What the 24 MHz Cortex-M0+ and 16 KB flash mean for a touch-sensor node
The CY8C4024LQI-S402 runs an ARM Cortex-M0+ core at 24 MHz — enough throughput to handle CapSense scanning, LCD segment drive, and serial communication without a separate co-processor. The 16 KB flash and 2 KB RAM (2K x 8) set the firmware and data budget; a capacitive touch panel with 10-15 buttons plus I²C or SPI reporting fits comfortably, but a graphics-heavy UI or large data-logging buffer would exceed the RAM ceiling.
Peripheral set — touch, display, and wired connectivity in one chip
On-chip CapSense eliminates the need for a dedicated touch controller in human-machine interfaces. The LCD drive supports direct segment display connection, saving a display driver IC. Brown-out detect, POR, and LVD handle power-supervision without an external reset IC.
Package and board-fit — 32-QFN with exposed pad
Surface-mount reflow profile follows standard lead-free QFN guidelines; the pad is electrically connected to ground, so the board layout must not short it to other nets.
Lifecycle and supply posture
No pin-compatible second source or official successor is listed, so the BOM line is tied to this order code for the production run.