Infineon Technologies CY8C624AFNI-S2D43T

Overview

CY8C624AFNI-S2D43T from Infineon is a dual-core PSOC™ 62 MCU featuring a 150-MHz Arm® Cortex®-M4F and 100-MHz Cortex®-M0+ CPU, 2048-KB flash, 1024-KB SRAM, and integrated CAPSENSE™, USB FS, QSPI/XIP, and hardware cryptography. It operates from 1.7 V to 3.6 V with deep-sleep current as low as 7 µA (64-KB SRAM retention), targeting secure, ultra-low-power IoT edge nodes with local sensing, connectivity, and firmware-over-the-air (FOTA) capability.

For engineers reviewing the CY8C624AFNI-S2D43T datasheet, CY8C624AFNI-S2D43T pinout, CY8C624AFNI-S2D43T application, or CY8C624AFNI-S2D43T equivalent, key selection criteria include dual-CPU power efficiency at 0.9 V/1.1 V core voltage, on-chip DC-DC buck converter (<1 µA quiescent), 13 configurable SCBs, 32 TCPWMs, and ROM-based secured boot with eFuse-based root of trust.

Technical Context

The device implements a tightly coupled dual-CPU subsystem where the M4F handles real-time signal processing and protocol stacks while the M0+ manages low-power background tasks and peripheral control-inter-CPU communication via IPC with hardware mailbox and interrupt synchronization. Both cores share memory-mapped peripherals but operate independently with separate MPUs and DMA controllers.

Clock architecture includes two PLLs, an FLL, and multiple oscillators (IMO, ILO, crystal-supported), enabling dynamic clock scaling across six power modes. The SMIF supports XIP with on-the-fly AES decryption and 4-KB cache, while the SAR ADC delivers 2-Msps sampling with 16-channel sequencer and hardware averaging-both functional in Deep Sleep mode with comparator wake-up support.

Key Specifications

Pinout & Package

This device is housed in a 100-ball WLCSP package (ball pitch: 0.35 mm, body size: 4.0 mm × 4.0 mm), optimized for space-constrained wearable and sensor-edge applications. Ball mapping follows JEDEC MO-220 standard with dedicated power domains (VDDIO, VDDD, VDDR, VBACKUP), analog reference pins (VREF, VSSA), and high-drive GPIO groups supporting programmable slew and overvoltage tolerance.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-core secure MCU applications.

Compared with CY8C6247FMI-D52, this WLCSP variant trades pin count for minimal footprint and thermal performance in sealed enclosures; versus STM32WB55RGV, it provides true hardware separation of real-time and low-power domains plus Infineon's CAPSENSE™ and SMIF security stack-critical for certified industrial and medical edge devices.

Availability

CY8C624AFNI-S2D43T is available at Aetrix Electronics and suitable for wearable health monitors, smart home sensor hubs, industrial predictive maintenance nodes, and secure access control terminals requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for CY8C624AFNI-S2D43T 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 German semiconductor leader specializing in power management, automotive MCUs, and secure embedded solutions, with R&D centers across Europe, Asia, and the Americas.

This part belongs to the PSoC™ 62 product line-designed specifically for secure, ultra-low-power IoT endpoints requiring concurrent real-time processing, rich analog sensing, and hardware-enforced trust anchors.

FAQ

What is the maximum operating frequency of each CPU core in CY8C624AFNI-S2D43T?

The Cortex-M4F core runs at up to 150 MHz with floating-point unit and memory protection; the Cortex-M0+ core operates at up to 100 MHz with single-cycle multiply and its own MPU. Both cores support dynamic voltage scaling between 0.9 V and 1.1 V, directly affecting achievable frequency and active current draw per MHz.

Does CY8C624AFNI-S2D43T support execute-in-place (XIP) from external flash?

Yes-it features a Quad-SPI/SMIF interface that supports XIP with hardware-accelerated AES-128 decryption, 4-KB instruction cache, and octal-mode operation up to 640 Mbps. This enables secure, low-latency code execution directly from external flash without loading into internal RAM, reducing memory footprint and attack surface.

How many GPIOs are available, and what advanced I/O features do they support?

The device provides up to 102 programmable GPIOs, including two Smart I/O ports (16 pins total) capable of Boolean logic operations while the system is in Deep Sleep mode. All GPIOs support configurable drive modes, slew rates, and up to six pins are overvoltage-tolerant (up to 5.5 V), enabling direct interfacing with legacy 5-V peripherals.

Is hardware cryptographic acceleration included, and which algorithms are supported?

Yes-the integrated cryptography accelerator supports AES-128/256 (ECB/CBC/CTR/GCM), SHA-224/256, ECC-256, RSA-2048, and true random number generation (TRNG). These functions are accessible via PDL (Peripheral Driver Library) APIs and operate independently of CPU cycles, enabling secure boot, encrypted OTA updates, and authenticated sensor data pipelines.