CY8C20224-12LKXIT

Overview

The CY8C20224-12LKXIT is a CapSense PSoC device featuring an M8C CPU core with speeds up to 12 MHz. It includes 8 KB of flash program storage and 512 bytes of SRAM data storage. The device supports up to 25 capacitive buttons, one slider, and proximity sensing up to 10 cm. It offers up to 28 general-purpose I/O pins with configurable drive modes. Operating voltage ranges from 2.4 V to 5.25 V, with active current at 1.5 mA (3.0 V, 12 MHz) and sleep current at 2.8 µA (3.3 V). Internal oscillators include a ±5.0% 6 or 12 MHz main oscillator and a 32 kHz low-speed oscillator.

Feature Summary

• Configurable capacitive sensing elements supporting buttons, sliders, and proximity detection without external components.
• Integrated CapSense analog system with internal 1.8-V reference for reliable finger detection through thick acrylic.
• Flexible communication interfaces including I2C slave and SPI master-slave modules with configurable speeds.
• Low power architecture with dedicated sleep and watchdog timers for extended battery life applications.

Applications

• Capacitive touch interface for multimedia keys in notebook computers
• Proximity sensing applications requiring detection up to 10 cm
• Systems utilizing LED color mixing and configurable LED behavior for user feedback

Procurement Notes

Verify the specific package type and temperature grade corresponding to the suffix LKXIT against the official Infineon ordering information. Confirm that the component meets RoHS compliance requirements as stated in the datasheet. Ensure compatibility with the PSoC Designer development environment for firmware implementation. Check for any specific handling instructions related to the QFN package during assembly.

Selection Notes

Select this component when a single-chip solution is required for capacitive sensing combined with basic microcontroller functions. It is suitable for designs needing low external component count due to integrated oscillators and regulators. Consider the available GPIO count and memory size relative to application complexity. Evaluate the need for ISSP capabilities if field reprogramming is required.

Part Context

This part belongs to the CY8C20x24 family of CapSense PSoC devices, which integrate programmable analog and digital blocks. The family shares common architectural features such as the M8C core and CapSense hardware algorithms. Variations within the family typically differ by package pin count and available I/O resources while maintaining core functionality.

Replacement Considerations

Consult the official Infineon product transition documents for qualified replacements. Verify pin-to-pin compatibility and electrical specifications before substitution. Ensure that any alternative component supports the same CapSense configuration requirements and development tools.

FAQ

Does the CY8C20224 require external crystals for clock generation?

No, the device includes an internal main oscillator (IMO) and an internal low-speed oscillator (ILO), eliminating the need for external crystal components.

What is the maximum number of capacitive inputs supported?

The device supports up to 25 capacitive buttons, one slider, and proximity sensing capabilities.

Can the device operate in sleep mode to conserve power?

Yes, the device features a sleep mode with a specified current consumption of 2.8 µA at 3.3 V, managed by sleep and watchdog timers.