What this PSoC 4 MCU brings to a touch-enabled control board
The CY8C4024AZI-S413T is a 32-bit ARM Cortex-M0+ MCU clocked at 24 MHz with 16 KB Flash and 2K x 8 RAM. It integrates CapSense capacitive touch sensing, LCD segment drive, and a 10-bit ADC.
CapSense and LCD drive — what the on-chip peripherals mean for BOM count
The CapSense block handles up to 36 capacitive touch channels through the same I/O pins that also serve as general-purpose GPIO, SPI, or UART — no external touch IC needed. The LCD drive supports direct segment control, which saves a display driver for simple alphanumeric panels. Brown-out detect, low-voltage detect, and a programmable watchdog timer are included, so an external supervisor IC is optional in most designs.
Memory and speed — sizing the firmware and data budget
16 KB Flash and 2 KB SRAM support a single firmware image with CapSense tuning tables and a modest protocol stack (I²C, SPI, UART).
Package and temperature grade — board fit and environment
The 48-TQFP (7x7 mm) with 36 usable I/O fits a two-layer PCB with moderate routing density. Industrial temperature range (-40 to 85 °C) covers factory-floor HMI panels, outdoor telecom gear, and appliance control boards. The 1.71 V minimum supply allows battery operation down to near-discharge levels.
Lifecycle and sourcing — active production, no LTB watch
For a BOM freeze, the risk of forced redesign from obsolescence is negligible.