Infineon CYW943907AEVAL1F User manual

User Guide Please read the Important Notice and Warnings at the end of this document 002-34339 Rev. *A
www.infineon.com page 1 of 25 2022-10-10
CYW943907AEVAL1F evaluation kit guide
About this document
Scope and purpose
This document serves as a guide for using the CYW943907AEVAL1F evaluation kit. The document explains
software installation, kit operation, hardware details of the board, and provides a list of code examples.
Intended audience
This guide is intended for all technical specialists who want to use the CYW943907AEVAL1F kit using
ModusToolbox™ software (2.4 or later) and are familiar with Wi-Fi connectivity. This board is intended to be
used in laboratory conditions.
Reference documents
This user guide should be read in conjunction with the following documents:
•ModusToolbox™ software user guide
•ModusToolbox™ software installation guide
•AIROC™ CYW43907 data sheet

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Table of contents
Table of contents
About this document....................................................................................................................... 1
Table of contents............................................................................................................................ 2
Safety and regulatory compliance information .................................................................................. 3
General safety instructions..........................................................................................................................................3
ESD protection ............................................................................................................................................................3
Handling boards ..........................................................................................................................................................3
1Introduction .......................................................................................................................... 4
1.1 Kit contents..............................................................................................................................................4
1.2 Getting started.........................................................................................................................................5
1.3 Board details............................................................................................................................................6
1.4 Software development and system overview........................................................................................7
1.5 Additionallearningresources .................................................................................................................7
1.6 IoT resources andtechnicalsupport.......................................................................................................7
1.7 Documentation conventions ..................................................................................................................7
1.8 Abbreviations and definitions.................................................................................................................7
2Software installation.............................................................................................................. 9
2.1 Install software........................................................................................................................................9
3Kit operation ........................................................................................................................10
3.1 Theory of operation ...............................................................................................................................10
3.2 Onboard programmer/debugger and serial interface chip.................................................................11
3.2.1 Kit connection ..................................................................................................................................11
3.2.2 Building, programming, and debugging.........................................................................................11
4Hardware .............................................................................................................................16
4.1 User switches.........................................................................................................................................16
4.1.1 LEDs ..................................................................................................................................................16
4.1.2 Reset control ....................................................................................................................................17
4.2 Connectors ............................................................................................................................................18
4.2.1 Headers compatible with Arduino...................................................................................................19
4.3 UART port configuration .......................................................................................................................20
4.4 PWM .......................................................................................................................................................21
5Code examples......................................................................................................................22
Revision history.............................................................................................................................24

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Safety and regulatory compliance information
Safety and regulatory compliance information
This kit is intended for development purposes only. The board is an open-system design, which does not
include a shielded enclosure. Due to this reason, the board may interfere with 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.
Safety evaluationfor this kit is done in factory default settings using default accessoriesshipped with the kit. All
evaluations for safety are carried out using a 5-V (USB 2.0, @ 500 mA) supply. 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 should be taken.
This kit is not a finished product and when assembled may not be resold or otherwise marketed unless all
required authorizations are first obtained. Contact [email protected]for details.
These kits contain electrostatic discharge (ESD) sensitive devices.
Electrostatic charges readily accumulate on the human body and any
equipment, which can cause a 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 kits in the protective shipping package.
End-of-Life/Product Recycling
The end-of-life cycle for this kit is five years from the date of manufacture
mentioned on the back of the box. Contact your nearest recycler to discard
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 unavailable, use appropriate ESD protection by wearing an
anti-static wrist strap attached to the chassis ground (any unpainted metal surface) on your board when handling
parts.
Handling boards
CYW943907AEVAL1F 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 the board such as changing wires, jumper settings, or measuring
voltages can cause stress on the 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 EVK is in operation.

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Introduction
1Introduction
Thank you for your interest in the CYW943907AEVAL1F evaluation kit (EVK). This EVK enables you to evaluate
and develop single-chip Wi-Fi applications using AIROC™ CYW43907 devices.
TheEVKusesModusToolbox™ software (2.4 or later) to develop and debug your CYW43907 project. This EVK offers
footprint-compatibility with Arduino shields. In addition, the kit features an RJ45 Ethernet connector, a Micro-SD-
card slot, onboard programmer/debugger, and serial bridge chip. This EVK supports only 3.3 V as the operating
voltage.
Older revisions of the same kit were named “BCM943907AEVAL1F_2”and “BCM943907AEVAL1F”. “CYW43907”
and “BCM43907”refer to the same device.
ModusToolbox™ software (2.4or later) is compatible with Windows, macOS, and Linux operating systems. Both
ModusToolbox™software and WICED IDE can be used for the CYW943907AEVAL1F evaluation kit (EVK) but the
default IDE is ModusToolbox™software.
For more information on WICED IDE, see https://www.cypress.com/file/370526/download.
Note: This document applies to ModusToolbox™ software (2.4 orlater).
The CYW943907AEVAL1F EVK is available through the Cypress Online Store or through distributors.
1.1 Kit contents
The CYW943907AEVAL1F EVK includes the following:
•One CYW943907AEVAL1F evaluation board with assembled headers compatible with Arduino
•One USB 2.0 Type-A to Micro-B cable
Hardware not included with the kit
The CYW943907AEVAL1F EVK does not come with all the hardware needed to perform the demonstrations
documented in this guide.
The following hardware is not included with this kit and must be supplied separately:
•RJ45 Ethernet cable
•SD card
•External power supply
•Dual external antenna

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Introduction
Figure 1 Kit contents
Inspect the contents of the kit; if you find any part missing, go to www.cypress.com/support.
1.2 Getting started
This guide will help you to get acquainted with this evaluation kit:
•The Software installation chapter describes the installation of the kit software. This includes extracting the
required files for ModusToolbox™ software (2.4 or later).
•The Kit operation chapter describes the major sections of the kit such as the onboard
programmer/debugger chip, reset control, headers, programming and debugging of the kit.
•The Hardware chapter describes the EVK hardware and its different blocks.
•The Code examples chapter provides a list of code examples that will help you understand how to get
started with basic peripheral and WLAN examples.

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Introduction
1.3 Board details
The CYW943907AEVAL1F board consists of the blocks shown in Figure 2.
1. Reset switch (SW2)
2. RJ45 connector (J14)
3. Micro USB (programming and debugging) (J5)
4. (Optional) 5-12 V power input (J8)
5. 44-pin expansion header with I2C, SDIO, UART, SPI, PWM lines and I/Os (J6)
6. Header compatible with Arduino (J13)
7. User switch 1 (SW3)
8. User switch 2 (SW1)
9. Header compatible with Arduino (J9)
10. PCB antenna - Main (ANT1)
11. Connector for external antenna 1 (J1)
12. AIROC™ CYW43907 Type 1GC module from Murata (U14)
13. PCB antenna - Diversity (ANT0)
14. Connector for external antenna 0 (J2)
15. Onboard/external JTAG switch (SW4)
16. External JTAG header (J3)
17. Header compatible with Arduino (J10)
18. Header compatible with Arduino (J12)
19. Ethernet PHY chip (U12) –BCM5241
Figure 2 CYW943907AEVAL1F evaluation board –top view

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Introduction
1.4 Software development and system overview
See the ModusToolbox™ software user guide.
1.5 Additional learning resources
Visit CYW943907AEVAL1F EVK and AIROC™ CYW43907 web pages for additional learning resources including
datasheets and application notes.
1.6 IoT resources and technical support
Cypress provides a wealth of data at www.cypress.com/internet-things-iot to help you select the right IoT
device for your design, and quickly and effectively integrate the device into your design. Cypress provides
customer access to a wide range of information, including technical documentation, schematic diagrams,
product bill of materials, PCB layout information, and software updates.
For assistance, gotowww.cypress.com/support. Visit community.infineon.com to ask your questions in
Infineon developer community.
1.7 Documentation conventions
Table 1 Document conventions
1.8 Abbreviations and definitions
Table 2 Abbreviations
Abbreviation
Definition
AWS
Amazon Web Services
CPU
central processing unit
DC
direct current
ESD
electrostatic discharge
EVK
evaluation kit
GPIO
general-purpose input/output
IC
integrated circuit
IDE
integrated development environment
Convention
Usage
Courier New
Displays user-entered text and source code
Italics
Displays file names and reference documentation:
Read about the sourcefile.hex file in the PSoC™Creator user guide.
File > Open
Represents menu paths: File > Open > New Project
Bold
Displays commands, menu paths, and icon names in procedures:
Click the File icon and then click Open.
Times New Roman
Displays an equation:
2 + 2 = 4
Text in gray boxes
Describes Cautions or unique functionality of the product.

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Introduction
Abbreviation
Definition
IoT
Internet of Things
I2C
Inter-integrated Circuit
I2S
Inter-IC Sound
JTAG
Joint Test Action Group
LED
light-emitting diode
LPO
low-power oscillator
MQTT
message queue telemetry transport
PC
personal computer
PSoC™
programmable system-on-chip
SDIO
secure digital input output
SDK
software development kit
SPI
serial peripheral interface
UART
universal asynchronous receiver transmitter
USB
Universal Serial Bus
WLAN
wireless local area network

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Software installation
2Software installation
2.1 Install software
Go to the ModusToolbox™ software website (www.cypress.com/modustoolbox) and download the appropriate
software for your platform.
See ModusToolbox™ software installation guide.

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Kit operation
3Kit operation
3.1 Theory of operation
Figure 3 illustrates the block diagram of the CYW943907AEVAL1F evaluation board. This board contains a Type
1GC wireless module as a system-in-a-package (SiP) based on the AIROC™ CYW43907 device, which is an embedded
network controller solution from Murata. This board also contains a USB-Serial interface, JTAG programmer,
and a debugger.
This board features headersthatareform-factor-compatible with Arduino, which enable Arduino shields to be
plugged on top, extending its capabilities. This board also features two user switches, two user LEDs, an RJ45
connector for Ethernet, and a reset switch for the wireless module.
Figure 3 Block diagram

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Kit operation
3.2 Onboard programmer/debugger and serial interface chip
An FT-2232-HQ chip is used for onboard programming, debugging, and USB-serial functionality. It connects to
the PC over a USB interface and connects to the AIROC™ CYW43907-based SiP module over JTAG and UART
pins. Alternatively, you can use the external JTAG connector (J3) along with switch SW4 (in all closed positions)
in order to use JTAG from connectors such as Olimex.
3.2.1 Kit connection
The EVK can be powered by an external power supply or though USB.
When using an external power supply, you should use a 5 V–12 V, 2-A power supply with a 2.1-mm DC jack
(center pin positive). When powered from USB, there are two logical USB devices: a USB-JTAG device and a
USB-UART device. Drivers for the EVK are automatically installed during the ModusToolbox™SDK installation
process.
3.2.2 Building, programming, and debugging
1. Start ModusToolbox™software.
When launching the Eclipse IDE, it provides an option to select the workspace location on your machine.
This location is used by the IDE for creating and storing the files as part of application creation for a
particular platform. The default workspace location is a folder called “mtw” in your home directory. You
may add additional folders under the “mtw” folder or to choose any other location for each workspace.
2. Click the New Application link in the Quick Panel (or, use File > New > ModusToolbox™ Application). This
launches the Project Creator tool.
Figure 4 Create new application
Figure 5 Create new application (alternative method)

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Kit operation
3. Select CYW943907AEVAL1F kit in the Project Creator tool and click Next.
Figure 6 CYW943907AEVAL1F kit selection in Project Creator tool
This page lists various applications available for the CYW943907AEVAL1F kit. As you select an application, a
description displays on the right. You can select multiple applications for the selected BSP by enabling the
check box next to the applicable applications. Click Create to begin the project creation process.
Figure 7 Beginning of the project creation process
For this example:
− Select the checkbox next to the“GPIO” application.
−(Optional) Type a name for the application under New Application Name. Do not use spaces in the
application name. In this case, we use the default “GPIO”as the name.
Note: The application creation process performs a git clone operation, and downloads the selected application
from the GitHub repository. Depending on the selected application, this process can take several minutes.

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Kit operation
When complete, the Project Creator tool closes automatically. In the IDE, a message displays about importing the
project:
Figure 8 Project creation process complete
After several moments, the application opens with the GPIO in the project explorer, and the README.md file
opens in the file viewer.
Note:If the README.md file does not render correctly in the IDE, view it from code examples GitHub repo
(https://github.com/Infineon/mtb-example-cyw43907-gpio/blob/master/README.md).
Figure 9 Opening an application in Project Explorer
4. After loading the application, build it to generate the necessary files. Select a project, and then in the Quick
Panel, click the Build <project> Application link. The following images show the Quick Panel for a typical
AIROC™ CYW43907 Wi-Fi connectivity processor application.

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Kit operation
Figure 10 Build the GPIO application
5. In the Project Explorer, select the desired project. Then, in the Quick Panel, click the <app-name> Program
(FTDI) link for programming the AIROC™ CYW43907 Wi-Fi connectivity processor and for debugging select
<app-name> Debug (FTDI).
To add breakpoints, right-click at the point where you want to add the breakpoint and select Add
Breakpoint.
Figure 11 Options for programming and debugging

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Kit operation
Controls for debugging like play, step into, step return, and step over are marked in Figure 12.
Figure 12 Controls for debugging
If you prefer to use the command-line option to create the project, see the README.md file of the code
example.

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Hardware
4Hardware
4.1 User switches
There are two user switches available on the board named USER_1 and USER_2. Table 3 shows the pin names
and enumeration used in ModusToolbox™ software for the switches.
Table 3 User switch
Figure 13 User switch circuit diagram
4.1.1 LEDs
There are two user LEDs available named LED_1 and LED_2. Table 4 shows the pin name and enumeration
used in ModusToolbox™ software for these LEDs.
Note:PIN_PWM_3 LED will not act as a normal GPIO.
Table 4 User LEDs
Pin name on AIROC™ CYW43907
Enumeration in ModusToolbox™ software
LED_1
CYBSP_LED1
LED_2
CYBSP_LED2
AIROC™ CYW43907 pin name
Enumeration in ModusToolbox™ software
USER_1 (SW3)
CYBSP_SW3
USER_1 (SW1)
CYBSP_SW1

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Hardware
4.1.2 Reset control
The AIROC™ CYW43907 device can be reset using the “Target Reset” switch SW2 or a reset command from the
on board programmer/debugger and serial interface chip, as shown in Figure 14. The CYW43907 datasheet
states that HIB_REG_ON_IN needs to be delayed by at least two cycles of the 32.768-kHz clock after VBAT and
VDDIO have reached 90% of their final values. To ensure proper boot-up, the RC delay circuit for
HIB_REG_ON_IN is essential as shown in Figure 15. See 4.1 User switches for details on the RC delay circuit.
Figure 14 Reset circuit
Figure 15 HIB_REG_ON_IN RC delay circuit

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Hardware
4.2 Connectors
Header J6 on the CYW943907AEVAL1F EVK is a 44-pin header containing I2C, SDIO, UART, SPI, PWM lines, and
I/Os. Note that some signals are shared with the header compatible with Arduino (UART0 Tx/Rx) and onboard
programmer/debugger chip (UART1). Table 5 illustrates the J6 pinout.
Table 5 J6 header pinout
Evaluation board
header
CYW43907 pin name
Enumeration in ModusToolbox™ software
J6.1
PWM_4
PIN_PWM_4
J6.2
PWM_5
PIN_PWM_5
J6.3
I2S0_MCK
PIN_I2S_MCLK0
J6.4
I2S0_SD_OUT
PIN_I2S_SCLK0
J6.5
I2S0_SCK_BCLK
PIN_I2S_SDATAO0
J6.6
I2S0_WS_LRCLK
PIN_I2S_LRCLK0
J6.7
PWM_3
PIN_PWM_3
J6.8
GND
GND
J6.9
SPI_1_CLK
PIN_SPI_1_CLK
J6.10
I2S1_SD_OUT
PIN_I2S_SDATAO1
J6.11
SPI_1_MISO
PIN_SPI_1_MISO
J6.12
SPI_0_CLK
PIN_SPI_0_CLK
J6.13
SPI_1_MOSI
PIN_SPI_1_MOSI
J6.14
SPI_0_MOSI
PIN_SPI_0_MOSI
J6.15
SPI_1_CS
PIN_SPI_1_CS
J6.16
SPI_0_CS
PIN_SPI_0_CS
J6.17
SPI_0_MISO
PIN_SPI_0_MISO
J6.18
UART0_RXD_IN
PIN_UART0_RXD
J6.19
GND
GND
J6.20
UART0_TXD_OUT
PIN_UART0_TXD
J6.21
USB2_HOST_DEV_SEL
USB2_HOST_DEV_SEL
J6.22
UART0_CTS_IN
PIN_UART0_CTS
J6.23
I2C_0_SCL
PIN_I2C0_CLK
J6.24
UART0_RTS_OUT
PIN_UART0_RTS
J6.25
I2C_0_SDA
PIN_I2C0_SDATA
J6.26
I2S1_MCK
PIN_I2S_MCLK1
J6.27
I2S1_WS_LRCLK
PIN_I2S_LRCLK1
J6.28
GND
GND
J6.29
I2S1_SCK_BCLK
PIN_I2S_SCLK1
J6.30
SDIO_DATA_1
PIN_SDIO_DATA_1
J6.31
SDIO_DATA_0
PIN_SDIO_DATA_0
J6.32
SDIO_CLK
PIN_SDIO_CLK

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Hardware
Evaluation board
header
CYW43907 pin name
Enumeration in ModusToolbox™ software
J6.33
SDIO_CMD
PIN_SDIO_CMD
J6.34
SDIO_DATA_3
PIN_SDIO_DATA_3
J6.35
SDIO_DATA_2
PIN_SDIO_DATA_2
J6.36
RF_SW_CTRL_6_UART1_RXD
PIN_RF_SW_CTRL_6
J6.37
UART1_TXD
PIN_RF_SW_CTRL_7
J6.38
RF_SW_CTRL_8_UART2_RXD
PIN_RF_SW_CTRL_8
J6.39
UART2_TXD
PIN_RF_SW_CTRL_9
J6.40
HIB_WAKE
HIB_WAKE
J6.41
HIB_LPO_SEL
HIB_LPO_SEL
J6.42
HIB_REG_ON_IN
HIB_REG_ON_IN
J6.43
USB2_DN
USB2_DN
J6.44
USB2_DP
USB2_DP
4.2.1 Headers compatible with Arduino
J9, J13, J12, and J10 are headers compatible with Arduino available in the CYW943907AEVAL1F EVK. Table 6
shows the pinout. Note the following points while connecting an Arduino shield to the board:
•5-V pin of header (J9) is not connected to the board.
•The maximum current that an Arduino shield can sink from the board depends on the application that is
running. In general, 100 mA is the worst-case scenario.
•The Arduino analog reference is connected to the 3V3 (3.3 V) power supply through R21, which is not
populated by default. In other words, the analog reference is not driven by default.
Table 6 Arduino header pinout
Eval board header
CYW43907 pin name/
kit signal name
Arduino header name
Enumeration in
ModusToolbox™ software
J10.1
GPIO_0
D0
PIN_GPIO_0
J10.2
GPIO_1
D1
PIN_GPIO_1
J10.3
GPIO_13
D2
PIN_GPIO_13
J10.4
GPIO_7
D3
PIN_GPIO_7
J10.5
GPIO_14
D4
PIN_GPIO_14
J10.6
GPIO_16
D5
PIN_GPIO_16
J10.7
GPIO_15
D6
PIN_GPIO_15
J10.8
I2S0_SD_IN
D7
PIN_I2S_SDATAI0
J12.1
I2S1_SD_IN
D8
PIN_I2S_SDATAI1
J12.2
PWM_4
D9
PIN_PWM_4
J12.3
GPIO_11
D10
PIN_GPIO_11
J12.4
GPIO_10
D11
PIN_GPIO_10
J12.5
GPIO_12
D12
PIN_GPIO_12
J12.6
GPIO_9
D13
PIN_GPIO_9

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Hardware
Eval board header
CYW43907 pin name/
kit signal name
Arduino header name
Enumeration in
ModusToolbox™ software
J12.7
GND
GND
N/A
J12.8
ARD_AREF
AREF
N/A
J12.9
I2C_1_SDA
SDA
PIN_I2C1_SDATA
J12.10
I2C_1_SCL
SCL
PIN_I2C1_CLK
J13.1
ARD_AD0
A0
N/A
J13.2
ARD_AD1
A1
N/A
J13.3
ARD_AD2
A2
N/A
J13.4
ARD_AD3
A3
N/A
J13.5
ARD_AD4_SDA
A4
N/A
J13.6
ARD_AD5_SCL
A5
N/A
J9.1
NC
NC
N/A
J9.2
ARD_IOREF
IOREF
N/A
J9.3
ARD_RESET
RESET
N/A
J9.4
3V3
3.3V
N/A
J9.5
NC
5V
N/A
J9.6
GND
GND
N/A
J9.7
GND
GND
N/A
J9.8
VIN_EXT
VIN
N/A
4.3 UART port configuration
The CYW943907AEVAL1F kit has three UART ports: slow UART, fast UART, and GCI UART. Slow UART and GCI
UART are 2-wire interfaces while fast UART is a 4-wire interface that can support up to a 3 Mbps baud rate. Slow
UART is routed to the onboard programmer/debugger chip for UART to USB communication.
Note:For using debug UART, call the cy_retarget_io_init( ) function with the slow UART pins in your
application.
Table 7 UART header pinout
Pin name on CYW43907
Header pin number
Enumeration in ModusToolbox™ software
RF_SW_CTRL_6
J6:36 (slow UART RXD)
PIN_RF_SW_CTRL_6
RF_SW_CTRL_7
J6:37 (slow UART TXD)
PIN_RF_SW_CTRL_7
UART0_RXD
J6:18 (fast UART RXD)
PIN_UART0_RXD
UART0_TXD
J6:20 (fast UART TXD)
PIN_UART0_TXD
UART0_CTS
J6:22 (fast UART CTS)
PIN_UART0_CTS
UART0_RTS
J6:24 (fast UART RTS)
PIN_UART0_RTS
RF_SW_CTRL_8
J6:38 (GCI UART RXD)
PIN_RF_SW_CTRL_8
RF_SW_CTRL_9
J6:39 (GCI UART TXD)
PIN_RF_SW_CTRL_9