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ATSAMC20-QTRDEMO

更新时间：2025-07-12 19:47:14
品牌：MICROCHIP
描述：EVAL KIT FOR SAMC20 QTOUCH

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ATSAMC20-QTRDEMO 概述

EVAL KIT FOR SAMC20 QTOUCH

ATSAMC20-QTRDEMO 数据手册

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SMART ARM-based Microcontrollers  
SAM C20 QTouch Robustness Demo  
USER GUIDE  
Description  
The Atmel® | SMART SAM C20 QTouch® Robustness Demo demonstrates  
the high performance capacitive touch support of the Peripheral Touch  
Controller (PTC) while achieving best-in-class conducted immunity and  
moisture tolerance. The demo implements a robust solution that allows  
customers to easily incorporate the Atmel QTouch technology into designs  
that require a high level of noise immunity and moisture tolerance.  
Features  
•
•
•
•
•
Four self-capacitance buttons with Philipp Spring  
One self-capacitance slider using six Philipp Spring  
One seven segment LED to display slider position  
Buzzer for audio feedback  
On-board Embedded Debugger module for programming/debugging  
and QDebug data streaming  
•
Connectivity with the Atmel QTouch Analyzer  
Atmel-42525A-SAM-C20-QTouch-Robustness-Demo_User Guide-09/2015  
Table of Contents  
Description.......................................................................................................................1  
Features.......................................................................................................................... 1  
1. Overview....................................................................................................................4  
2. Hardware Description................................................................................................ 5  
2.1. Block Diagram .............................................................................................................................5  
3. Pin Configuration....................................................................................................... 6  
3.1. Self Capacitance.......................................................................................................................... 6  
3.2. Indication......................................................................................................................................6  
3.3. Communication Interface..............................................................................................................7  
4. Unit Assembly............................................................................................................8  
5. Powering Up the Kit...................................................................................................9  
6. Embedded Debugger (EDBG).................................................................................10  
7. Connecting to QTouch Analyzer.............................................................................. 12  
8. Switch Operation..................................................................................................... 14  
8.1. Noise Handling...........................................................................................................................14  
8.2. Moisture Tolerance.....................................................................................................................14  
9. Board Operation...................................................................................................... 15  
9.1. Product Layout........................................................................................................................... 15  
9.2. Lock Button.................................................................................................................................15  
9.3. Button Description......................................................................................................................15  
9.3.1.  
9.3.2.  
9.3.3.  
9.3.4.  
Minus Button................................................................................................................15  
Plus Button.................................................................................................................. 15  
Power Button............................................................................................................... 16  
Slider Sensors............................................................................................................. 16  
10. Operating Modes of the Kit......................................................................................17  
10.1. Application Flow......................................................................................................................... 17  
10.2. Normal Mode..............................................................................................................................17  
10.3. Mode Change.............................................................................................................................18  
10.4. Settings Mode.............................................................................................................................18  
10.4.1. Buzzer Volume Adjustment..........................................................................................18  
11. Schematic................................................................................................................20  
12. PCB Design.............................................................................................................22  
13. Bill of Materials........................................................................................................ 23  
Atmel SAM C20 QTouch Robustness Demo [USER GUIDE]  
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Atmel-42525A-SAM-C20-QTouch-Robustness-Demo_User Guide-09/2015  
14. Reference................................................................................................................25  
15. Revision History.......................................................................................................26  
Atmel SAM C20 QTouch Robustness Demo [USER GUIDE]  
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Atmel-42525A-SAM-C20-QTouch-Robustness-Demo_User Guide-09/2015  
1.  
Overview  
This document describes the SAM C20 QTouch Robustness demo kit. The demo kit demonstrates self  
capacitance button and slider implemented using Philipp springs. The associated package for SAM C20  
QTouch Robustness Demo contains schematics, Gerber, BoM, and firmware.  
The demo kit consists of a base board and a front panel. The front panel is mechanically fixed on the  
base board by using plastic spacers.  
The demo kit is designed to be used as a standalone unit with its own on-board microcontroller to  
evaluate the noise immunity and moisture tolerance performance. The SAM C20 QTouch Robustness  
demo kit running its associated firmware can pass Test Level 3 (10Vrms) of IEC/EN 61000-4-6  
specification for conducted immunity.  
Figure 1-1ꢀ Internal View of the Demo Kit  
Atmel SAM C20 QTouch Robustness Demo [USER GUIDE]  
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Atmel-42525A-SAM-C20-QTouch-Robustness-Demo_User Guide-09/2015  
2.  
Hardware Description  
2.1.  
Block Diagram  
Figure 2-1ꢀ Block Diagram of SAM C20 QTouch Robustness Demo Kit  
Atmel SAM C20 QTouch Robustness Demo [USER GUIDE]  
5
Atmel-42525A-SAM-C20-QTouch-Robustness-Demo_User Guide-09/2015  
3.  
Pin Configuration  
3.1.  
Self Capacitance  
The demo kit has one slider and four touch buttons, which are based on self-capacitance technology.  
There are ten Y-lines used. The slider is composed of six channels. Six individual buttons are arranged in  
the format of slider. Philipp Spring is used to bridge the air gap between the PCB and front panel. The  
Philipp Spring design is patented by Atmel and design specifications of the Philipp Springs can be  
obtained from Atmel.  
Table 3-1ꢀPin Configuration of the Self Capacitance Sensors  
FUNCTIONALITY  
MCU PIN  
MCU PIN NAME  
PA03  
Y1  
4
Y14  
Y15  
Y2  
7
PB08  
8
PB09  
9
PA04  
Y3  
10  
12  
13  
14  
47  
48  
PA05  
Y5  
PA07  
Y16  
Y17  
Y8  
PA08  
PA09  
PB02  
Y9  
PB03  
3.2.  
Indication  
This demo kit has one seven segment LED display, one buzzer for touch detection, and two LEDs to  
indicate ON/OFF status of Power and Lock buttons.  
Table 3-2ꢀPin Configuration of LEDs and Buzzer  
FUNCTIONALITY  
LEDSEG1  
LEDSEG2  
LEDSEG3  
LEDSEG4  
LEDSEG5  
LEDSEG6  
LEDSEG7  
LEDSEG8  
LEDQT1  
MCU PIN  
MCU PIN NAME  
PA16  
25  
26  
27  
28  
29  
30  
31  
32  
33  
PA17  
PA18  
PA19  
PA20  
PA21  
PA22  
PA23  
PA24  
Atmel SAM C20 QTouch Robustness Demo [USER GUIDE]  
6
Atmel-42525A-SAM-C20-QTouch-Robustness-Demo_User Guide-09/2015  
FUNCTIONALITY  
LEDQT2  
MCU PIN  
MCU PIN NAME  
PA25  
34  
20  
BUZZ-TC01  
PB11  
3.3.  
Communication Interface  
The communication pins of the Touch MCU are connected to the Data Gateway Interface (DGI) of the  
Embedded Debugger (EDBG) module through the level converter that acts as a bridge between PC and  
SAM C20 MCU. Touch data is sent by using the Bit Bang SPI mode.  
Table 3-3ꢀPin Configuration for Bit Bang SPI Commnunication Interface  
FUNCTIONALITY  
DBG_MOSI  
DBG_SCK  
MCU PIN  
MCU PIN NAME  
PA12  
21  
22  
23  
24  
PA13  
DBG_SS  
PA14  
DBG_MISO  
PA15  
Atmel SAM C20 QTouch Robustness Demo [USER GUIDE]  
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Atmel-42525A-SAM-C20-QTouch-Robustness-Demo_User Guide-09/2015  
4.  
Unit Assembly  
There are two separate units for the demo kit:  
•
•
Acrylic Front Panel  
Base PCB  
Figure 4-1ꢀ Board Stack-up  
Atmel SAM C20 QTouch Robustness Demo [USER GUIDE]  
8
Atmel-42525A-SAM-C20-QTouch-Robustness-Demo_User Guide-09/2015  
5.  
Powering Up the Kit  
The demo kit can be powered either by using USB connected to the EDBG module or by using an  
external +5V supply. There are multiple components in the kit which can handle different voltage ratings.  
The SAM C20 is working in +5V for better noise immunity. The maximum safe operating rate of the SAM  
C20 is +5.5V. The LEDs are driven at +3.3V by default to ensure optimum brightness. +3.3V for LEDs  
and other components are supplied from the regulator on the EDBG module. LED also has an option for  
+5V operation by using jumper selection.  
Atmel SAM C20 QTouch Robustness Demo [USER GUIDE]  
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Atmel-42525A-SAM-C20-QTouch-Robustness-Demo_User Guide-09/2015  
6.  
Embedded Debugger (EDBG)  
The demo kit features an on-board Embedded Debugger (EDBG) module. This can be used for  
programming and debugging the firmware using Atmel Studio. Additionally, it allows to stream touch data  
between the host PC and the kit using the Data Gateway Interface (DGI).  
Figure 6-1ꢀ EDBG on SAM C20 QTouch Robustness Demo Kit  
The EDBG is mounted on the kit as a separate module. Using the EDBG the user can connect to a  
QTouch Analyzer and view the touch data. The EDBG has been pre-configured to support a SAMC20G18  
device using SWD interface for programming and debugging. For streaming data to the QTouch Analyzer  
it uses DGI, which connects to SAM C20 over Bit Bang SPI.  
Atmel SAM C20 QTouch Robustness Demo [USER GUIDE]  
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Atmel-42525A-SAM-C20-QTouch-Robustness-Demo_User Guide-09/2015  
Figure 6-2ꢀ Connecting with EDBG for Programming using Atmel Studio  
Atmel SAM C20 QTouch Robustness Demo [USER GUIDE]  
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Atmel-42525A-SAM-C20-QTouch-Robustness-Demo_User Guide-09/2015  
7.  
Connecting to QTouch Analyzer  
Follow the steps below to connect the QTouch Anayzer to view touch data.  
1. Connect the kit to PC using an mini USB cable.  
2. Open QTouch Analyzer in Atmel Studio 6.  
3. Select QDEBUG_DGI from the drop down menu and click on Connect.  
Figure 7-1ꢀSelect QDEBUG_DGI  
4. Click OK when the DGI settings screen pops up.  
Figure 7-2ꢀDGI Settings Screen Pops Up  
5. Click Start Reading.  
Atmel SAM C20 QTouch Robustness Demo [USER GUIDE]  
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Atmel-42525A-SAM-C20-QTouch-Robustness-Demo_User Guide-09/2015  
Figure 7-3ꢀCapturing Touch Signal  
6. View the touch signal in the QTouch Analyzer.  
Figure 7-4ꢀTouch Signal View in QTouch Analyzer  
Atmel SAM C20 QTouch Robustness Demo [USER GUIDE]  
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Atmel-42525A-SAM-C20-QTouch-Robustness-Demo_User Guide-09/2015  
8.  
Switch Operation  
There are two slide switches available on the board that can be used to enable or disable the  
countermeasures in the firmware. These switches are present on the top side of the board.  
Figure 8-1ꢀ Switch Position in the Kit  
8.1.  
8.2.  
Noise Handling  
The NOISE HANDLING switch is used to enable or disable the noise countermeasures in the firmware.  
The position of the switch should be kept at ON when the demo kit is subjected to Conducted Immunity  
noise testing or powered from noisy power supply.  
There is a beep sound when the switch is moved from ON to OFF or vice versa.  
Moisture Tolerance  
The MOISTURE TOLERANCE switch is provided to enable or disable the moisture tolerance  
countermeasures in the firmware. The firmware is designed to detect the presence of moisture and lock  
the sensors to prevent false detects.  
There is a beep sound when the switch is moved from ON to OFF or vice versa.  
Note:ꢀ Touch on multiple sensors simultaneously is not supported when this switch is in ON position.  
Atmel SAM C20 QTouch Robustness Demo [USER GUIDE]  
14  
Atmel-42525A-SAM-C20-QTouch-Robustness-Demo_User Guide-09/2015  
9.  
Board Operation  
9.1.  
Product Layout  
Figure 9-1ꢀ Layout of Sensors on the Kit  
9.2.  
Lock Button  
The lock button is used to enable or disable all other touch sensors in the kit. While lock is enabled, the  
other sensors will not respond to touch.  
The LED for lock the button will remain glowing to indicate the locked state of the touch panel. Touching  
the Lock button in lock state will release the lock and the LED will turn OFF.  
There is a long beep when the button detection put the panel in locked state and there will be a short  
beep when the panel is released from the lock state.  
9.3.  
Button Description  
9.3.1.  
Minus Button  
This minus button is used to decrement the slider position and the value will be displayed on the seven  
segment LED display. A single tap on the button decrements the displayed position value by one count.  
Continuous touch on the minus button will decrement the position value one by one until it reaches the  
minimum value as “0”.  
9.3.2.  
Plus Button  
This plus button is used to increment the slider position and the value will be displayed on the seven  
segment LED display. A single tap on the button increments the displayed position value by one count.  
Continuous touch on the plus button will increment the position value one by one until reach of the  
maximum value as “b”.  
Atmel SAM C20 QTouch Robustness Demo [USER GUIDE]  
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Atmel-42525A-SAM-C20-QTouch-Robustness-Demo_User Guide-09/2015  
9.3.3.  
Power Button  
The power button is used to turn the panel ON or OFF  
The LED for power button will remain glowing to indicate the ON state of the touch panel. The seven  
segment LED display shows zero when the power button is in ON state. Touching the power button again,  
the touch panel will be put to OFF state and the LED will stop glowing.  
There is a long beep when the button in OFF state comes into detect and the touch panel is activated. A  
short beep is made when the button comes in to detect in ON state and the touch panel is deactivated.  
9.3.4.  
Slider Sensors  
The slider is made of six individual self-capacitance button sensors and is interpreted as a low resolution  
slider in the application. The number of positions reported is 11; from 0 to 9, and b. The reported position  
in the application will be displayed on the seven segment LED display.  
Atmel SAM C20 QTouch Robustness Demo [USER GUIDE]  
16  
Atmel-42525A-SAM-C20-QTouch-Robustness-Demo_User Guide-09/2015  
10.  
Operating Modes of the Kit  
10.1. Application Flow  
Figure 10-1ꢀ Top Level Application Flowchart of SAM C20 QTouch Robustness Demo Firmware  
10.2. Normal Mode  
In this mode all sensors are operational. For every valid touch there is a short beep. If you touch the slider  
the corresponding position will display on the seven segment LED display. The slider position can also be  
changed by touching the plus or minus button.  
Atmel SAM C20 QTouch Robustness Demo [USER GUIDE]  
17  
Atmel-42525A-SAM-C20-QTouch-Robustness-Demo_User Guide-09/2015  
10.3. Mode Change  
To change the application mode, press and hold both the plus and the minus buttons for one second. This  
will change the mode to Settings mode if the current mode is Normal and vice versa.  
Note:ꢀ If the kit is left in Settings mode for more than ten seconds, it will automatically switch to Normal  
mode.  
10.4. Settings Mode  
10.4.1. Buzzer Volume Adjustment  
Following are the steps to adjust the volume of the buzzer. Ensure that you are in Settings mode.  
•
•
•
Press and hold both the plus and the minus button for one second. A beep will indicate that you  
have entered into Settings mode.  
The LED segment display will indicate the corresponding digit of the current volume setting. Adjust  
the volume level by using the slider. The buzzer sound is audible as long as the slider is touched.  
Press and hold the plus and the minus button for one second. This will save the buzzer volume  
level.  
Note:ꢀ The buzzer volume is saved into the NVM. The volume setting is retained in the memory even  
after power cycle. The buzzer volume is to be manually set; there is no provision for automatic reset of  
buzzer volume.  
Atmel SAM C20 QTouch Robustness Demo [USER GUIDE]  
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Atmel-42525A-SAM-C20-QTouch-Robustness-Demo_User Guide-09/2015  
Figure 10-2ꢀ Application Flow for the Settings Mode  
Atmel SAM C20 QTouch Robustness Demo [USER GUIDE]  
19  
Atmel-42525A-SAM-C20-QTouch-Robustness-Demo_User Guide-09/2015  
11.  
Schematic  
Figure 11-1ꢀMCU and Sensor Configuration Section  
Atmel SAM C20 QTouch Robustness Demo [USER GUIDE]  
20  
Atmel-42525A-SAM-C20-QTouch-Robustness-Demo_User Guide-09/2015  
Figure 11-2ꢀLED Segment, Buzzer, and Switch Section  
Figure 11-3ꢀEDBG Headers and Connectors  
Atmel SAM C20 QTouch Robustness Demo [USER GUIDE]  
21  
Atmel-42525A-SAM-C20-QTouch-Robustness-Demo_User Guide-09/2015  
12.  
PCB Design  
Figure 12-1ꢀTop Layer  
Figure 12-2ꢀBottom Layer  
Atmel SAM C20 QTouch Robustness Demo [USER GUIDE]  
22  
Atmel-42525A-SAM-C20-QTouch-Robustness-Demo_User Guide-09/2015  
13.  
Bill of Materials  
Table 13-1ꢀTop Level Bill of Materials  
COMPONENT  
QUANTITY  
Acrylic Front Panel  
1
1
1
4
6
6
SAM C20 QTouch Robustness Demo Base Board - PCBA  
Atmel EDBG-PCBA  
(Rubber Feet) Bump-on  
Plastic Spacers 11.8mm  
Nylon Screw 4.3mm  
Table 13-2ꢀBill of Material for the Base Board  
Designator  
Quantity Value  
Description  
C107, C109, C112, C113  
C108, C110  
4
2
7
1μF  
SMD Capacitor 0603  
SMD Capacitor 0603  
SMD Capacitor 0603  
4.7μF  
100nF  
C111, C121, C302, C303,  
C304, C305, C307  
C114, C116, C117, C119  
C115, C118  
4
100nF  
1μF  
SMD Capacitor 0402  
SMD Capacitor 0402  
SMD Capacitor 0603  
SMD Capacitor 0603  
2
C120, C301  
2
10μF  
10nF  
C201, C202, C203, C204,  
C205, C206, C207, C208,  
C209, C210  
10  
D101  
1
2
4
1
1
1
1
1
2
EL17-21UYC/A3  
C513A-WSS-CV0Y0151  
SJ-5303  
Yellow LED SMD 0805  
5mm White LED_TH  
D205, D206  
E1, E2, E3, E4  
J101  
Adhesive feet, diam. 11.1mm  
Atmel Generic EDBG module  
Right Angle Header 2x5  
Right Angle Header 2x5  
Right Angle Header 1x3  
Right Angle Header 1x2  
EDBG module  
J102  
RT Pin Header 2X5  
RT Pin Header 2X5  
RT Pin Header 1X3  
Pin header 1x2 right angle  
SNT-100-BK-G  
J103  
J105  
J300  
JS2, JS301  
Jumper cap for 2.54mm  
pinheader  
KEY101, KEY102, KEY103, 10  
KEY104, KEY105, KEY106,  
KEY107, KEY109, KEY110,  
KEY114  
Philipp Spring  
Spring for touch applications  
Atmel SAM C20 QTouch Robustness Demo [USER GUIDE]  
23  
Atmel-42525A-SAM-C20-QTouch-Robustness-Demo_User Guide-09/2015  
Designator  
L1, L101  
LED201  
Quantity Value  
Description  
2
1
BLM18PG471SN1  
SMD RF inductor 0603  
HDSP-H151  
LED 7-SEG, Red, Common  
Anode  
LS1  
1
1
ABT-402-RC  
Buzzer  
PCB1  
SAMC20 QTR Demo Base SAMC20 QTR Demo Base  
Board PCB Documentation Board PCB Documentation  
Q18, Q211, Q212  
3
BC847W  
2N7002DW  
1kΩ  
NPN SMD BJT transistor  
Dual N-Channel MOSFET  
SMD Resistor 0603  
Q200, Q201, Q202, Q203  
4
R101, R102, R219, R301,  
R302, R303, R304, R305,  
R306, R307, R309, R310,  
R314  
13  
R103  
1
4.7kΩ  
330Ω  
0Ω  
SMD Resistor 0603  
SMD Resistor 0603  
SMD Resistor 0402  
R104, R105, R221, R222  
4
R106, R108, R225, R226,  
R227, R228, R229, R230,  
R231, R232  
10  
R107, R109  
2
8
100kΩ  
1MΩ  
SMD Resistor 0402  
SMD Resistor 0402  
R200, R201, R202, R203,  
R204, R205, R206, R207  
R208, R209, R214, R215,  
R216, R217, R223, R224  
8
330Ω  
SMD Resistor 0402  
R210, R211, R218  
R212, R213, R220  
SW1, SW2  
3
3
2
1
2
1
510Ω  
SMD Resistor 0402  
SMD Resistor 0603  
Slide Switch  
10kΩ  
SPDT  
SW101  
KMS223GPLFG  
TXS0104ERGYR  
SAMC20G18A-AN  
SMT Side Actuator  
Voltage Level Translator  
MCU  
U101, U102  
U300  
Atmel SAM C20 QTouch Robustness Demo [USER GUIDE]  
24  
Atmel-42525A-SAM-C20-QTouch-Robustness-Demo_User Guide-09/2015  
14.  
Reference  
[1]. QTAN0079: Buttons, Sliders and Wheels, Touch Sensor Design Guide - http://www.atmel.com/  
Images/doc10752.pdf  
[2]. SAM D Peripheral Touch Controller User Guide - http://www.atmel.com/Images/Atmel-42195-QTouch-  
General-Library-Peripheral-Touch-Controller_User-Guide.pdf  
[3]. AT09363: PTC Robustness Design Guide, application note - http://www.atmel.com/images/  
atmel-42360-ptc-robustness-design-guide_applicationnote_at09363.pdf  
Atmel SAM C20 QTouch Robustness Demo [USER GUIDE]  
25  
Atmel-42525A-SAM-C20-QTouch-Robustness-Demo_User Guide-09/2015  
15.  
Revision History  
Doc Rev.  
Date  
Comments  
42525A  
09/2015  
Initial document release.  
Atmel SAM C20 QTouch Robustness Demo [USER GUIDE]  
26  
Atmel-42525A-SAM-C20-QTouch-Robustness-Demo_User Guide-09/2015  
Atmel Corporation  
1600 Technology Drive, San Jose, CA 95110 USA  
T: (+1)(408) 441.0311  
F: (+1)(408) 436.4200  
|
www.atmel.com  
©
2015 Atmel Corporation. / Rev.: Atmel-42525A-SAM-C20-QTouch-Robustness-Demo_User Guide-09/2015  
Atmel®, Atmel logo and combinations thereof, Enabling Unlimited Possibilities®, QTouch® and others are registered trademarks or trademarks of Atmel Corporation in  
U.S. and other countries. ARM®, ARM Connected® logo, and others are the registered trademarks or trademarks of ARM Ltd. Other terms and product names may  
be trademarks of others.  
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intellectual property right is granted by this document or in connection with the sale of Atmel products. EXCEPT AS SET FORTH IN THE ATMEL TERMS AND  
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SAFETY-CRITICAL, MILITARY, AND AUTOMOTIVE APPLICATIONS DISCLAIMER: Atmel products are not designed for and will not be used in connection with any  
applications where the failure of such products would reasonably be expected to result in significant personal injury or death (“Safety-Critical Applications”) without  
an Atmel officer's specific written consent. Safety-Critical Applications include, without limitation, life support devices and systems, equipment or systems for the  
operation of nuclear facilities and weapons systems. Atmel products are not designed nor intended for use in military or aerospace applications or environments  
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ATSAMC20E15A-MN MICROCHIP 32-bit ARM Cortex-M0 5V Support, CAN-FD, PTC and Advanced Analog 获取价格
ATSAMC20E15A-MNT MICROCHIP 32-bit ARM Cortex-M0 5V Support, CAN-FD, PTC and Advanced Analog 获取价格
ATSAMC20E15A-MU MICROCHIP 32-bit ARM Cortex-M0 5V Support, CAN-FD, PTC and Advanced Analog 获取价格
ATSAMC20E15A-MUT MICROCHIP 32-bit ARM Cortex-M0 5V Support, CAN-FD, PTC and Advanced Analog 获取价格

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