Infineon CYW920819M2EVB-01 User manual

User Guide Please read the Important Notice and Warnings at the end of this document 002-36452 Rev. **
www.infineon.com page 1 of 35 2022-10-07
CYW920819M2EVB-01 evaluation kit user guide
About this document
Scope and purpose
CYW20819M2EVB-01 is an evaluation kit for the AIROC™ CYW20819 Bluetooth® & Bluetooth® LE SoC, designed to
support several medical, security, and industrial applications. The system features an Arm® Cortex® - M4 core
with programmable and reconfigurable analog and digital blocks.
It is a combination of a microcontroller with the following:
•Auxiliary ADC with up to 28 analog channels
•Digital peripherals such as PWMs
•Bluetooth® stack, peripheral drivers, security functions built into ROM allowing application to efficiently use
on-chip flash
•5-dBM Tx output power (LE), 11.5-dBM Tx output power (BR), 2.5-dBM Tx output power (EDR)
•Serial communication interfaces such as I2C, UART, PCM, and Quad-SPI
•Over-the-air (OTA) firmware updates
Intended audience
This document is intended for anyone using the CYW20819M2EVB-01 evaluation board.
Document conventions
Table 1 Conventions
Convention
Explanation
Bold
Emphasizes heading levels, column headings, table and figure captions, screen
names, windows, dialog boxes, menus and sub-menus
Italics
Denotes variable(s) and reference(s)
Courier New
Denotes APIs, functions, interrupt handlers, events, data types, error handlers,
file/folder names, directories, command line inputs, code snippets
>
Indicates that a cascading sub-menu opens when you select a menu item

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CYW920819M2EVB-01 evaluation kit user guide
About this document
Abbreviations and definitions
Table 2 Abbreviations
Abbreviation
Definition
API
Application Programming Interface
BR
Basic Rate
BT / BLE
Bluetooth® / Bluetooth® Low Energy
EEPROM
Electrically Erasable Programmable Read-Only Memory
EM
Electro-magnetic
EVB
Evaluation Board
GPIO
General Purpose Input Output
HCI
Host Controller Interface
I2C
Inter-Integrated Circuit
IDE
Integrated Development Environment
JTAG
Joint Test Action Group
LE
Low Energy
LED
Light Emitting Diode
LHL
Lean High Land
LPO
Low Power Oscillator
MEMS
Micro Electro-Mechanical System
NTC
Negative Temperature Coefficient
PCB
Printed Circuit Board
PUART
Peripheral UART
RF
Radio Frequency
SDK
Software Development Kit
SIG
Special Interest Group
SoC
System-On-Chip
SPI
Serial Peripheral Interface
SWD
Serial Wire Debug
UART
Universal Asynchronous Receiver/Transmitter
USB
Universal Serial Bus
WICED
Wireless Internet Connectivity for Embedded Devices
XTAL
Crystal Oscillator

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About this document
Reference documents
This user manual should be read in conjunction with the following documents available at CYW20819 Product
page:
Table 3 Reference documents
Application notes
AN225684 –Getting started with CYW208XX
Describes CYW208XX Bluetooth® SoC and how to build
your first Bluetooth® LE application using the device
with ModusToolbox™.
Code examples
Visit the Infineon GitHub repository for a comprehensive collection of code examples using ModusToolbox™.
Device documentation
CYW20819 device datasheet
CYW20819 feature and peripheral guide
Tool documentation
ModusToolbox™
The Infineon IDE for IoT designers

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Table of contents
Table of contents
About this document....................................................................................................................... 1
Table of contents............................................................................................................................ 4
Safety information ......................................................................................................................... 5
1Introduction .......................................................................................................................... 6
1.1 CYW920819M2EVB-01 kit contents .........................................................................................................6
1.2 CYW920819M2EVB-01 evaluation board details.....................................................................................7
1.3 ModusToolbox™ ......................................................................................................................................8
1.3.1 ModusToolbox™ code examples .......................................................................................................9
1.3.2 Related code examples....................................................................................................................10
1.3.3 ModusToolbox™ help.......................................................................................................................10
1.4 Getting started.......................................................................................................................................10
1.5 IoT resources and technical support....................................................................................................10
2Kit operation ........................................................................................................................11
2.1 Theory of operation...............................................................................................................................11
2.2 Jumpers.................................................................................................................................................15
2.3 Buttons and switches............................................................................................................................17
2.4 Arduino-compatible headers................................................................................................................18
2.5 Other headers........................................................................................................................................19
2.6 USB serial interface chip.......................................................................................................................21
2.7 Kit power supply....................................................................................................................................21
2.8 Test points.............................................................................................................................................21
2.9 Current measurement...........................................................................................................................21
2.10 SWD debugging .....................................................................................................................................21
2.11 Pin configuration...................................................................................................................................22
3Hardware .............................................................................................................................23
3.1 Carrier module.......................................................................................................................................23
3.1.1 CYW20819 .........................................................................................................................................23
3.1.2 Antenna ............................................................................................................................................23
3.1.3 Crystal...............................................................................................................................................23
3.2 Baseboard..............................................................................................................................................23
3.3 Serial communication between CYW20819 and PSoC™ 5 KitProg3 ....................................................24
3.4 Power.....................................................................................................................................................24
3.5 Device reset ...........................................................................................................................................27
3.6 Thermistor.............................................................................................................................................28
3.7 External serial flash...............................................................................................................................29
3.8 Ambient light sensor .............................................................................................................................29
3.9 LEDs .......................................................................................................................................................30
3.10 Push buttons .........................................................................................................................................30
4CYW20819 device I/O mapping................................................................................................31
Revision history.............................................................................................................................34

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Safety information
Safety information
The CYW920819M2EVB-01 evaluation kit is intended for use as a development platform for hardware or
software in a laboratory environment. The board is an open-system design, which does not include a shielded
enclosure. Due to this reason, the board may cause interference to other electrical or electronic devices in close
proximity. In a domestic environment, this product may cause radio interference. In such cases, take adequate
preventive measures. Also, do not use this board near any medical equipment or RF devices.
Attaching additional wiring to this product or modifying the product operation from the factory default may
affect its performance and cause interference with other apparatus in the immediate vicinity. If such
interference is detected, suitable mitigating measures must be taken.
CYW920819M2EVB-01 evaluation board contains electrostatic discharge (ESD)-sensitive
devices. Electrostatic charges readily accumulate on the human body and any equipment
and can discharge without detection. Permanent damage may occur on devices subjected
to high-energy discharges. Proper ESD precautions are recommended to avoid
performance degradation or loss of functionality. Store unused CYW920819M2EVB-01 in
the protective shipping package.
End-of-Life/Product Recycling
This kit has an end-of-life cycle of five years from the year of manufacturing mentioned on
the back of the box. Contact your nearest recycler for discarding the kit.
General safety instructions
ESD protection
ESD can damage boards and associated components. Infineon recommends that you perform procedures only
at an ESD workstation. If an ESD workstation is not available, use appropriate ESD protection by wearing an
antistatic wrist strap attached to the chassis ground (any unpainted metal surface) on the board when handling
parts.
Handling boards
CYW920819M2EVB-01 evaluation boards are sensitive to ESD. Hold the board only by its edges. After removing
the board from its box, place it on a grounded, static-free surface. Use a conductive foam pad if available. Do
not slide the board over any surface. Any physical action on CYW920819M2EVB-01 such as changing wires,
jumper settings, or measuring voltages can cause stress on the CYW920819M2EVB-01 printed circuit board
assembly (PCBA). You must ensure that the PCBA has proper support on the bottom side to avoid stress on the
PCBA when the EVB is in operation.

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Introduction
1Introduction
Thank you for your interest in the CYW920819M2EVB-01 evaluation kit. CYW920819M2EVB-01 enables
customers to evaluate and develop single-chip Bluetooth® and Bluetooth® Low Energy (LE) applications using
CYW20819, dual-mode Bluetooth 5.2 (Bluetooth® LE and BR/EDR) wireless MCU.
CYW920819M2EVB-01 can be used with ModusToolbox™software to develop and debug your CYW20819
project. The evaluation board (EVB) offers footprint-compatibility with Arduino shields. The development
environment is compatible with Windows, macOS, and Linux operating systems. In addition, the kit features an
onboard programmer/debugger (KitProg3). The EVB supports 1.8 V, 3.0 V, and coin-cell operation.
Note: This document applies to ModusToolbox™software 2.4 (or later).
The EVB is available through the Infineon Online Store or through our distributors.
1.1 CYW920819M2EVB-01 kit contents
The EVB includes the following:
•CYW920819M2EVB-01 evaluation board
•USB 2.0 Type-A to micro-B cable
•Quick start guide
Figure 1 CYW920819M2EVB-01 kit contents
Inspect the kit contents. If you find any part missing, contact your nearest Infineon sales office for assistance:
www.infineon.com/support.

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Introduction
1.2 CYW920819M2EVB-01 evaluation board details
Figure 2 shows CYW920819M2EVB-01 evaluation board with the following features:
1. CYW20819 carrier module with onboard antenna
2. Expansion headers compatible with Arduino shields
3. Support for 1.8 V, 3.0 V, and coin-cell operation of the CYW20819M2EVB-01 device
4. Recovery button (Red), Reset button (Blue), and User button (Black)
5. Onboard micro-USB connector (J6) for programming and debug purposes
The USB micro-B connector (J6) supports UART connections and provides +5 V power to the board. See
Jumpers and Buttons and switches for complete information on DIP switches and jumper settings.
Do the following before connecting the board and verifying the driver installation:
1. Verify that all the jumpers are in the default configuration as shown in Table 4 to Table 9, so that Peripheral
UART is selected and can display embedded application trace messages. Figure 2 shows the default jumper
locations.
2. Connect the USB connector (J6) of the evaluation board to the development PC with the provided USB
cable. The USB UART driver should load automatically. If the evaluation board is not detected as a USB
device, reinstall the USB UART driver in ModusToolbox™installation directory.
For Windows and macOS: <install>\tools_2.4\driver_media\dpinst.
For Linux: <install>\tools_2.4\driver_media\install_driver\dpinst.
Figure 2 CYW920819M2EVB-01 evaluation board

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Introduction
Figure 3 highlights the LEDs provided on CYW920819M2EVB-01:
•D3 (Green) indicates that VDD3P0 (3.0 V) power is ON
•D15 (White) indicates HCI UART activity
•D16 (Purple) indicates peripheral UART activity
•D5 (Yellow) indicates KitProg3 status
•D1 (Yellow) and D2 (Red) are generic user LEDs controlled by GPIOs. A label on the back of the kit provides
the pin mapping.
Figure 3 CYW920819M2EVB-01 evaluation board LEDs
1.3 ModusToolbox™
ModusToolbox™is a free software development ecosystem that includes the Eclipse IDE for ModusToolbox™,
Bluetooth® SDK, and the PSoC™6 SDK to develop applications for Infineon IoT products. Eclipse IDE for
ModusToolbox™is a multi-platform, integrated development environment (IDE) used to create new
applications, update application code, change middleware settings, and program/debug applications.
Using ModusToolbox™, you can enable and configure device resources and middleware libraries, write C source
code, and program and debug the device. The IDE provides hooks for launching various tools provided by the
SDK, called Bluetooth® SDK (BT SDK).
The BT SDK provides the central core of the ModusToolbox™software for creating Bluetooth® applications. It
contains configuration tools, drivers, libraries, middleware, make files, as well as various utilities, and scripts.
You may use these tools in any development environment you prefer.
For detailed information on ModusToolbox™installation and usage, see the ModusToolbox™ user guide.

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Introduction
1.3.1 ModusToolbox™ code examples
ModusToolbox™includes many code examples. Many of these code examples are compatible with this kit. You
can either browse the collection of starter applications during application set up through File > New >
ModusToolbox™Application or browse the collection of code examples on Infineon’ GitHub repository. See
Figure 4 and Figure 5 for details.
Figure 4 Code examples in ModusToolbox™
Figure 5 Searching for online code examples in ModusToolbox™

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Introduction
1.3.2 Related code examples
You can access the kit code examples from the GitHub repository. The CYW920819M2EVB-01 evaluation board
is pre-programmed with the Find Me Profile (CE226123 –BLE Find Me with CYW20819) code example out-of-the-
box.
This code example is available in ModusToolbox™as shown in Figure 4.For the most recent version of the code
example, check the GitHub repository. You can find the CE226123 code example in
github.com/Infineon/mtb-example-btsdk-ble-findme.
For more details on the functionality, design and implementation of the code example, see the code example
document present in the same folder as that of the code example. To import the most recent version of the
GitHub code examples into ModusToolbox™, see the ModusToolbox™user guide document (Help >
ModusToolbox™Documentation > User guide).
1.3.3 ModusToolbox™ help
Launch ModusToolbox™and navigate to the following items:
•Quick Start Guide: Choose Help > Eclipse IDE for ModusToolbox™Documentation > Quick Start Guide.
This guide gives you the basics for using ModusToolbox™.
•ModusToolbox™General Documentation: Choose Help > ModusToolbox™General Documentation >
ModusToolbox™Documentation Index. This page provides link to various ModusToolbox™documents.
•ModusToolbox™User Guide: Choose Help > Eclipse IDE for ModusToolbox™Documentation > User
Guide. This is a comprehensive guide for creating, building, and programming ModusToolbox™
applications.
1.4 Getting started
This user guide will help you find details of the CYW920819M2EVB-01 Evaluation Kit:
•The Kit operation chapter describes the operation of the kit and how to use its various features.
•The Hardware chapter describes the design details of the CYW920819M2EVB-01 hardware blocks.
1.5 IoT resources and technical support
Infineon provides a wealth of product documentation at https://www.infineon.com/products/wireless-
connectivity to help you to select the right IoT device for your design. Also, a professional community at
community.infineon.com supplies developers the latest software and tools to solve common evaluation and
integration problems while interacting directly with both Infineon engineers and experienced peers.

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Kit operation
2Kit operation
This section provides detailed instructions to set up the Infineon CYW920819M2EVB-01 evaluation board to use
with Infineon ModusToolbox™for Bluetooth® Classic (aka BR - Basic Rate and EDR –Enhanced Data Rate) and
Low Energy (LE) applications.
This chapter introduces you to CYW920819M2EVB-01 and the features that will be used as part of the kit
operation. This chapter also discusses features such as the Bluetooth® connectivity and
programming/debugging as well as the USB-UART bridge device that can be used to communicate with the
CYW20819-A1 device on this EVB.
2.1 Theory of operation
CYW920819M2EVB-01 is built around the CYW20819 device. Figure 6 shows the block diagram of the CYW20819-
A1 device. See the device datasheet for details on device features.
Figure 6 Block diagram of CYW20819

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Kit operation
Figure 7 illustrates the block diagram of CYW920819M2EVB-01. This board contains a CYW20819 Bluetooth®
SoC and a USB-Serial interface/programmer. The kit features Arduino form-factor-compatible headers, which
enable Arduino shields to be plugged in, extending the EVB’s capabilities. It also features one user switch, one
reset switch, one recovery switch, two user LEDs, a thermistor, an ambient light sensor, and multiple power
supply options.
Digital MIC
Buttons
1. Recovery
2. Reset
3. User
User LED
Carrier VBAT, VDDIO and
VDDUSB Monitoring
Analog MIC Ambient
Light Sensor Thermistor
Infineon
Bluetooth®/
Bluetooth® LE chip
32.768-kHz XTAL
Band Pass
Filter
Antenna
U.FL
Connector
24-MHz
XTAL
M.2 I/O
Interface
Voltage Detector
AIROC Headers Arduino Headers
(VDDIO/VDD3P0)
10-pin
Debugger
(VDDIO)
PSoCLP
BT_UART PUART
USB Micro - B
Coin
Cell
3.0 V
Reg
1.8 V
Reg
USB
Power
External Headers
No Load
Infineon Device
Electric Connection
M.2 Bluetooth®/
BLuetooth® LE
Radio Card
Figure 7 Block diagram of CYW920819M2EVB-01
Figure 8 and Figure 9 show the markup of the CYW920819M2EVB-01 evaluation board. See the list below for a
description of the numbered items.

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Kit operation
Figure 8 CYW920819M2EVB-01 evaluation board (Top view)
Figure 9 CYW920819M2EVB-01 evaluation board (Bottom view)
1. Peripheral enable (J19): The jumper allows the user to connect and disconnect the VDDIO supply to on-
board peripheral devices like motion sensor, thermistor, analog mic, and real-time clock by disabling VDDP.
2. VIO_BASE select jumper (J7): This jumper is used to select the VIO_BASE power source. Possible selections
are 3.0 V, 1.8 V, or VCOIN, which is the coin-cell power supply on the bottom side of the board.
3. Power indicator LED (D3): This LED is used to indicate the status of power supplied to board.
4. VBAT select jumper (J8): This jumper is used to select the VBAT (core power supply) power source. The
possible selections are 3.0 V, 1.8 V, or VCOIN which is the coin-cell power supply on the bottom side of the
board.

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Kit operation
5. USB connector (J6): J6 is a micro-B USB female connector for connecting the kit to PC using the provided
USB cable. It is used for programming and USB-UART communication.
6. VPA_BT select jumper (J16): This jumper is used to select the VPA_BT (power amplifier supply) power
source. This select header applies to evaluation boards that has an internal power amplifier and it is not
connected to CYW20819 in CYW920819M2EVB-01 evaluation board.
7. KitProg3 (PSoC™ 5LP) programmer and debugger (CY8C5868LTI-LP039, U12): The PSoC™5LP
(CY8C5868LTI-LP039) serving as KitProg3, is a multi-functional system, which includes a Serial Wire Debug
(SWD) programmer, debugger, USB-I2C bridge and USB-UART bridge. For more details, see the KitProg3
user guide.
8. KitProg3 programming mode selection button (SW5): This switch can be used to switch between various
modes of operation of KitProg3 (CMSIS-DAP BULK, CMSIS-DAP HID or DAPLink modes). This switch is not
used for CYW920819M2EVB-01 because the board supports only one mode.
9. HCI-UART indication LED (D15): This White LED indicates the status of HCI-UART.
10.PUART indication LED (D16): This Purple LED indicates the status of PUART.
11.KitProg3 status indication LED (D5): This Yellow LED indicates the status of KitProg3.This is not useful for
CYW920819M2EVB-01 because the board supports only one mode.
12.SWD/GPIO switch (SW8): This switch allows you to route the functionality of GPIO/SWD lines to either J4
Arduino-compatible header or the J13 debug header.
13.Debug header (J13): J13 is a 10-pin interface header that can be used to connect an external debugger via
SWD.
Note: J13 should only be used to connect a debugger. If something else is connected to J13 to
communicate with KitProg3, a voltage mismatch can occur.
14.Recovery button (SW1): This button is used to put the device in recovery mode. To put the device in
recovery mode, press and hold the recovery button, press and release the reset button, and then release the
recovery button. You may need to put the device in recovery mode when the application download fails.
15.Arduino-compatible header (J1): The Arduino-compatible I/O header brings out pins from CYW20819 to
interface with Arduino shields.
16.Reset button (SW2): This button can be used to reset the device.
17.Arduino-compatible header (J2): The Arduino-compatible I/O header brings out pins from CYW20819 to
interface with Arduino shields.
18.User button (SW3): This button can be used to provide an input to the CYW20819 device. Note that the
button connects the CYW20819 pin to ground when pressed; therefore, the CYW20819 pin must be
configured as a digital input with resistive pull-up for detecting the button press.
19.User LEDs (D1 and D2): These onboard LEDs can be controlled by the CYW20819 device. The LEDs are active
LOW; therefore, these pins must be driven to ground to turn ON the LEDs.
20.LED enable switch (SW4): This switch is used to connect/disconnect the user-controlled LEDs from the
CYW20819 device.
21.Carrier module (U1): The carrier module has the CYW20819 SoC on it. A Bluetooth® antenna is etched on
the carrier module PCB. The carrier module is interface with the baseboard through M.2 interface.
22.CYW20819 (U1. U1): The Bluetooth® (BR/EDR- Basic Rate and Enhanced Data Rate) and Bluetooth® Low
Energy 5 qualified system-on-chip from Infineon is the heart of this evaluation kit.
23.PCB antenna (A1): The PCB antenna is the EM wave radiating part of the evaluation board, which is fed
from the BT_RFIO pad of CYW20819 followed by a band-pass filter and an antenna matching circuit.
24.External antenna connector (U1.J3): The external antenna connector is an RF connector fed from the
BT_RFIO pad of the CYW20819 device followed by a band pass filter. See Hardware design guidelines on
the product page for more details.

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Kit operation
25.Thermistor (TH2): The on-board thermistor is an NTC analog thermistor that can be used to measure
temperature.
26.Thermistor enable jumper (J18): This jumper can be used to connect or disconnect the onboard
thermistor from the CYW20819 device.
27.Arduino-compatible header (J4): The Arduino-compatible I/O header brings out pins from CYW20819 to
interface with Arduino shields.
28.WICED header (J12): This header brings out some pins of the CYW20819 device that are not connected to
the Arduino compatible headers. These pins can be used for testing or for custom applications.
29.Arduino-compatible header (J3): The Arduino-compatible I/O header brings out pins from CYW20819 to
interface with Arduino shields.
30.WICED header (J11): This header brings out some pins of the CYW20819 device that are not connected to
the Arduino compatible headers. These pins can be used for testing or for custom applications.
31.64-Mb serial flash (U11): This is the 64-Mbit SPI flash used for application purpose.
32.PUART voltage level translator (U8): This voltage level translator IC allows the interoperability of devices
(CYW20819 device and USB/Serial IC) with different high –level and low –level voltages for input and output
operations.
33.HCI-UART voltage level translator (U7): This voltage level translator IC allows interoperability of devices
(CYW20819 device and USB/Serial IC) with different high-level and low-level voltages for input and output
operations.
34.VDDIO current measurement jumper (J17): This jumper is used to power the carrier module. To measure
the current consumed by the carrier module, remove this jumper and connect an ammeter to the two pins.
35.Ambient light sensor (U14): This is an I2C-based ambient light sensor.
36.Analog mic (MIC1): It is not supported by CYW20819.
37.Digital mic (U13): The digital microphone ASIC contains an extremely low –noise preamplifier and a high-
performance sigma-delta ADC.
38.Debug/programming mode select switch (SW15): This switch allows you to route the functionality of
KitProg3/GPIO lines to either the PSoC™5LP based KitProg3 or J4 Arduino-compatible header.
39.Coin cell holder (BT1): This is a coin cell battery holder located on the bottom side of the development kit.
If the evaluation board needs to use the power supplied from the coin cell, then the VDDIO, VBATT and
VPA_BT select headers must be set to VCOIN.
40.P-UART flow control switch (SW17): This switch allows you to enable and disable the PUART flow control
functionality.
2.2 Jumpers
Table 4 to Table 9 list the jumper settings on the CYW920819M2EVB-01 board.
Table 4 Jumper J7 pin configurations
Jumper J7
(VIO_BASE
selection)
Default state
Connection on
CYW20819
Description
2 and 3
Shorted
VDDO1, VDDO2
Short these pins to supply 3.0 V to VIO_BASE of the
CYW20819 device, as well as all peripherals and
sensors.
3 and 4
Open
Short these pins to supply 1.8 V to VIO_BASE of the
CYW20819 device, as well as all peripherals and
sensors.

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Kit operation
Jumper J7
(VIO_BASE
selection)
Default state
Connection on
CYW20819
Description
1 and 3
Open
Short these pins to supply VIO_BASE of the
CYW20819 device, as well as all peripherals and
sensors from the coin cell supply (VCOIN).
Table 5 Jumper J8 pin configurations
Jumper J8 (VBAT
selection)
Default state
Connection on
CYW20819
Description
2 and 3
Shorted
SR_PVDD,
PMU_AVDD
Short these pins to supply 3.0 V to VBAT of the
CYW20819 device. Also, use this jumper to measure
the current consumption of VBATT when using 3.0-
V supply.
3 and 4
Open
Short these pins to supply 1.8 V to VBATT of the
CYW20819 device. Also, use this jumper to measure
the current consumption of VBATT when using 1.8-
V supply.
1 and 3
Open
Short these pins to use the coin cell supply VBATT
of the CYW20819 device. Also, use this jumper to
measure the current consumption of VBATT when
using the coin cell supply (VCOIN).
Table 6 Jumper J18 pin configuration
Jumper J18
(Thermistor
connect/
disconnect)
Default state
Connection on
CYW20819
Description
1 and 2
Shorted
P8
Short this jumper to connect the on-board
thermistor to CYW20819.
Table 7 Jumper J17 pin configuration
Jumper J17
(VDDIO current
measurement)
Default state
Connection on
CYW20819
Description
1 and 2
Shorted
VDDIO1, VDDIO2
Short this jumper to supply power to the I/O
domain (VDDIO) of CYW20819. Also, use this jumper
to measure the current consumption of the I/O
domain.
Table 8 Jumper J19 pin configuration
Jumper J19
(Peripheral
enable)
Default state
Connection on
CYW20819
Description
1 and 2
Shorted
NA
Allows power to on-board peripherals such as
ambient light sensor.

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CYW920819M2EVB-01 evaluation kit user guide
Kit operation
Table 9 Jumper J16 pin configurations
Jumper J16
(VPA_BT current
measurement)
Default state
Connection on
CYW20819 device
2 and 3
Shorted
NC_0
(PALDO_VDDIN)
This select header applies to evaluation boards
that has an internal power amplifier and it is not
connected to CYW20819 in the CYW920819M2EVB-
01 evaluation board.
3 and 4
Open
This select header applies to evaluation boards
that has an internal power amplifier and it is not
connected to CYW20819 in the CYW920819M2EVB-
01 evaluation board.
1 and 3
Open
This select header applies to evaluation boards
that has an internal power amplifier and it is not
connected to CYW20819 in the CYW920819M2EVB-
01 evaluation board.
Note: VDDIO must be greater or equal to VBATT. CYW20819 uses an on-chip low-voltage detector to shut
down the chip when supply voltage (VBATT) drops below the operating range. The shutdown
voltage (VSHUT) lies between a minimum of 1.5 V and a maximum of 1.7 V. See the datasheet for
more details.
2.3 Buttons and switches
Table 10 Button functionality
Buttons
Pressed state
Connection on
CYW20819
Description
SW1
GND
RECOVER
Recovery button* (Red)
SW2
GND
RST_N
Active LOW Reset button (Blue)
SW3
GND
P0
User application button (Black)
Note: *See the Recovery button (SW1): under Theory of operation.
The switch SW4 enables or disables the two onboard user LEDs. By default, both LED1 and LED2 are enabled.
Table 11 SW4 slide switches configuration
SW4
Default state
Connection on
CYW20819
Description
POS 1
ON
NC
Enables LED1
ON
NC
Enables LED2
POS 2
OFF
NC
Enables DMIC_CLK
OFF
NC
Enables DMIC_DATA
SW8 is a slide switch. Pos 1 allows RSVD_4 and RSVD_5 to be used for SWD functionality for the debugger
interface. Pos 2 allows P2 and P3 to be used for SWD functionality for the debugger interface and when using P2
and P3 as GPIOs, keep SW8 in the Pos2 position.

User Guide 18 of 35 002-36452 Rev. **
2022-10-07
CYW920819M2EVB-01 evaluation kit user guide
Kit operation
Table 12 SW8 slide switches configuration
Slide SW8
Default state
Connection on
CYW20819
Description
POS 1
OFF
RSVD_4
Connects RSVD_4 to the Arduino-compatible header
pin RSVD_4 if the slide switch is in the OFF state.
Connects RSVD_4 to the debug header if the slide
switch is in the ON state.
OFF
RSVD_5
Connects RSVD_5 to the Arduino-compatible header
RSVD_5 if the slide switch is in the OFF state.
Connects RSVD_5 to the debug header if the switch
is in the ON state.
POS 2
ON
P2
Connects P2 to the Arduino-compatible header pin
ARD_D4_SWDCLK if the slide switch is in the OFF
state. Connects P2 to the debug header if the slide
switch is in the ON state.
ON
P3
Connects P3 to the Arduino-compatible header pin
ARD_D45SWDIO if the slide switch is in the OFF
state. Connects P3 to the debug header if the slide
switch is in the ON state.
2.4 Arduino-compatible headers
J3, J4, J11, and J12 are the Arduino-compatible headers.
Table 13 Header J3 pin configuration
Header J3
Arduino pin
Connection on
CYW20819
WICED Enum
name
Description
1
SCL
P26
WICED_P26
I2C SCL
2
SDA
P27
WICED_P27
I2C SDA
3
AREF
NC
-
NC
4
GND
GND
-
Ground
5
D13
P9
WICED_P09
GPIO
6
D12
P17
WICED_P17
GPIO
7
D11
P6
WICED_P06
GPIO
8
D10
P15
WICED_P15
GPIO
9
D9
NC
-
NC
10
D8
P14
WICED_P14
GPIO
Table 14 Header J4 pin configuration
Header J4
Arduino pin
Connection on
CYW20819
WICED Enum
name
Description
1
D7
P5
WICED_P05
GPIO
2
D6
P4
WICED_P04
GPIO
3
D5
P3
WICED_P03
GPIO
4
D4
P2
WICED_P02
GPIO
5
D3
P1
WICED_P01
GPIO
6
D2
P0
WICED_P00
User button

User Guide 19 of 35 002-36452 Rev. **
2022-10-07
CYW920819M2EVB-01 evaluation kit user guide
Kit operation
Header J4
Arduino pin
Connection on
CYW20819
WICED Enum
name
Description
7
D1
P32
WICED_P32
PUART RX
8
D0
P37
WICED_P37
PUART TX
Table 15 Header J1 pin configuration
Header J1
Arduino pin
Connection on CYW20819
Description
1
NC
NC
NC
2
VIO_BASE
VDDIO
I/O reference pin used by shields to determine
the I/O voltage. Connected to VDDIO on this
board. Therefore, IOREF follows 1.8 V or 3.0 V,
or VCOIN of VDDIO.
3
RST
ARD_RST/P1
Arduino Reset (R72 install position A) (See
Device reset) / P1 (R72 install position B).
4
3V0
VDD3P0
3.0-V supply output to the Arduino Shield.
5
5V
VDD5V
5-V supply output to the Arduino Shield.
6
GND
GND
Ground
7
GND
GND
Ground
8
NC
NC
NC
Table 16 Header J2 pin configuration
Header J2
Arduino pin
Connection on
CYW20819
WICED Enum
name
Description
1
A0
P8
WICED_P08
GPIO/Thermistor
2
A1
NC
-
-
3
A2
P10
WICED_P10
GPIO/PUART CTS
4
A3
NC
-
-
5
A4
P12
WICED_P12
GPIO
6
A5
P13
WICED_P13
GPIO
Note: When accessing Arduino pins, remove the jumpers that may interfere with the Arduino pins such as
PUART jumpers and thermistor jumper.
2.5 Other headers
J11 and J12 are test headers which bring out certain pins of CYW20819 for testing.
Table 17 Header J11 pin description
Header J11
Connection to
header pin
Connection on
CYW20819
WICED Enum
name
Description
1
BT_UART_CTS_L
BT_UART_CTS
WICED_P27
BT_UART_CTS
2
LED1_L
P29
WICED_P26
LED1 connection.
3
LED2_L
P28
–
LED2 connection.
4
RSVD_10
P9
–
SF_SCLK
5
RSVD_11
DEV_WAKE
–
Signal to wake up the device

User Guide 20 of 35 002-36452 Rev. **
2022-10-07
CYW920819M2EVB-01 evaluation kit user guide
Kit operation
Header J11
Connection to
header pin
Connection on
CYW20819
WICED Enum
name
Description
6
RSVD_12
HOST_WAKE
–
Signal to wake up the host
7
COEX1
NC
–
No connect.
8
COEX2
NC
–
No connect.
9
COEX3
NC
–
No connect.
10
GND
GND
–
Ground.
Table 18 Header J12 pin description
Header J12
Connection to header pin
Connection on CYW20819
Description
1
RSVD_1_USER_BTN
P0
SW3 user button connection.
2
RSVD_2
NC
No connect.
3
RSVD_3
NC
No connect.
4
RSVD_4
NC
No connect.
5
RSVD_5
NC
No connect.
6
RSVD_6
P6
SF_MOSI.
7
RSVD_7
P17
SF_MISO.
8
RSVD_8
NC
Ambient light sensor INT.
9
RSVD_9
P11 (WICED_P11)
SPI (Slave select) external flash
memory.
10
VIO_BASE
NC
J13 is a 10-pin debugger header to debug CYW920819M2EVB-01 using SWD.
Table 19 Header J13 pin description
Header J13
Connection to
header pin
Connection on
CYW20819
WICED Enum
name
Description
1
VDDIO
VDDIO
VDDIO reference.
2
D5/SWDIO
P3
WICED_P03
Serial wire debug input output. SW9
switch 2 must be in the OFF position
for this connection to be made.
3
GND
GND
Ground.
4
D4/SWDCK
P2
WICED_P02
Serial wire debug clock.
SW9 switch 1 must be in the OFF
position for this connection to be
made.
5
GND
GND
–
Ground.
6
NC
NC
–
No connect.
7
GND
GND
–
Ground.
8
NC
NC
–
No connect.
9
GND
GND
–
Ground.
10
SWD_RST
BT_RST_N
–
CYW20819 device reset.
Note: J13 should be used only to connect a debugger. If not, a voltage mismatch can occur.