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EVT0023 PSoC Capsense Evaluation Kit Manual Future Electronics

Authors: P. DaheleDate: 01st October 2007Revision: 1.0Source: Future Electronics Ltd., Future House, Poyle Road, Colnbrook, Berks SL3

0AA UK

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PSoC Capsense Evaluation Kit

Manual Rev1.0

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Revision Change Notes:

Rev1.0 Initial Version

P. Dahele 1st October 2007

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Table of Contents

Table of Contents.....................................................................3Figure 1 PSoC Capsense Evaluation Kit 5...................................5

Figure 2 EVT Board 6................................................................5

Figure 3 Screen shot of the Bootloader program 8......................5

Figure 4 Screen shot of the monitoring application 10................5

Figure 5 Schematic Block Diagram for the EVT-0023 board. 11... .5

Figure 6 Connections for connecting to Target using I2C interface15.............................................................................................5

Figure 7 Connections for connecting to target board using GPIO15.............................................................................................5

Figure 8 Connections for connecting to target board using a UART16.............................................................................................5

Figure 9 Connections for using the RS232 interface 17..............5

Table 1 Converter Rating 12......................................................5

Table 2 5V Bus for connecting to target board 12......................5

Table 3 Programming and I2C Port Signals 13............................5

Table 4 Header Signals 14.........................................................5

Table 5 DIP Switch setting 14....................................................5

Table 6 DIP switch setting for using GPIO 16..............................5

Scope.......................................................................................6

Quickstart Guide.......................................................................61.1 Supplied with PSoC Capsense Evaluation Kit............................................................... 61.2 Set-up ............................................................................................................................71.3 Standalone operation .....................................................................................................81.4 Installing the Future Application Program ......................................................................91.4.1 Programming the PSoC Device .................................................................................91.5 Operation using monitoring application ........................................................................111.5.1 Using the Monitoring Application .............................................................................11

Detailed Description ...............................................................121.6 Introduction ..................................................................................................................121.7 Description of EVM Board ............................................................................................121.7.1 Standalone Operation ..............................................................................................131.7.2 Monitor by Computer ...............................................................................................131.7.3 Power Supply Infeed ................................................................................................131.7.4 Buttons 141.7.5 Testing 141.7.6 Buzzer 141.7.7 Potentiometer ..........................................................................................................141.7.8 Programming Port.................................................................................................... 141.7.9 Header 15

1.7.10 DIP Switches .........................................................................................................151.7.11 RS232 Port............................................................................................................ 151.7.12 Other Devices ........................................................................................................151.8 Interfacing with a Target Board ....................................................................................161.8.1 Using I2C interface to connect to Target Board .......................................................16

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EVT0023 PSoC Capsense Evaluation Kit Manual Future Electronics1.8.2 Using GPIO Input/Output interface to connect to Target Board ...............................161.8.3 Using UART Tx/Rx interface to connect to Target Board ........................................171.8.4 Using the RS232 transceiver to monitor the target board through UART .......... .... ..181.8.5 Using PSoC to generate a DC voltage for the target board:....................................18

Accompanying CD ..................................................................191.9 Tools ............................................................................................................................191.10 Hardware details .......................................................................................................191.11 Code ..........................................................................................................................191.12 Capsense Application Notes ......................................................................................191.13 Data Sheets ...............................................................................................................19

Schematics.............................................................................19

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List of Figures

Figure 1 PSoC Capsense Evaluation Kit ......................................6

Figure 2 EVT Board....................................................................7

Figure 3 Screen shot of the Bootloader program.........................9

Figure 4 Screen shot of the monitoring application....................11

Figure 5 Schematic Block Diagram for the EVT-0023 board.........12

Figure 6 Connections for connecting to Target using I2C interface16

Figure 7 Connections for connecting to target board using GPIO 16

Figure 8 Connections for connecting to target board using a UART17

Figure 9 Connections for using the RS232 interface ..................18

List of Tables

Table 1 Converter Rating..........................................................13

Table 2 5V Bus for connecting to target board..........................13

Table 3 Programming and I2C Port Signals................................14

Table 4 Header Signals.............................................................15

Table 5 DIP Switch setting........................................................15

Table 6 DIP switch setting for using GPIO..................................17

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PSoC Capsense Evaluation Kit

Manual R0.1

Scope

This manual covers hardware reference information for the production release of the PSoCCap Sense Evaluation Kit featuring CY8C21434 PSoC device.

The Cypress product covered in this release of Capsense Evaluation Kit is:-

The CY8C21434 PSoC device includes the Core, the System Resources, the DigitalSystem, and the Analog System. Configurable global bus resources allow all the deviceresources to be combined into a complete custom system. Each CY8C21x34 PSoC deviceincludes four digital blocks and four analog blocks. Depending on the PSoC package, up to28 general purpose IO (GPIO) are also included. The GPIO provide access to the globaldigital and analog interconnects.

Quickstart Guide

This section covers instructions for setting up the evaluation board.

1.1 Supplied with PSoC Capsense Evaluation Kit

Supplied with PSoC Capsense Evaluation Kit are the following:-

1. PSoC Capsense Evaluation Board

2. RS232 Serial Cable3. Power Adaptor (12V, 500mA)4. Travel Adaptor5. Reference CD6. Quick Start Guide

Figure 1 PSoC Capsense Evaluation Kit

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1.2 Set-up

The Diagram below (Figure 2Figure 2 EVT Board) identifies the connectors, headers, DIPswitches and touch buttons.

Figure 2 EVT Board

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Item SchematicRef

Description

1 CON1 RS232 Serial Port for interfacing with Computer

2 CON4 12Vdc Power Supply Input

3 VR1 Variable Resistor for ADC function

4 S1-S8 Capsense Touch Pad with LED indicator

5 S9-S13 Capsense Slide Bar with dual-digits 7-segments display

6 SW1 DIP Switch (for internal /external resource configure)

7 CON3 ISSP or I2C Interfacefor Cypress Mini-Prog1 programming or I2C communication

8 CON2 GPIO and External Serial Port Interface

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1.3 Standalone operation

With the Project 2 loaded the functionality of PSoC Capsense Evaluation Board can bedemonstrated in standalone mode. The board is shipped with this project loaded. Project 2code is available on the accompanying CD at:

\Released Code\Demo Project\Project2\HexCode\Ver1_06\HexCodeEVT-0023-HWV2-PRJ-2-R1_06.hex

In this project the status of each button is indicated with an LED at the centre of each button.

The position of the slider or the potentiometer is indicated on a 2 Digit LED display.

1. Set all the DIP switches to ON.

2. Plug the 12Vdc power adaptor into the DC Jack Socket labelled 2 above.This launches the pre-loaded evaluation program.

3. Press a Touch Pad to operate the button.The LED at the centre of the button is toggled to provide visual feedback.If enabled the buzzer also sounds for a short time to provide audio feedback.

4. When none of the buttons are activated, all button LEDs OFF, the position of thepotentiometer is displayed on the 7-segment LED display.If enabled the buzzer also sounds for a short time to provide audio feedback.

5. When any button is activated, any button LED is ON, moving a finger along the slide baror touching the + or - sign to changes the slider value.The value is displayed on the 7-segment LED display.If enabled the buzzer also sounds for a short time to provide audio feedback.

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1.4 Installing the Future Application Program

From the CDROM provided, run:Setup.exein the directory folder

\software\SDC CapSense Application\PC Application & Bootloader.

This will install the Future application software which has the following two components forWindow98SE / XP / 2000.

A bootloader program for downloading programs to the EVT Board

Monitor to visualise the status of the EVT Board

A short cut to the monitor is also placed on the desk top.Note that you will need administrator rights for installing this application.

1.4.1 Programming the PSoC Device

The PSoC device can be programmed either using the Bootloader Application or the PSoCMiniProg. This is not included in the kit but is available with Future Electronics (Future PartNumber CY3210-MINIPROG1). The following sections describe the use of both thesemethods.

1.4.1.1 Programming using the Bootloader Application

The Future Application also includes a bootloader program for downloading programs to theEVT Board.

1. Make sure the EVM board is disconnected from the power supply.2. At the Menu Tab, select Tools / Bootloader to start the bootloader application.3. Select the correct COM port4. Press the Connect button Screen should show Connecting 5. Connect the power supply to the EVM board Screen should show Connect OK!6. Select the HEX code to be programmed into the EVM board7. Press Program Device to download the program to the EVM Board.

Figure 3 Screen shot of the Bootloader program

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1.4.1.2 In Circuit Programming with Cypress PSoC MiniProg

Besides using the Bootloader, PSoC MiniProg can be used to download the code to the EVMboard.

1. The DIP switch setting would affect the PSoCMiniProg programming process.2. Power is supplied from the PSoC MiniProg3. Connect the PSoC MiniProg to the EVM boardCON3 directly.4. Run the PSoC programming software and select theport used for the connection.5. Select the device CY8C214346. Select the file by clicking on File Load button andthen selecting the file containing the hex code to beprogrammed.Click on Program button to program the device.

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1.5 Operation using monitoring application

When Project 1 code is loaded in the evaluation board, it enables the board to be connectedto a computer with a RS232 link. The Capsense Application running on the PC visualizes thestatus of switches and the slider. The messages received from the board are also displayed ina window.

Project 1 code is available on the accompanying CD at:

\Released Code\Demo Project\Project1\HexCode\Ver1_2EVT-0023-HWV2_PRJ_1_R1_2.hex

1.5.1 Using the Monitoring Application

1. Set all the DIP switches to ON.

2. Connect the RS232 cable to the Computer and EVM Board.

3. Launch the Capsense application software.

4. Select the COM Port on the PC used for communicating with the board.

5. Plug the DC Jack on the 12Vdc power adaptor into the Jack Socket labelled 2 above.

6. Press the Touch Pad and the numerical icon at the lower left corner should change colour

7. Move the finger over the slide bar, the meter and slide bar on the upper left corner shouldmove.

Figure 4 Screen shot of the monitoring application

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Detailed Description

1.6 Introduction

PSoC Capsense Evaluation Kit is a reference design, which allows users to evaluate the

capabilities of CYPRESS CY8C21434 for CapSense applications.

The Kit includes the following hardware and tools:

EVT0023 Evaluation Board

PSoC Designer

PSoC Programmer

Data Viewer

1.7 Description of EVM Board

Error: Reference source not found is a block diagram for the EVT0023 EvaluationBoard.

Figure 5 Schematic Block Diagram for the EVT-0023 board.

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PSoC

8 CapsenseButtons

CapsenseSlider

5Vregulator

8 LEDs

Buzzer

2 DigitDisplay

RS232

Potentiometer DAC

I2CProgrammingHeader

EVM Board

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The main features of the EVT0023 Evaluation Board are:1. Capsense control using PSoC CY8C21434

2. 8 Capsense buttons with LEDS to indicate the button status

3. Buzzer to provide Audio feedback of button and slider operation

4. A potentiometer to generate voltages in the range 0 to 5V

5. 1 slider bar with 2 digit 7 segment displays for indicating slider position and Potentiometervoltage.

6. Port for MiniProg Programmer and I2C interface

7. RS232 Port for connecting to PC

8. 16 pin header for providing access to additional I/O pins

1.7.1 Standalone Operation

In the standalone mode the functionality can be demonstrated without any other equipment.The status of each switch is indicated with an LED.

The position of the slider and the voltage on the potentiometer is indicated on a 2 Digit LEDdisplay.

1.7.2 Monitor by Computer

When Project 1 code is loaded in the evaluation board, it enables the board to be connectedto a computer with a RS232 link. The Capsense Application running on the PC visualizes thestatus of switches and the slider. All the data received from the board is also displayed in awindow.

1.7.3 Power Supply Infeed

The board requires 9 to 12V DC input supply to be connected to CON4. An LDO,LM78M05CDT (U4), generates the +5V rail used on the board. The converter provided withthe kit can be used for providing the DC input. The converter is rated at:

Parameter RatingInput 100 240V AC, 50/60Hz

Output 12VDC, 500mA

Table 1 Converter Rating

The 5V rail is available on connector 3 for powering external logic (300mA max).

CON3

5V Pin1

0V Pin2

Table 2 5V Bus for connecting to target board

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1.7.4 Buttons

The board includes 8 touch buttons (S1 to S8).When a button is touched, the corresponding LED is toggled to provide a visual indication ofthe button operation.

1.7.5 Testing

The slider is implemented using 5 cap sense inputs. When any button is activated, any buttonLED is ON, the slider output, in the range 0 - 20, is displayed on 2 digit seven segment LEDdisplays.

The Slider responds to finger movement on the slider. The slider output increments ordecrements depending on the finger movement. The slider output does not reflect theabsolute position of the finger on the slider.

The output increases or decreases in steps of 1 when the + or buttons are activated.

1.7.6 Buzzer

A Buzzer provides an audio indication of button and slider operation. The buzzer can bedisabled through DIP switch settings. Port P3,0 is used to drive the speaker.

1.7.7 Potentiometer

The potentiometer could be used to provide an analogue input in the range 0 to 5V. WhenSW1.4 is on, this signal is connected to P0,7. In the demo this is configured as an AnalogueInput. The voltage on this pin can be measured by the ADC.

When none of the buttons are activated, all button LEDs are OFF, the voltage on thepotentiometer viper is displayed on the 2 digit seven segment LED displays.

1.7.8 Programming Port

An I2C Programming port is provided to enable programming via MiniProg Programming unitand to interface with other target hardware.

CON3 - Programming and I2C Port

Pin Signal Description

1 +5V

2 0V

3 NC

4 SCL Serial Clock

5 SDA Serial Data

Table 3 Programming and I2C Port Signals

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1.7.9 Header

A 16 pin header is included to provide access to some of the signals for interface andmonitoring.

Header

Pin Signal Description Pin Signal Description

1 +5V 2 GND

3 TX SP3232 UART 4 TX PSoC UART

5 RX SP3232 UART 6 RX PSoC UART

7 P0,6 74HC595 - Serial Data 8 P0,0 74HC595 Output Latch

9 P0,7 10 P3,0 Buzzer

11 P1,2 74HC595 - Serial Clock 12 P3,2 Enable LEDs

13 DAC_1 Filtered DAC Out 14 P2,0 Enable Display Digit1

15 NC 16 P2,2 Enable Display Digit2

Table 4 Header Signals

1.7.10 DIP Switches

An 8 way DIP switch is provided to selectively enable / disable various functions.

Switch Signal On Off

1 RS232 transceiver TX To use with CY8C21434 Used externally from header

2 RS232 transceiver RX To use with CY8C21434 Used externally from header

3 P0,7 To use DAC output Used externally from header

4 P0,7 To read potentiometer voltage

Used externally from header

5 P3,0 To drive Buzzer Used externally from header

6 P3,2,2 To drive LEDs Used externally from header

7 P2,0 To drive display digit 1 Used externally from header

8 P2,2 To drive display digit 2 Used externally from header

Table 5 DIP Switch setting

1.7.11 RS232 Port

An RS232 port operating at 115,200 baud is used to transmit data, needed for visualisation,to the PC. A transceiver (Sipex SP3232EBEA ) is included to drive the RS232 interface.Using the Rs232 interface, the Bootloader application can be used to program the PSoCdevice.

1.7.12 Other Devices

The major devices on the board are CY8C21434 (PSoC), SP3232EBEA (RS232 transceiver),74HC595 (Serial to Parallel converter) and LM78M05CDT (LDO).

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1.8 Interfacing with a Target Board

1.8.1 Using I2C interface to connect to Target Board

Connect the SCA, SCL and GND pins on CON3 to the target.

NOTE: 4.7Kohm pull up resistors are needed on SCA and SCL on the target boardThe EVM Board 5V can be used to power the target board (300mA max.).

In this configuration, use the EVM board as an I2C Slave device and the target board as anI2C Master device.

Figure 6 Connections for connecting to Target using I2C interface

1.8.2 Using GPIO Input/Output interface to connect to Target Board

To connect the EVM Board to the target board with the GPIO pin, just hook up the P0.x, P1.x,P2.x and P3.x GPIO pin at CON2 to the external main board (10 GPIO are available). The 5Vsupply from the EVM Board can be used to power the target board ( 300mA Max).

Figure 7 Connections for connecting to target board using GPIO

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PSoC CapsenseEVM Board

Target Board

I2C Master I2C Slave

CON3

SCA

SCLGND+5V (optional)

PSoC CapsenseEVM Board

Target Board

CON2

P0.X 4 inesP1.X 2 linesP2.X 2 linesP3.X 2 lines

GP I/O

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Many of the PSoC GPIO pins are shared with some of the on board functions. Therefore,when GPIO interface is used to link with the external target board, the DIP switch setting forthe corresponding GPIO pin must be changed to :

DIP Switch (SW1) configure

Table 6 DIP switch setting for using GPIO

1.8.3 Using UART Tx/Rx interface to connect to Target Board

To connect the EVM Board to the external target board with the UART Tx/Rx pins, just hookup the UART Tx/Rx on the main target board to 2 of the GPIO pins on CON2.

In PSoC select and program the 2 GPIO pins for UART application.

Figure 8 Connections for connecting to target board using a UART

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No Pin name ON/OFF Remarks1 P1.2 Set to OFF

2 P1.4 Set to OFF

3 P0.7 Set to OFF Need to set both switch no.3and no.4 to OFF for P0.74 P0.7 Set to OFF

5 P3.0 Set to OFF

6 P3.2 Set to OFF

7 P2.0 Set to OFF

8 P2.2 Set to OFF

PSoC CapsenseEVM BoardTarget Board

CON2

Any 2 GPIO lines

GP I/OUART

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1.8.4 Using the RS232 transceiver to monitor the target board through UART

If the target board includes the PSoC Capsense circuit and touch pad then the DATAVIEWsoftware and other RS232 applications could be used to monitor the data. This is very helpfulduring the development stage.

Connect the UART Tx and Rx on the Target board to the EVM Board Tx and Rx pin at

CON2. Set the DIP Switches 1 and 2 to OFF position. The Tx and Rx pins at CON2 will belinked to the RS232 connector (CON1) through the transceiver.

Figure 9 Connections for using the RS232 interface

1.8.5 Using PSoC to generate a DC voltage for the target board:

PSoC can be used to generate a DC voltage from a filtered PWM signal. This signal can beused in applications that require a control voltage.

The signal is terminated on pin13 of CON2 and is referenced as DAC_1. When using thisfunction DIP switch 3 should be ON and DIP Switch 4 should be off. DAC output and thePotentiometer can not be used at the same time.

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UART UART RS232 RS232

TXRXGND

RS232

Target Board PSoC CapsenseEVM Board PC

CON2 CON1

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Accompanying CD

The CD accompanying the kit includes the following:

1.9 ToolsPSoC DesignerPSoC ProgrammerCSRChartMultichart

Future Capsense Application running on PC

1.10 Hardware details

SchematicBOM

PCB

1.11 Code

Target Applications Project1 and Project2Bootloader

1.12 Capsense Application Notes

The application notes ion the CD include the following:

AN2233A-Capacitive Switch Scan

AN2352 I2C-USB Bridge UsageAN2355_11_CF Capacitance Sensing - Calibrating CapSense withAN2394CapSense Best PracticesAN2397CapSense Data Viewing ToolANn2407 PC-Compatible USB CapSense Matrix KeyboardCapacitance_sensing___calibrating_capsense_with_the_csr_userCapacitance_sensing___capsense_device_and_method_selection_gCapacitance_sensing___layout_guidelines_for_psoc_capsense___

1.13 Data Sheets

The data sheets on the CD include the following:

cy8c21434_8

PSoC Technical Reference Manual

HSMH-C150sp3232ebeaLM78M05CDTHSMN-C150HSMH-C150MMBT3906LT1-D

Schematics

This section describes the PSoC Capsense Evaluation Kit hardware in detail for referencepurposes.

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Bill Of Materials for EVT 0023

Item Description Package FPN Schematic Ref Qty

1 IC, CY8C21434-24LFXI MLF32 CY8C21434-24LFI-LF U1 1

2 IC, 74HC595D SO-6 SN74HC595D-LF U3 1

3 IC, SP3232EBEA SSOP-16 SP3232EBEA-LF U2 14 IC, LM78M05CDT TO-252 LM78M05BDT-LF U4 1

5 Transistor, MMBT3904LT1 SOT-23 MMBT3906LT1-LF Q1 1

6 Transistor, MMBT3906LT1 SOT-23 MMBT3906LT1-LF Q2, Q3, Q4 3

7 LED, HSMN C151-Blue HSMX-C151 HSMN-C150-LF LED1 - LED8 88 LED, HSMH C151-Red HSMX-C151 HSMH-C150-LF LED11 1

9 Led Display, SMT 24 0.39 inch ACSA04-41SRWA-F01-LF LED9,LED10 2

10 Resistor, 47R, 5% SMD 0805 CR0805-47R0JTR-LF R21 1

11 Resistor, 470R, 5% SMD 0805 CR0805-4700JTR-LF R1-R8,R19,R20 10

12 Resistor, 1K, 5% SMD 0805 CR0805-1001JTR-LF R9,R11,R12,R13,R15,R17,R25 7

13 Resistor, 4.7K, 5% SMD 0805 CR0805-4701JTR-LF R14,R22,R24 3

14 Resistor, 10K, 5% SMD 0805 CR0805-1002JTR-LF R10,R16,R18,R23 4

15 Capacitor, 4.7nF, 20%, X7R SMD 0805 08053A472JATN-LF C2 1

16 Capacitor, 100nF, 20%, X7R SMD 0805 08055C104JATN-LF C1,C3-C5,C10,C12,C14,C14,C15 8

17 Capacitor, 1uF, 20%, X7R SMD 0805 0805YG105ZATN-LF C6-C9 4

18 Al E Cap, 100uF, 25V, -20%, +80% 6.3diax7 25V100-H-LF C11,C13 2

19 Buzzer 5V, RM=7.62mm, dia=12mm Thru Hole - BZ1 1

20 Connector, DB9/F Thru Hole D09S-RA2-C2-TG-LC-LF CON1 1

21 Connector, DCJack 2mm Jack Skt 440107-1-LF CON4 1

22 Connector, 2.54mm 8*2 Thru Hole 825440-8-LF CON2 1

23 Connector, 2.54mm 5pin Thru Hole 825433-5-LF CON3 1

24 DIP Switch, 8Way Thru Hole ADE08-LF SW1 1

25 Potentiometer, 10K Thru Hole - VR1 1

Note:Depending on availability, actual parts fitted on the boards may vary from this BOM.

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Documents

EVT0023 Manual Rev 1.0