Pin Function Grouping

flux

Done — I grouped all 21 terminals using the datasheet pin table and kept each physical pin in exactly one functional group.
Key grouping applied:
  • Power: VDD
  • Ground: GND_1, GND_2 / exposed pad
  • I2C: SCL, SDA
  • Control/Address: ADD_SEL, ~RESET, ~INT
  • GPIO/Sensors: GPIO12 and BUTTON0–BUTTON11 GPIO touch electrode pins
I also normalized the pin types to Flux-supported values like Power In, Ground, Input, Output, and Bi-Directional.
adrian95

adrian95

  • Make the functional group more general.
  • Add a Section property to all pins, and apply the same value used in the Pin Group property to each pin's Section property.

flux

I’ll simplify the pin groups to broader categories and mirror each Pin Group value into the Section property for every terminal.

flux

Done — I changed the groups to broader categories and verified every pin now has Section = Pin Group.
Applied groups:
  • Power: VDD
  • Ground: GND_1, GND_2
  • Interface: SCL, SDA
  • Control: ADD_SEL, ~RESET, ~INT
  • GPIO: GPIO12 and BUTTON0/GPIO0 through BUTTON11/DS/GPIO11
Review and document
Run ERC review
Verify package mapping
Document pin grouping
Check naming consistency
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MTCH2120-V/REB

MTCH2120-V/REB thumbnail
Touchscreen Controller 2 Wire Capacitive I2C Interface 20-VQFN (3x3) The MTCH2120-V/REB specification defines the engineering requirements for a capacitive touch sensing controller integrated circuit designed for human-machine interface applications in embedded electronic systems. This specification establishes the functional, electrical, mechanical, environmental, and quality requirements necessary to ensure accurate touch detection, stable system performance, and reliable operation across consumer, industrial, and embedded environments.
The device is intended for use in applications requiring touch-based user input such as control panels, interface buttons, and capacitive sensing surfaces. It provides robust sensing performance with immunity to noise and environmental variation, enabling reliable detection of touch events in compact and low-power electronic designs.
Engineering Requirements
The integrated circuit shall be manufactured using qualified semiconductor fabrication processes to ensure consistent sensing performance, low power consumption, and long-term operational stability. The device shall support reliable capacitive touch detection under defined electrical and environmental conditions without degradation of sensitivity or accuracy.
The sensing architecture shall provide stable touch event detection with immunity to electrical noise, environmental interference, and parasitic capacitance variations. The system shall maintain consistent performance across intended operating conditions including temperature variation and supply voltage fluctuation.
Electrical characteristics shall ensure stable digital communication, accurate sensing response, and reliable operation during startup, normal operation, and power transitions. The device shall maintain functional integrity during dynamic system conditions without false triggering or loss of sensitivity.
Mechanical and package construction shall be suitable for surface-mount assembly and shall ensure robustness during soldering, handling, and long-term operation. Workmanship shall be free from defects such as contamination, cracks, bonding issues, or structural inconsistencies that could impact electrical or mechanical reliability.
Inspection, validation, and testing shall be performed using controlled procedures and calibrated equipment to ensure compliance with all applicable engineering and quality requirements. Any deviation from this specification shall require formal engineering review, documented justification, and approval through established change control processes.
Documentation
Supporting documentation shall include official datasheets, reference design materials, electrical characterization reports, qualification data, inspection records, and revision-controlled manufacturing documentation. All documentation shall be maintained under formal configuration management and quality assurance systems to ensure traceability and consistency.
Revision Control
All modifications to this specification shall be managed through formal engineering change control procedures. Each revision shall undergo technical evaluation, validation, and approval prior to implementation to ensure continued compliance with design intent and applicable standards.
#EngineeringSpecification #CapacitiveTouch #HMI #MicrochipTechnology #EmbeddedSystems #UserInterface #SensorIC #LowPowerDesign #ElectronicsDesign #QualityAssurance #EngineeringDocumentation

Properties

MTCH2120-V/REB

Microchip Technology

Integrated Circuit

microchip.com/downloads/aemDocuments/documents/MCU08/ProductDocuments/DataSheets/MTCH2120-12CH-CapacitiveTouchControl-DataSheet-DS40002613.pdf

IC

20-VQFN

parametric-v1

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