Infineon Technologies CY8C4124PVI-442

Overview

CY8C4124PVI-442 from Infineon Technologies (formerly Cypress) is a 32-bit Arm Cortex-M0 programmable system-on-chip (PSoC® 4100 family) integrating MCU, reconfigurable analog/digital blocks, 12-bit 806 ksps SAR ADC, two opamps with comparator mode, and two SCBs supporting I²C/SPI/UART. It operates from 1.71 V to 5.5 V and supports Deep Sleep mode with 20-nA current draw. Used in capacitive touch HMI, sensor signal conditioning, and low-power industrial control nodes.

For engineers reviewing the CY8C4124PVI-442 datasheet, CY8C4124PVI-442 pinout, CY8C4124PVI-442 application, or CY8C4124PVI-442 equivalent, key selection criteria include its 44-pin TQFP package, 24 MHz CPU clock, 32 kB flash / 4 kB SRAM memory map, CapSense Sigma-Delta (CSD) support with >5:1 SNR, and dual low-power comparators active in Deep Sleep.

Technical Context

The device implements an AHB-Lite bus architecture with single-layer interconnect between CPU, SRAM, flash, and peripherals. Its programmable analog subsystem includes CTBm (Capacitive Touch Block) and SAR ADC with hardware channel sequencer and signal averaging - enabling deterministic acquisition for multi-channel sensing without CPU intervention.

Digital logic is implemented via DSI (Digital System Interconnect), allowing runtime reconfiguration of TCPWM blocks (four 16-bit timer/counter/PWM units) and SCBs (two serial communication blocks). Debug uses Arm Serial Wire Debug (SWD) with four breakpoint and two watchpoint comparators, fully supported by PSoC Creator IDE.

Key Specifications

Pinout & Package

Package: 44-pin TQFP (7 mm × 7 mm, 0.8 mm pitch), RoHS-compliant, lead-free, moisture sensitivity level 3.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar programmable mixed-signal microcontroller applications.

Compared with CY8C4124PVI-442, CY8C4014LQI-422 sacrifices CapSense and memory for size reduction, while STM32F072RBT6 trades integrated analog configurability for raw processing headroom - making CY8C4124PVI-442 optimal for cost-sensitive, analog-rich embedded HMI where rapid prototyping and hardware reuse matter.

Availability

CY8C4124PVI-442 is available at Aetrix Electronics and suitable for smart home HMI, industrial sensor nodes, medical touch interfaces, and automotive interior controls requiring stable component supply across extended temperature ranges (–40 °C to +105 °C).

Supply support for CY8C4124PVI-442 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Infineon Technologies is a global semiconductor leader headquartered in Munich, Germany, delivering power systems, sensors, and microcontrollers for industrial, automotive, and IoT applications.

The PSoC® 4100 family was designed to unify programmable analog, digital logic, and Arm Cortex-M0 processing in a single chip - targeting rapid development of differentiated embedded HMI, sensing, and control systems without custom ASIC investment.

FAQ

What debug interface does CY8C4124PVI-442 support, and what tools are compatible?

CY8C4124PVI-442 uses Arm Serial Wire Debug (SWD) with four breakpoint and two watchpoint comparators. It is natively supported by PSoC Creator IDE and compatible with industry-standard tools including Segger J-Link, ARM Keil MDK, and IAR Embedded Workbench. No external debug pod or emulator is required - only SWDIO, SWCLK, and GND connections are needed for full programming and real-time debugging.

Does CY8C4124PVI-442 support true hardware-based capacitive sensing without firmware involvement?

Yes - it integrates a dedicated CapSense Sigma-Delta (CSD) block that performs charge-transfer measurement, baseline tracking, noise filtering, and finger detection autonomously. The CSD engine operates independently of the CPU, enabling continuous touch scanning during Deep Sleep (20-nA mode) and delivering >5:1 signal-to-noise ratio without firmware polling or calibration routines.

Can the SAR ADC perform automatic channel sequencing and averaging without CPU intervention?

Yes - the 12-bit SAR ADC includes a hardware channel sequencer with up to 32-step sequence and built-in signal averaging (2x–64x). This allows unattended multi-channel acquisition (e.g., temperature, voltage, current) with post-processed results stored directly to memory, freeing the Cortex-M0 for higher-level tasks and reducing interrupt load by up to 92% in sensor fusion applications.

Is the 44-pin TQFP package of CY8C4124PVI-442 pin-compatible with other PSoC 4100 variants?

No - pin mapping is specific to the 44-pin TQFP variant (PVI package). While functional blocks (e.g., SCBs, TCPWM) are architecturally consistent across the PSoC 4100 family, pin assignments for analog inputs, CapSense, and SCB signals differ between packages (e.g., 48-pin TQFP, 35-ball WLCSP). Migration requires PCB layout revision and pin configuration update in PSoC Creator.