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Capacitive Touch Sensing With dsPIC33 DSCs
Comprehensive Solutions for Touch Sensing
Why Choose Our dsPIC33 DSCs for Your Touch Project?
- Touch Features
- ISO 26262 Functional Safety
- Use Cases
- Self-sensing
- Mutual sensing*
- Driven Shield and Driven Shield+ modes for state-of-the-art water tolerance
- Ready-to-use touch libraries in MPLAB® Code Configurator (MCC)
- ASIL-B and ASPICE-compliant safety touch library packages
- ISO 26262 and IEC 61508 functional safety packages for DSCs
- Boost mode to increase sensing speed and/or increase SNR*
- Automotive qualified for silicon, robustness, noise sustainability and emissions
*Contact Microchip Sales
We offer ISO 26262 Functional Safety Touch packages for core-independent touch DSCs to enable you to develop automotive safety-compliant touch applications. Below are the highlights of our ISO 26262 Functional Safety Touch packages*:
- ASIL-B and ASPICE L1-compliant functional safety touch library
- Functional Safety Manual
- Functional safety touch reference application with user’s guide
- Functional safety library integration guide
- Statis and dynamic code reports (Advanced package)
- Safety analysis reports
*Functional Safety packages for diagnostics for the dsPIC33C DSCs must be purchased separately.
Leverage our MCC Touch Library to integrate touch features and address a variety of use cases, including:
- Buttons, sliders and wheels (out of the box from MCC)
- Level sensing
- Hands-Off Detection (HOD) with or without heating
- Proximity sensing
- Touchpads with surface gestures
Key Touch Features
Integrated Touch Controller (ITC) on dsPIC33A DSCs
The ITC is a hardware engine that executes the command sequences on the sensor inputs.
- A flexible and fully independent hardware engine for Capacitive Voltage Divider (CVD) measurements
- Out-of-the-box hardcoded touch sequences for beginners
- User-defined custom capacitive sensing sequence for advanced innovative designs
- Configurable capacitor array for obtaining maximum touch sensitivity
- Wide range of touch-triggering sources
- Up to 64 conversion records and up to three conversion lists
Peripheral Trigger Generator (PTG) on dsPIC33C DSCs
The PTG is a user-programmable sequencer automating CVD sequencing and measurements.
- It coordinates with Analog-to-Digital Converter (ADC) via Direct Memory Access (DMA) to execute the touch sample acquisition stage without CPU intervention
- Step queue with 32 entries to store step commands
Video
dsPIC33 DSCs: Your Solution to Overcome Various Touch-Sensing Challenges
Learn how our dsPIC33 Digital Signal Controllers (DSCs) with core-independent touch address the challenges of implementing robust capacitive touch-sensing designs in automotive and industrial applications that require precision touch, faster response, robustness, functional safety and security.
Getting Started With Capacitive Touch Sensing Designs Has Never Been Easier
Documentation
Tools and Software
- Demo & Evaluation Boards
- Development Environment
The Curiosity Platform Development Board (EV74H48A) is a full-featured development and demonstration platform enabling customers to explore the capabilities of the dsPIC33A Digital Signal Controller (DSC) family and also the PIC32A MCU family. The board operation requires the insertion of a 120-pin General Purpose Dual In-Line Module (DIM) containing a dsPIC33A DSC device or a PIC32A MCU device.
This board simplifies the evaluation of capacitive touch sensing using the dsPIC33C DSCs with core-independent touch capability or the device’s usage in automotive and industrial applications requiring CAN-FD, LIN or SENT communication. This board has on-board touch buttons, CAN/CAN FD, LIN and SENT transceivers, along with XPLAINED PRO and mikroBUS™ connectors to interface touch and other extension boards
The dsPIC33CK64MC105 Curiosity Nano Evaluation Kit is a cost-effective hardware platform to evaluate the dsPIC33CK family of high-performance Digital Signal Controllers (DSCs). The board features the 100 MHz dsPIC33CK64MC105 DSC, which offers 64KB of ECC Flash, 8KB of RAM, a 12-bit/3.5 Msps ADC with 15 channels, 3 op amps, 1 analog comparator, a 12-bit DAC, 4x2 high-speed PWMs with 2 ns resolution and several Core Independent Peripherals (CIPs). The dsPIC33CK ‘MC1’ family is ideal for the design of automotive, motor control, sensor interfacing and control, high-performance, functional safety, and robust applications.
The Microchip Curiosity Nano Touch Adapter is a hardware extension platform to ease the connection between Curiosity Nano kits and Xplained Pro touch extension boards.
The Curiosity Nano Touch Adapter bridges from the Curiosity Nano MCU kits to the XPRO connected touch extension boards.
Its similar in purpose as the Curiosity Nano Base for Click boards™ (AC164162) yet focused on touch extension boards.
Microchip® QT7 Xplained Pro kit is an extension board that enables the evaluation of self-capacitance touch.
Microchip QT8 Xplained Pro kit is an extension board that enables easy evaluation of the 2D Touch Surface library.
Microchip T9 Xplained Pro kit is an extension board that enables easy evaluation of touch on metal (MoC).
The Build In Self-Test (BIST) Xplained Pro extension kit (BIST-XPRO) allows to introduces pin failures for Built in self sets and/or Power up self tests (POST). Its a daughter board compatible with the
Xplained Pro and Curiosity platforms.
The BIST-XPRO adds to ability to introduce pin failures in early stage of development. Pin failures are in focus in all types of functional safety relevant projects such as:
- ISO26262 (ASIL) for Automotive
- IEC60730 for Appliances
- IEC 61508 (SIL) for Industrial
- IEC 62304 for Medical
The board connects between compatible XPRO MCU boards or to Curiosity Nano MCU boards via the Curiosity Nano Touch Adapter and extension sensor boards, such as the QT7-XPRO. The BIST-XPRO enables quick testing of the BIST and Power-up Self-Test (POST) routines for their effectiveness to test common pin failures, such as:
- Pin short to VDD
- Pin short to VSS / GND
- Pin short to another pin
- Pin open (e.g. broken sensor feeding line)
MPLAB X IDE is a highly configurable software platform that provides powerful, free tools for developing, debugging and qualifying embedded designs that use microcontrollers and digital signal controllers.
MPLAB Code Configurator supports 8-bit, 16-bit and 32-bit PIC® microcontrollers. MCC is incorporated into both the downloadable MPLAB X Integrated Development Environment (IDE) and the cloud-based MPLAB Xpress IDE.
The MPLAB XC-DSC C Compiler is a full-featured, optimizing compiler that translates standard ANSI C programs into Digital Signal Controller (DSC) device assembly language sources. This compiler also supports many command-line options and language extensions that allow full access to the DSC device hardware capabilities and gives users fine control of the compiler code generator.
Design Resources
MPLAB® Discover
The MPLAB Discover content search platform is a catalog of fully configured and complete source code, projects, examples, reference designs, data sheets, videos, software applications and more to help jump-start your next project.
MPLAB® Data Visualizer
MPLAB® Data Visualizer is a free debugging tool that graphically displays run-time variables in an embedded application.
Automotive Electronic Control Unit (ECU) Demonstration Application
This demo application showcases the use of high-performance, real-time dsPIC33C DSCs to meet the security and AUTOSAR® requirements and implement a variety of automotive ECU functions.
