure 4. Three−Dimensional Line Drawing of the Board (Top View)

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Figure 5. Three−Dimensional Line Drawing of the Board (Bottom View)
Figure 6. Circuit Location Block Diagram (Top View)

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Figure 7. Circuit Location Block Diagram (Bottom View)
EZAIRO is registered trademark of Semiconductor Components Industries, LLC dba “onsemi” or its affiliates and/or subsidiaries in the United States and/or
other countries. Bluetooth and the Bluetooth logo are registered trademarks of Bluetooth SIG. Arm, Cortex, and the Arm logo are registered trademarks of
Arm Limited (or its subsidiaries) in the EU and/or elsewhere. Promira is a trademark of Total Phase, Inc.

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APPENDIX A
Schematic
* R1 and L1 are not required in a hearing aid design and are present for engineering and evaluation purposes.
Figure 8. Power Supply and Communication

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Fi
g
ure 9. DUT
* R1and L1 are not required in a hearing aid design and are present for engineering and evaluation purposes.

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Figure 10. Debug Interface

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