Overview

The CY8CMBR2110 CapSense Express™ capacitive touch sensing controller saves time and money, quickly enabling a capacitive touch sensing user interface in your design. It is a register-configurable device and does not require any firmware coding or device programming. In addition, this device is enabled with Cypress’s SmartSense Auto-Tuning algorithm which eliminates the need to manually tune the user interface during development and production ramp. This speeds the time to volume and saves valuable engineering time, test time, and production yield loss.

Features

■ Register-configurable CapSense® controller

❐ Does not require firmware or device programming

❐ Ten-button solution configurable through I2C protocol

❐ Ten general purpose outputs (GPOs)

❐ GPOs are linked to CapSense buttons

❐ GPOs support direct LED drive

■ SmartSense™ Auto-Tuning

❐ Maintains optimal button performance even in noisy environment

❐ CapSense parameters dynamically set in runtime

❐ Saves time and effort in device tuning

❐ Wide parasitic capacitance (CP) range (5 pF–40 pF)

■ Advanced features

❐ Robust sensing even with closely-spaced buttons – Flanking Sensor Suppression (FSS)

❐ User-configurable LED effects

• On-system power-on

• On-button touch

• LED ON Time after button release

• Standby Mode LED Brightness

❐ Buzzer Signal Output

❐ Supports analog voltage output (requires external resistors)

❐ Attention line interrupt to host to indicate any CapSense button status change

❐ CapSense performance data through I2C interface

❐ Simplifies production-line testing and system debug

■ Noise Immunity

❐ Specifically designed for superior noise immunity to external radiated and conducted noise

❐ Low radiated noise emission

■ System diagnostics of CapSense buttons – reports faults at device power-up

❐ Button shorts

❐ Improper value of modulating capacitor (CMOD)

❐ Parasitic capacitance (CP) value out of range

■ EZ-Click™ Customizer tool

❐ Simple graphical configuration options

❐ Dynamically configures all features

❐ Configurations can be saved and reused later

■ I2C interface

❐ No clock stretching

❐ Supports speed of up to 100 kHz

■ Wide operating voltage range

❐ 1.71 V to 5.5 V – ideal for both regulated and unregulated battery applications

■ Low power consumption

❐ Supply current in run mode as low as 23 µA[1] for each button

❐ Deep sleep current: 100 nA

■ Industrial temperature range: –40 °C to +85 °C

■ 32-pin Quad Flat No-leads (QFN) package (5 mm × 5 mm × 0.6 mm)