Microchip ATSAMDA1G15B Manual de Usario

Microchip No categorizado ATSAMDA1G15B

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Atmel QTouch Library

QTouch Library Peripheral Touch Controller

USER GUIDE

Description

Atmel® QTouch® Peripheral Touch Controller (PTC) offers built-in hardware

for capacitive touch measurement on sensors that function as buttons,

sliders, and wheels. The PTC supports both mutual and self-capacitance

measurement without the need for any external component. It offers superb

sensitivity and noise tolerance, as well as self-calibration, and minimizes the

sensitivity tuning effort by the user.

The PTC is intended for autonomously performing capacitive touch sensor

measurements. The external capacitive touch sensor is typically formed on a

PCB, and the sensor electrodes are connected to the analog charge

integrator of the PTC using the device I/O pins. The PTC supports mutual

capacitance sensors organized as capacitive touch matrices in different X-Y

configurations, including Indium Tin Oxide (ITO) sensor grids. In mutual

capacitance mode, the PTC requires one pin per X-line (drive line) and one

pin per Y-line (sense line). In self-capacitance mode, the PTC requires only

one pin with a Y-line driver for each self-capacitance sensor.

Features

•Implements low-power, high-sensitivity, environmentally robust

capacitive touch buttons, sliders, and wheels

•Supports mutual capacitance and self-capacitance sensing

•Up to 32 buttons in self-capacitance mode

•Up to 256 buttons in mutual capacitance mode

•Supports lumped mode configuration

•One pin per electrode - no external components

•Load compensating charge sensing

•Parasitic capacitance compensation for mutual capacitance mode

•Adjustable gain for superior sensitivity

•Zero drift over the temperature and VDD range

•No need for temperature or VDD compensation

•Hardware noise filtering and noise signal de-synchronization for high

conducted immunity

•Atmel provided QTouch Library firmware and QTouch Composer tool

Atmel-42195M-Peripheral-Touch-Controller_User Guide-07/2016

Product Support

For assistance related to QTouch capacitive touch sensing software libraries and related issues, contact

your local Atmel sales representative or log on to myAtmel Design Support portal to submit a support

request or access a comprehensive knowledge base.

If you do not have a myAtmel account, please visit http://www.atmel.com/design-support/ to create a new

account by clicking on in the myAtmel menu at the top of the page.Create Account

When logged in, you will be able to access the knowledge base, submit new support cases from the

myAtmel page or review status of your ongoing cases.

Atmel QTouch Library Peripheral Touch Controller [USER GUIDE]

Atmel-42195M-Peripheral-Touch-Controller_User Guide-07/2016

Table of Contents

Description.......................................................................................................................1

Features.......................................................................................................................... 1

1. Development Tools ................................................................................................... 5

2. Device Variants Supported........................................................................................ 6

3. Capacitive Touch Technology.................................................................................... 8

3.1. Capacitive Touch Sensors............................................................................................................8

3.2. Capacitance Measurement Methods............................................................................................8

3.3. Self-capacitance Measurement Method.......................................................................................8

3.4. Mutual Capacitance Measurement Method..................................................................................9

3.5. Capacitive Touch Lumped Sensors..............................................................................................9

3.6. Capacitive Touch Low Power Sensor......................................................................................... 11

3.7. PTC and its Benefits...................................................................................................................13

3.8. PTC Block Diagram for Self-capacitance and Mutual Capacitance Method.............................. 13

3.9. Design Approach with PTC........................................................................................................ 15

3.10. Capacitive Touch Development Cycle........................................................................................16

4. Touch Sensor Debug and Status Information.......................................................... 17

4.1. Signal..........................................................................................................................................17

4.2. Reference...................................................................................................................................17

4.3. Delta........................................................................................................................................... 18

4.4. Touch Status & Slider/Wheel Position........................................................................................ 19

5. QTouch Library........................................................................................................ 20

5.1. Overview.....................................................................................................................................20

5.2. Library Parameters.....................................................................................................................21

5.3. Moisture Tolerance..................................................................................................................... 42

5.4. Reading Sensor States...............................................................................................................44

5.5. Application Flow......................................................................................................................... 44

5.6. API Sequence.............................................................................................................................46

5.7. State Machine.............................................................................................................................47

5.8. Operation Modes........................................................................................................................50

5.9. Touch Library API Error.............................................................................................................. 52

6. Tuning for Noise Performance.................................................................................54

6.1. Noise Sources............................................................................................................................ 54

6.2. Noise Counter Measures............................................................................................................54

7. Application Design................................................................................................... 60

7.1. Touch Library and Associated Files............................................................................................60

7.2. Code and Data Memory Considerations.................................................................................... 60

8. Example Applications.............................................................................................. 63

Especificaciones del producto

Marca:	Microchip
Categoría:	No categorizado
Modelo:	ATSAMDA1G15B
Tipo de operación:	Touch
Color del producto:	Zwart
Peso.:	50 g
Peso del embalaje:	95 g
Ancho del embalaje:	100 mm
Empaquetadura en profundidad:	40 mm
Altura del embalaje:	170 mm
Código de seguridad internacional (IP):	IPX4
Bluetooth:	Ja
Tipo de embalaje:	Hangende doos
Tiempo de reproducción de audio continuo:	4 uur
Versión Bluetooth:	5.1
Tecnología de conectividad:	True Wireless Stereo (TWS)
Banda de frecuencia:	2.402 - 2.48 GHz
Control del volumen:	Touch
Número:	1
Método de uso:	In-ear
Uso recomendado:	Oproepen/muziek
Tipo de auricular:	Stereofonisch
Impedancia:	32 Ohm
Colocar los auriculares de los altavoces.:	Intraauraal
Auriculares tipo intraaural:	Oordopjes
Rango de frecuencia de los auriculares:	20 - 20000 Hz
tipo microfoon:	Ingebouwd
Controlado por batería:	Ja
Batería/Tiempo de carga de la batería:	1.5 uur
Sensibilidad de los auriculares:	110 dB
Tiempo de espera:	90 uur
Estación de carga:	Ja
Potencia-máxima-de-entrada:	6 mW
Botones de control:	Meerdere toetsen
Capacidad de la batería del auricular derecho:	30 mAh
Capacidad de la batería del auricular izquierdo:	30 mAh
Tiempo de conversación:	4 uur
Tipo de unidad de control:	On-ear control unit
Tipo de conector estación de carga/caja de almacenamiento:	USB Type-C
Tipo de estación de carga/caja de almacenamiento:	Bedraad
Capacidad de la batería (caja de carga):	250 mAh
Altura del paquete principal (exterior):	210 mm
Ancho del embalaje principal (exterior):	400 mm
Peso bruto del embalaje principal (exterior):	5500 g
Longitud del paquete principal (exterior):	430 mm
Cantidad por caja principal (exterior):	48 stuk(s)
Peso del embalaje de envío (interior):	630 g
Tipo-producto:	Headset
Tipo de Batería:	Ingebouwde accu
Altura del paquete de envío (interior):	190 mm
Ancho del paquete de envío (interior):	110 mm
Longitud del paquete de envío (interior):	200 mm
Productos por embalaje de envío (interior):	6 stuk(s)