Microchip Technology DM164125

Overview

DM164125 from Microchip Technology is a PICDEM™ Touch Sense 1 Development Board designed to evaluate and prototype capacitive touch sensing solutions using mTouch™ technology. It integrates two pre-programmed PIC microcontrollers (PIC16F677 for directional pad, PIC16F887 for keypad/slider), three sensor configurations (directional pad, 9-button keypad, linear slider), I²C inter-MCU communication, and on-board LEDs for real-time feedback.

For engineers reviewing the DM164125 datasheet, DM164125 pinout, DM164125 application, or DM164125 equivalent, this board serves as a complete evaluation platform for rapid development of sealed, wear-free human interface designs - especially where aesthetic flexibility, mechanical reliability, and royalty-free capacitive sensing IP are required.

Technical Context

The DM164125 implements Microchip's charge-transfer-based capacitive sensing architecture using relaxation oscillators embedded in PIC16F677 and PIC16F887 MCUs. Each MCU runs dedicated firmware that measures capacitance changes via RC decay timing, applies guard-band filtering, and computes running averages to determine touch events with configurable hysteresis and trip thresholds.

Hardware-level integration includes dual PICkit™ 2 programming headers (one per MCU), a dedicated PICkit™ Serial Analyzer I²C interface, and physical sensor layouts optimized for directional navigation, multi-button input, and analog-style slider position reporting - all accessible through the mTouch™ Diagnostic Tool's real-time gauges and charting functions.

Key Specifications

Availability

DM164125 is available at Aetrix Electronics and suitable for capacitive HMI prototyping, industrial control panel validation, consumer electronics UI testing, and embedded touch interface training requiring stable component supply and full toolchain integration.

Supply support for DM164125 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Microchip Technology Inc. is a U.S.-based semiconductor company specializing in microcontrollers, analog devices, and development tools, with ISO/TS-16949:2002 and ISO 9001:2000 certifications across design and manufacturing facilities.

The DM164125 belongs to Microchip's PICDEM™ family of demonstration and evaluation platforms, engineered specifically to accelerate adoption of mTouch™ capacitive sensing technology in cost-sensitive, mechanically robust, and aesthetically flexible user interface applications.

FAQ

What is the primary function of the DM164125 development board?

The DM164125 is a fully assembled evaluation platform for Microchip's mTouch™ capacitive sensing technology. It enables engineers to test, tune, and validate touch interface designs using three physical sensor types - directional pad, keypad, and slider - all driven by pre-programmed PIC microcontrollers and monitored via the Windows-based mTouch™ Diagnostic Tool. The DM164125 provides immediate hands-on access to raw sensor data, threshold tuning, and real-time visualization without requiring firmware development.

Does the DM164125 require external programming hardware to operate out of the box?

No - the DM164125 ships with both PIC16F677 and PIC16F887 microcontrollers factory-programmed with demonstration firmware. Users can immediately interact with all touch sensors and observe LED feedback and mTouch™ Diagnostic Tool responses. Programming hardware like the PICkit™ 2 is only needed for firmware modification or custom application development; it is not required for basic evaluation of the DM164125.

Which software tools are required to use the DM164125 effectively?

The DM164125 requires the mTouch™ Diagnostic Tool, installed from the included CD-ROM or downloaded from Microchip's website. This Windows application communicates with the board via the PICkit™ Serial Analyzer over I²C. The installation also includes the mTouch™ SDK, application notes (AN1101–AN1104), reference designs, and code modules - all essential for interpreting sensor behavior, adjusting parameters like guard band and trip level, and transitioning from evaluation to production firmware.

Can the DM164125 be used to develop production-ready touch firmware?

Yes - the DM164125 is designed as a direct bridge from evaluation to implementation. Its onboard PIC16F677 and PIC16F887 MCUs are identical to those used in commercial designs, and the mTouch™ library source code and configuration tools provided in the SDK allow full customization of sensing algorithms, calibration routines, and communication protocols. Engineers can reprogram either MCU using standard PICkit™ 2 workflows, making the DM164125 suitable for both proof-of-concept and production firmware development.

Is the DM164125 compatible with modern Windows operating systems?

The DM164125 and its mTouch™ Diagnostic Tool were originally validated for Windows XP and Vista, but remain functional on Windows 10 and 11 when using the latest PICkit™ Serial Analyzer drivers from Microchip. USB HID-class enumeration ensures plug-and-play compatibility, and the diagnostic tool's .NET Framework dependency (v2.0) is satisfied by default on supported OS versions. No legacy OS (e.g., Windows 95/98/NT) support is provided or required for current use of the DM164125.