CY8CKIT-022
CapSense Liquid Level Sensing Shield
Kit Guide
Doc. #: 002-09825 Rev. *D
Cypress Semiconductor
198 Champion Court
San Jose, CA 95134-1709
www.cypress.com
Copyrights
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CY8CKIT-022 CapSense Liquid Level Sensing Shield Kit Guide, Doc. #: 002-09825 Rev. *D
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Contents
Safety Information
1. Introduction
1.1
1.2
1.3
1.4
1.5
1.6
1.7
1.8
1.9
2.4
7
Kit Contents .................................................................................................................7
Getting Started.............................................................................................................8
Additional Resources ...................................................................................................9
Hardware Requirements..............................................................................................9
Software Requirements .............................................................................................10
1.5.1 PSoC Creator.................................................................................................10
1.5.2 PSoC Programmer.........................................................................................10
Application Notes and Projects..................................................................................10
Technical Support......................................................................................................10
Documentation Conventions......................................................................................11
Acronyms...................................................................................................................11
2. Kit Hardware
2.1
2.2
2.3
5
12
Board Details .............................................................................................................12
Kit Assembly ..............................................................................................................15
Theory of Operation...................................................................................................17
2.3.1 Principle of Capacitive Liquid Level Sensing .................................................17
2.3.2 CY8CKIT-022 Kit............................................................................................18
Functional Description ...............................................................................................19
2.4.1 Two Sensor Flexible PCB ..............................................................................19
2.4.2 12 Sensor Flexible PCB .................................................................................19
2.4.3 Flexible Sensor Connector.............................................................................20
2.4.4 Arduino-Compatible Headers.........................................................................20
2.4.5 Temperature Compensation Sensor ..............................................................22
2.4.6 Integration Capacitors ....................................................................................22
2.4.7 UART Connection ..........................................................................................23
2.4.8 Liquid Container .............................................................................................23
3. Example Projects
24
4. Design Support
25
CY8CKIT-022 CapSense Liquid Level Sensing Shield Kit Guide, Doc. #: 002-09825 Rev. *D
3
Contents
A. Appendix
A.1
A.2
A.3
A.4
A.5
A.6
A.7
26
Shield Schematic .......................................................................................................26
2RX Sensor Schematic..............................................................................................27
12RX Sensor Schematic............................................................................................28
Shield Layout .............................................................................................................29
2RX Sensor Layout....................................................................................................30
12RX Sensor Layout..................................................................................................31
Bill of Materials ..........................................................................................................32
Revision History
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4
Safety Information
Regulatory Compliance
The CapSense Liquid Level Sensing Shield Kit (CY8CKIT-022) 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. This 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, you may be required to take adequate preventive measures. In addition,
this board should not be used 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 should be taken.
The Liquid Level Sensing Shield Kit, as shipped from the factory, has been verified to meet with the
requirements of CE as a Class A product.
The Liquid Level Sensing Shield Kit contains 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 kit boards
in the protective shipping package.
End-of-Life/Product Recycling
This kit has an end-of life five years from the date of
manufacture mentioned on the back of the box. Contact your
nearest recycler for discarding the kit.
CY8CKIT-022 CapSense Liquid Level Sensing Shield Kit Guide, Doc. #: 002-09825 Rev. *D
5
Safety Information
General Safety Instructions
ESD Protection
ESD can damage boards and associated components. Cypress recommends that you perform
procedures only at an ESD workstation. If such a workstation is not available, use appropriate ESD
protection by wearing an antistatic wrist strap attached to the chassis ground (any unpainted metal
surface) on your board when handling parts.
Handling Boards
CY8CKIT-022 boards are sensitive to ESD. Hold the board only by its edges. Do not slide the board
over any surface.
CY8CKIT-022 CapSense Liquid Level Sensing Shield Kit Guide, Doc. #: 002-09825 Rev. *D
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1.
Introduction
Thank you for your interest in the CapSense® Liquid Level Sensing Shield Kit (CY8CKIT-022). This
kit is intended to demonstrate the Liquid Level Sensing (LLS) capabilities of the CapSense
technology in Cypress’s PSoC® 4 products.
This kit supports the following liquid level sensing features:
■
Non-contact measurement of liquid levels from sensors located on the exterior of the nonconductive liquid container. Avoids contamination and cleaning issues found with mechanical and
contact sensors, simplifying industrial design and improving user experience.
■
Supports two different sensor patterns. A two sensor ‘Backgammon’ shaped pattern provides
liquid level sensing at a low cost point while a multi sensor ‘Segmented’ pattern provides
increased accuracy that can be optimized for each design by varying the number and shape of
sensors.
This kit guide provides details on the kit contents, hardware, schematics, and BOM. See Code
Example CE202479 for example projects developed for use with this kit and
AN202478 - PSoC 4 - Capacitive Liquid Level Sensing for theory, design guidance, and sensor
layout information.
1.1
Kit Contents
The CapSense Liquid Level Sensing Shield Kit contains the following, as shown in Figure 1-1.
■
CapSense® Liquid Level Sensing Shield board
■
CapSense Liquid Level Sensing 12 Sensor Flex PCB
■
CapSense Liquid Level Sensing 2 Sensor Flex PCB
■
Liquid container
■
Quick Start Guide
CY8CKIT-022 CapSense Liquid Level Sensing Shield Kit Guide, Doc. #: 002-09825 Rev. *D
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Introduction
Figure 1-1. Kit Contents
Inspect the contents of the kit; if you find any part missing, contact your nearest Cypress sales office
for help.
1.2
Getting Started
This guide will help you get acquainted with the CapSense Liquid Level Sensing Shield Kit:
■
The Kit Hardware chapter on page 12 describes how to assemble and use the kit’s resources.
■
The Example Projects chapter on page 24 provides the major features of the Liquid Level
Sensing Shield Kit.
■
The Design Support chapter on page 25 provides information on documents and resources
required to start new liquid level sensing desings with PSoC 4 CapSense.
■
The Appendix chapter on page 26 provides detailed hardware description, schematics, and bill of
materials (BOM).
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Introduction
1.3
Additional Resources
Cypress provides a wealth of data at www.cypress.com to help you select the right PSoC device for
your design, and to help you to quickly and effectively integrate the device into your design. For a
comprehensive list of resources, visit http://www.cypress.com/psoc. The web page includes a list of
PSoC device families, integrated design environments (IDEs), and associated development kits. In
addition, refer to the following documents to get started with PSoC 4 devices and CapSense
technology:
1.4
■
AN79953 - Getting Started with PSoC® 4
■
Getting Started with CapSense®
■
PSoC® 4 CapSense® Design Guide
■
AN202478 - PSoC 4 - Capacitive Liquid Level Sensing
■
CE202479 - Code Example for Liquid Level Sensing
■
PSoC 101 Training Series
Hardware Requirements
CY8CKIT-022 plugs into any Arduino™ hardware-compatible development platform from Cypress.
CE202479 provides example projects targeting the CY8CKIT-042 PSoC 4 Pioneer Kit.
Figure 1-2 shows how the CY8CKIT-022 kit connects to the CY8CKIT-042 kit.
Visit http://www.cypress.com/CY8CKIT-042 to purchase the CY8CKIT-042 kit.
Figure 1-2. CY8CKIT-022 Connected to CY8CKIT-042
CY8CKIT-022 CapSense Liquid Level Sensing Shield Kit Guide, Doc. #: 002-09825 Rev. *D
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Introduction
1.5
Software Requirements
The CY8CKIT-022 kit does not have any programmable/configurable devices onboard, so it does not
need any software for configuration. However, the PSoC device present on the CY8CKIT-042
baseboard requires firmware which you can develop with the PSoC Creator IDE (Version 3.3 CP1 or
later).
1.5.1
PSoC Creator
PSoC Creator allows concurrent hardware and application firmware design of PSoC 3, PSoC 4, and
PSoC 5LP systems. PSoC systems are designed using classic, familiar, schematic-capture technology supported by pre-verified, production-ready PSoC Components™.
PSoC Components are analog and digital virtual chips represented by icons that you can drag and
drop into a design and configure to suit a broad array of application requirements. You can configure
each Component in the rich, mixed-signal Cypress Component Catalog with the Component Customizer tool. These Components include a full set of dynamically generated API libraries. After you
have configured the PSoC system, you can write, compile, and debug the firmware within PSoC
Creator, or export the firmware to other IDEs such as those from IAR, Keil, and Eclipse.
You can download the latest version of the PSoC Creator software from http://www.cypress.com/
psoccreator. Refer to the Release Notes for the minimum and recommended system requirements.
1.5.2
PSoC Programmer
The PSoC Programmer software is used to program the PSoC devices on the CY8CKIT-042 kit with
hex files. You can download PSoC Programmer at http://www.cypress.com/go/psocprogrammer.
1.6
1.7
Application Notes and Projects
■
AN202478 - PSoC 4 - Capacitive Liquid Level Sensing provides detailed theory, design
guidance, and sensor layout information for explaining this kits operation as well as developing a
new liquid level sensing design.
■
CE202479 contains example projects that demonstrate the following features of the
CY8CKIT-022 kit:
❐
Liquid level measurement using capacitive sensors
❐
Two sensor (2RX) project for use with the low cost 2RX flexible sensor
❐
Twelve sensor (12RX) project for use with the increased accuracy 12RX flexible sensor
❐
See the Appendix chapter on page 26 in this kit guide for details.
Technical Support
For assistance, visit Cypress Support or contact customer support at +1 (800) 541-4736 Ext. 2 (in
the USA) or +1 (408) 943-2600 Ext. 2 (International).
You can also use the following support resources if you need quick assistance:
■
Self-help (Technical Documents)
■
Local Sales Office Locations.
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Introduction
1.8
Documentation Conventions
Table 1-1. Document Conventions for Guides
Convention
1.9
Usage
Courier New
Displays file locations, user entered text, and source code:
C:\ ...cd\icc\
Italics
Displays file names and reference documentation:
Read about the sourcefile.hex file in the PSoC Designer User Guide.
[Bracketed, Bold]
Displays keyboard commands in procedures:
[Enter] or [Ctrl] [C]
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.
Acronyms
Table 1-2. Acronyms Used in the Document
Acronym
LLS
Description
Liquid Level Sensing
CL
Liquid Capacitance
CP
Parasitic Capacitance
GND
Ground
IDE
Integrated Design Environment
PCB
IO
USB
UART
PET
Printed Circuit Board
Input Output Pin
Universal Serial Bus
Universal Asynchronous Receiver/Transmitter
Polyethylene Terephthalate
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2.
2.1
Kit Hardware
Board Details
The CY8CKIT-022 kit contains the following components:
■
■
CapSense® Liquid Level Sensing Shield board
❐
Arduino-compatible headers to interface the Cypress PSoC 4 Pioneer Kit pins to the flexible
liquid sensor connector pins
❐
Connects PSoC 4 Pioneer UART pins to Pioneer KitProg UART pins
❐
Optional temperature compensation sensor
CapSense Liquid Level Sensing 2 Sensor Flex PCB
❐
■
Low cost design provides two sensors (RX0, RX1) for liquid level measurement and a ground
plane (TX0) to improve signal uniformity
CapSense Liquid Level Sensing 12 Sensor Flex PCB
❐
Higher accuracy design provides 12 sensors (RX[0:11]) for liquid measurement
Figure 2-1 through Figure 2-4 show the top and bottom views of the CY8CKIT-022 board.
Figure 2-1. CY8CKIT-022 Shield Board (Top View)
CY8CKIT-022 CapSense Liquid Level Sensing Shield Kit Guide, Doc. #: 002-09825 Rev. *D
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Kit Hardware
Figure 2-2. CY8CKIT-022 Shield Board (Bottom View)
Figure 2-3. Top View of both CY8CKIT-022 Sensors
CY8CKIT-022 CapSense Liquid Level Sensing Shield Kit Guide, Doc. #: 002-09825 Rev. *D
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Kit Hardware
Figure 2-4. Bottom View of both CY8CKIT-022 Sensors
CY8CKIT-022 CapSense Liquid Level Sensing Shield Kit Guide, Doc. #: 002-09825 Rev. *D
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Kit Hardware
2.2
Kit Assembly
Follow these assembly steps to operate the kit:
1. Remove the adhesive sticker from the back of one of the CapSense Liquid Level Sensor Flex
PCB and then paste the sensor onto the liquid container, as shown in Figure 2-5. Center the sensor on one of the flat sides so the top of the sensor is aligned with the top of the flat section. This
placement will result in the 0 mm (0%) line on the sensor being approximately 15 mm from the
bottom of the container.
Note If the sensor flex is placed too low on the container, the radius of bend on the flex tail may
cause the container to become unstable.
Figure 2-5. Placing the Sensor
2. Thoroughly press the entire sensor area to the container to ensure there are no air bubbles in the
adhesive layer. Air bubbles allow the distance between the sensor and the liquid to fluctuate.
Distance changes cause changes to the sensor’s capacitance resulting in reduced liquid level
accuracy. Air bubbles can be observed through the adhesive layer on the back of the sensor
through the bottle.
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Kit Hardware
3. Connect the CapSense Liquid Level Sensing Shield onto the CY8CKIT-042 PSoC 4 Pioneer Kit
Arduino header, as shown in Figure 2-6, and confirm if the PSoC 4 Pioneers kits jumpers are in
default positions.
Figure 2-6. Kit Connections
4. Connect the CapSense Liquid Level Sensing Flex PCB to the CapSense Liquid Level Sensing
Shield.
5. Connect the CY8CKIT-042 to your PC using the provided USB cable.
6. Compatible firmware and operating instructions are provided in code example CE202479.
CY8CKIT-022 CapSense Liquid Level Sensing Shield Kit Guide, Doc. #: 002-09825 Rev. *D
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Kit Hardware
2.3
Theory of Operation
For a detailed explanation on the theory of operation of this kit, refer to AN202478 - PSoC 4 Capacitive Liquid Level Sensing.
This section provides a high-level description of the principle of capacitive sensing and describes
where the CY8CKIT-022 kit and PSoC devices fit in a capacitive liquid level sensing system.
2.3.1
Principle of Capacitive Liquid Level Sensing
Capacitive liquid level sensors are conductive pads or traces laid on non-conductive material such
as PCB, plastic, or glass. The intrinsic capacitance of the PCB trace, pads, and other connections to
the sensor results in a sensor parasitic capacitance (CP). When a capacitive sensor is excited by a
voltage source, an electric field is created around the sensor. A small number of electric field lines
couple with the nearby ground, while most of the electric field lines are projected into the nearby
space of the liquid container, as shown in Figure 2-7.
When a target object such as water approaches the sensor, the electric field couples with it and adds
small amount of liquid capacitance (CL) to the existing CP, as shown in Figure 2-8. The capacitive
liquid level sensing technique involves measuring this change in the capacitance of a sensor when
water is near the sensor.
Figure 2-7. Capacitance and Electric Field of a Capacitive Liquid Level Sensor
Container Wall
Ground
CP
Liquid
Sensor
CP
Ground
PCB
Figure 2-8. Added Capacitance (CL) When Liquid Approaches a Capacitive Sensor
CL
Container Wall
Ground
CP
Liquid
Sensor
CP
Ground
PCB
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Kit Hardware
2.3.2
CY8CKIT-022 Kit
The CY8CKIT-022 kit contains capacitive sensors attached to a liquid container. These sensors can
be interfaced with PSoC 4 devices present on Cypress PSoC 4 Pioneer Kits through Arduinocompatible headers, as shown in Figure 2-9.
Figure 2-9. CY8CKIT-022 System Block Diagram
In the CY8CKIT-022 system, the CapSense circuitry in the PSoC device on the baseboard (such as
CY8CKIT-042) senses the changes in the capacitance of the liquid level sensors on the
CY8CKIT-022 kit. The PSoC calculates the liquid level based on the information about capacitance
changes on different sensors received from the CapSense block.
You can program the PSoC device on the baseboard through the onboard KitProg hardware, which
communicates to the software programming tool (PSoC Programmer) through the USB interface on
the board. You can develop firmware applications for PSoC 4 devices by using PSoC Creator.
CE202479 provides code example projects that you can use with the CY8CKIT-022 system to
implement liquid level sensing solutions.
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Kit Hardware
2.4
Functional Description
2.4.1
Two Sensor Flexible PCB
The signal ratio from the two sensors (RX0 and RX1) provides a low cost method of determining
liquid height. The pattern shown in Figure 2-10 is similar to a backgammon game board, and is
therefore referred to as the “backgammon” pattern. A third transmitter (TX0) sensor is provided to
support the CapSense mutual capacitance scanning method, and can be connected as a CapSense
transmitter. If CapSense self capacitance scanning is used, then the TX0 sensor is not required and
must be grounded to avoid interfering with the RX0 and RX1 sensors. The flexible PCB comes with
a non-conductive double sided adhesive already applied. To use the sensor, it must be adhered to
the flat side of the supplied liquid container and attached to the kit shield board.
Figure 2-10. 2RX Sensor Pattern
2.4.2
12 Sensor Flexible PCB
Each segment of the 12 sensor (RX[0:11]) pattern shown in Figure 2-11 provides an incremental
portion of the total liquid level. While the “segmented” pattern requires additional sensor elements
and pin compared to the 2RX version, it allows liquid level resolution to be customized for each
design. For use with CapSense self capacitance scanning, only the sensors RX[0:11] must be
connected to the PSoC CapSense I/O pins and the TX0 sensor can be left floating or tied to ground.
When CapSense mutual capacitance scanning is used, all of the RX and TX sensors must be
connected. A small ground plane hatch between the RX and TX sensors is provided to help direct
the electrical field into the liquid to increase sensitivity.
Figure 2-11. 12RX Sensor Pattern
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Kit Hardware
2.4.3
Flexible Sensor Connector
Connector (J5) allows easy connection of sensors to the PSoC on the Pioneer kit. The connector
shown in Figure 2-12 provides connection of up to 13 sensors (RX[0:12]). A single transmitter
connection (TX0) is provided for use with sensors utilizing the CapSense Mutual-Capacitance Scan
method. The TX0 signal includes a 470 series resistor to slow edge rates and reduce radiated
emissions. The connector can be used with the kit supplied sensors or a custom user created
sensor.
Figure 2-12. Sensor Connector
2.4.4
Arduino-Compatible Headers
The I/O headers (J1-J4) comply with the Arduino™ UNO (R3) kit form-factor to support similar formfactor baseboards, as provided in Table 2-1 through Table 2-4.
Table 2-1. J1 Arduino Header or Power Connector
Pin
Arduino Board Signal
CY8CKIT-022
CY8CKIT-042
J1.1
VIN
–
VIN
J1.2
GND
GND
GND
J1.3
GND
GND
GND
J1.4
V5.0
–
V5.0
J1.5
V3.3
–
V3.3
J1.6
RESET
–
RESET
J1.7
IOREF
–
P4.VDD
J1.8
NC
–
–
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Kit Hardware
Table 2-2. J2 Arduino Header
Pin
Arduino Board Signal
CY8CKIT-022
CY8CKIT-042
J2.1
A0
CintA
P2.0
J2.2
–
–
P0.2
J2.3
A1
CintB
P2.1
J2.4
–
–
P0.3
J2.5
A2
RX2
P2.2
J2.6
–
–
VDD
J2.7
A3
RX1
P2.3
J2.8
–
RX4
P1.5
J2.9
A4
RX0
P2.4
J2.10
–
–
P1.4
J2.11
A5
TX0
P2.5
J2.12
–
RX3
P1.3
J2.13
–
–
P0.0
J2.14
–
–
GND
J2.15
–
RX12
P0.1
J2.16
–
–
P1.2
J2.17
–
–
P1.0
J2.18
–
–
P1.1
CY8CKIT-022
CY8CKIT-042
D8
RX6
P2.6
J3.2
D9
RX5
P3.6
J3.3
D10
–
P3.4
J3.4
D11
–
P3.0
J3.5
D12
–
P3.1
Table 2-3. J3 Arduino Header
Pin No. Arduino Board Signal
J3.1
J3.6
D13
–
P0.6
J3.7
GND
GND
GND
J3.8
AREF
–
P1.7
J3.9
SDA
–
P4.1
J3.10
SCL
–
P4.0
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Kit Hardware
Table 2-4. J4 Arduino Header
Pin No. Arduino Board Signal
2.4.5
CY8CKIT-022
CY8CKIT-042
J4.1
D0
UART_RX
P0.4
J4.2
D1
UART_TX
P0.5
J4.3
D2
–
P0.7
J4.4
D3
RX11
P3.7
J4.5
D4
RX10
P0.0
J4.6
D5
RX9
P3.5
J4.7
D6
RX8
P1.0
J4.8
D7
RX7
P2.7
Temperature Compensation Sensor
RX12 sensor on the shield board provides the ability to measure and compensate for environmental effects such
as temperature on the liquid level sensors. Use of RX12 sensor for compensation is optional. RX12 is also
brought out to the sensor connector (J5-9) although the supplied kit sensors do not use RX12. User can add an
RX12 sensor connected to J5-9. In this case, resistor (R1) shown in Figure 2-13 must be removed from the
Shield board to disconnect the onboard sensor.
Figure 2-13. Sensor RX12
2.4.6
Integration Capacitors
Two integration capacitors are provided to support CapSense Mutual-Capacitance Scanning
method. Figure 2-14 shows the capacitors CintA on J2-1 and CintB on J2-3. The Cint capacitors on
this shield can be used with Pioneer kits that do not natively support Cint capacitors.
Figure 2-14. Integration Capacitors
CY8CKIT-022 CapSense Liquid Level Sensing Shield Kit Guide, Doc. #: 002-09825 Rev. *D
22
Kit Hardware
2.4.7
UART Connection
A dedicated connection is provided to connect the PSoC 4 I/O pins on J4-1 and J4-2 to the KitProg
UART pins on J6-1 and J6-2. The J6 shield pins connect to the pioneer kit’s KitProg J8 header, pin
J8-9 (UART TX) and J8-10 (UART RX). The PSoC 4 device used on the CY8CKIT-040 kit does not
provide a UART peripheral; therefore, the UART connection is not used with this kit. All other
Pioneer kits provide an onboard UART connection; therefore, the J6 connection is not used with
these kits. The UART connection shown in Figure 2-15 allows the liquid level sensing firmware to
implement a terminal interface for user interaction.
Figure 2-15. UART Connection
2.4.8
Liquid Container
The 32 oz Square PET plastic liquid container is provided for use with the flexible sensors. User
supplied container can be used in its place if it is compatible with the sensor dimensions. You can
also purchase the kit container (Item Number: 70348) from www.usplastic.com.
Hot water above 170 °F/80 °C can cause PET plastic to deform. Extremely hot water should be
avoided as the liquid container provided in the CY8CKIT-022 kit is made of PET plastic.
CY8CKIT-022 CapSense Liquid Level Sensing Shield Kit Guide, Doc. #: 002-09825 Rev. *D
23
3.
Example Projects
CY8CKIT-022 can be used with Cypress PSoC 4 Pioneer Kits to evaluate the liquid level sensing
capabilities of CapSense in Cypress PSoC products. Code Example CE202479 contains example
projects that demonstrate the following features of CY8CKIT-022:
■
Liquid level measurement using capacitive sensors
■
Two sensor (2RX) project for use with the low cost 2RX flexible sensor
■
12 sensor (12RX) project for use with the increased accuracy 12RX flexible sensor
CY8CKIT-022 CapSense Liquid Level Sensing Shield Kit Guide, Doc. #: 002-09825 Rev. *D
24
4.
Design Support
Refer to the following documents and resources to start new liquid level sensing designs with
PSoC 4 CapSense technology:
■
Getting Started with CapSense® Design Guide
■
AN79953 - Getting Started with PSoC® 4
■
PSoC 4 CapSense Design Guide
■
AN202478 - PSoC 4 - Capacitive Liquid Level Sensing
■
PSoC 4000, PSoC 4100, or PSoC 4200 Datasheet
■
Online Technical Support
■
Local Sales Support
Cypress recommends that you create a Technical Support Case for getting schematics and Layouts
of CapSense designs reviewed with Cypress.
Go to the webpage, www.cypress.com/techsupport, for creating a tech support case.
CY8CKIT-022 CapSense Liquid Level Sensing Shield Kit Guide, Doc. #: 002-09825 Rev. *D
25
A.
A.1
Appendix
Shield Schematic
J1
7
6
5
4
GND
3
2
1
J3
10
NC
9
*1'
TP1
IORef
8
Reset
7
1
8
V3.3
6
V5.0
5
GND
4
GND
3
VIN
P9101-08-D32-1
RX5
2
RX6
1
SCL
J5
SDA
TX0_R
AREF
RX9
RX7
RX12
RX2
RX4
RX5
GND
D13
D12
1
3
5
7
9
11
13
15
1
3
5
7
9
11
13
15
2
4
6
8
10
12
14
16
2
4
6
8
10
12
14
16
RX11
RX10
RX8
RX0
RX1
RX6
RX3
SFH11-PBPC-D08-RA-BK
D11
D10
D9
D8
P9101-10-D32-1
CintB
CintA
C2
C1
470PF 50V 5% NP0 0805
470PF 50V 5% NP0 0805
J2
CintA
1
CintB
3
RX2
5
RX1
7
RX0
9
R4
TX0_R 470 OHM TX0
11
13
RX12
15
17
A0
2
A1
4
A2
6
A3
8
A4
10
A5
12
13
14
15
16
17
18
2
J4
4
6
8
RX4
10
12
RX3
RX7
8
RX8
7
RX9
6
RX10
5
RX11
4
3
14
16
18
UART_TX
2
UART_RX
1
D7
D6
D5
CintA
D3
D2
D1
D0
P9101-08-D32-1
P9103-18-D32-1
CintB
D4
CSS1
1
R1
ZERO, 0603
RX12
RX_Sensor
Dimensions: 2cmx2cm
Note: RX_Sense is required for Temperature Compensation
Arduino Headers
J6
R2
UART_RX ZERO, 0603
1
UART_TX R3
2
ZERO, 0603
P9101-02-D32-1
Note: Align this header to pin 9 (UART RX) and
10 (UARRT TX) of J8 connector on 042/044 Pioneer kits
UART
CY8CKIT-022 CapSense Liquid Level Sensing Shield Kit Guide, Doc. #: 002-09825 Rev. *D
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Appendix
A.2
2RX Sensor Schematic
CY8CKIT-022 CapSense Liquid Level Sensing Shield Kit Guide, Doc. #: 002-09825 Rev. *D
27
Appendix
A.3
12RX Sensor Schematic
CY8CKIT-022 CapSense Liquid Level Sensing Shield Kit Guide, Doc. #: 002-09825 Rev. *D
28
Appendix
A.4
Shield Layout
Figure A-1. Top Layer
Figure A-2. Bottom Layer
CY8CKIT-022 CapSense Liquid Level Sensing Shield Kit Guide, Doc. #: 002-09825 Rev. *D
29
Appendix
A.5
2RX Sensor Layout
Figure A-3. Top Layer
Figure A-4. Bottom Layer
CY8CKIT-022 CapSense Liquid Level Sensing Shield Kit Guide, Doc. #: 002-09825 Rev. *D
30
Appendix
A.6
12RX Sensor Layout
Figure A-5. Top Layer
Figure A-6. Bottom Layer
CY8CKIT-022 CapSense Liquid Level Sensing Shield Kit Guide, Doc. #: 002-09825 Rev. *D
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Appendix
A.7
Bill of Materials
Item
Qty
Reference
1
1
PCB
2
2
Description
Manufacturer
Mfr Part Number
PCB, FR4, 2 layer, High Tg, Mask - Red,
Cypress Semiconductor
Silk - White
600-60288-01
C1, C2
CAP CER 470PF 50V 5% NP0 0805
Murata Electronics
GRM2165C1H471JA01D
Protectron Electromech
P9101-08-D32-1
3
2
J1, J4
HDR, 2.54mm PITCH, SINGLE ROW,
8POS, 13mm, MATING LENGTH
4
1
J2
HDR, 2.54mm PITCH, DUAL ROW,
18POS, 13mm, MATING LENGTH
Protectron Electromech
P9103-18-D32-1
5
1
J3
HDR, 2.54mm PITCH, SINGLE ROW,
10POS, 13mm, MATING LENGTH
Protectron Electromech
P9101-10-D32-1
6
1
J5
CONN 2.54MM 16POS GOLD R/A
Sullins Connector Solutions SFH11-PBPC-D08-RA-BK
7
1
J6
HDR, 2.54mm PITCH, SINGLE ROW,
2POS, 13mm, MATING LENGTH
Protectron Electromech
P9101-02-D32-1
8
1
R1
RES SMD 0.0OHM JUMPER 1/10W
0603
Panasonic
ERJ-3GEY0R00V
9
2
R2, R3
RES SMD 0.0OHM JUMPER 1/10W
0603
Panasonic
ERJ-3GEY0R00V
10
1
R4
RES SMD 470 OHM 5% 1/10W 0603
Panasonic
ERJ-3GEYJ471V
11
1
TP1
TEST POINT PC MINI .040"D Black
Keystone Electronics
5001
CY8CKIT-022 CapSense Liquid Level Sensing Shield Kit Guide, Doc. #: 002-09825 Rev. *D
32
Revision History
Document Revision History
Document Title: CY8CKIT-022 CapSense Liquid Level Sensing Shield Kit Guide
Document Number: 002-09825
Revision
ECN
Issue Date
**
5032502
12/03/2015
Description of Change
*A
5751159
06/21/2017
Updated Cypress Logo and Copyright.
*B
6201449
06/11/2018
Updated Example Projects chapter on page 24:
Initial version of kit guide.
Updated description.
Added figure “Project Settings – Compiler Command Line Parameter”.
Updated to new template.
*C
6486278
02/15/2019
No technical updates.
*D
6792941
01/30/2020
Updated Introduction chapter on page 7:
Completing Sunset Review.
Updated “Kit Contents” on page 7:
Updated description.
Added Figure 1-1.
Updated Example Projects chapter on page 24:
Updated description.
Removed figure “Project Settings – Compiler Command Line Parameter”.
Updated to new template.
CY8CKIT-022 CapSense Liquid Level Sensing Shield Kit Guide, Doc. #: 002-09825 Rev. *D
33
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