Infineon Technologies CY8C6245FNI-S3D41T

Overview

CY8C6245FNI-S3D41T from Infineon is a dual-core Arm® Cortex®-M4F/M0+ PSOC™ 62 microcontroller with 512 KB flash, 256 KB SRAM, integrated CAN FD, USB Full-Speed, and hardware cryptography acceleration. It operates from 1.7–3.6 V, achieves 7 µA Deep Sleep current with 64 KB SRAM retention, and supports XIP from external QSPI flash at up to 320 Mbps-targeted for secure, ultra-low-power IoT edge nodes requiring real-time sensor fusion and wireless coexistence.

For engineers reviewing the CY8C6245FNI-S3D41T datasheet, CY8C6245FNI-S3D41T pinout, CY8C6245FNI-S3D41T application, or CY8C6245FNI-S3D41T equivalent, key selection criteria include dual-CPU power efficiency (22 µA/MHz @ 0.9 V on M4), on-chip DC-DC buck (<1 µA quiescent), CAN FD + USB FS concurrency, and hardware TRNG + secure boot enforcement in ROM.

Technical Context

The device implements a tightly coupled dual-CPU subsystem where the Cortex-M4F handles complex signal processing and security-critical tasks while the Cortex-M0+ manages low-power peripheral orchestration and real-time I/O control. Inter-processor communication (IPC) uses dedicated hardware mailboxes with interrupt signaling and memory-mapped shared RAM.

Its clock architecture integrates an 8-MHz IMO (±2%), 32-kHz ILO, programmable PLL/FLL, and integer/fractional peripheral dividers-enabling independent clock domains for USB, CAN FD, and TCPWMs without cross-domain jitter coupling. The SMIF controller supports on-the-fly AES-128 decryption during XIP execution.

Key Specifications

Pinout & Package

Package: 100-pin Thin Quad Flat Package (TQFP), 14 mm × 14 mm, 0.5 mm pitch, exposed thermal pad. Compatible with standard reflow profiles and automated optical inspection.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY8C6245FNI-S3D41T, the CY8C6247FMI-S4D43 trades USB FS and TQFP for compactness and extra SCBs, while the LPC55S69 offers TrustZone but requires external CAN transceivers and lacks low-power LCD driving capability.

Availability

CY8C6245FNI-S3D41T is available at Aetrix Electronics and suitable for smart home hubs, industrial sensor nodes, medical wearables, and automotive body controllers requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for CY8C6245FNI-S3D41T 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 manufacturer specializing in power management, automotive ICs, and secure microcontrollers, with global manufacturing and R&D centers.

This device belongs to the PSOC™ 62 MCU product line-designed specifically for secure, battery-operated IoT endpoints that demand concurrent wireless connectivity, real-time analog sensing, and hardware-enforced firmware integrity.

FAQ

Does CY8C6245FNI-S3D41T support secure boot from external flash?

No. Secure Boot is enforced exclusively from internal flash or ROM. The device verifies the authenticity and integrity of the boot image using hardware hashing before execution, and only allows boot from internal flash sectors marked as protected. External flash may be used for application code storage post-boot, but not for initial boot vector loading.

What is the maximum supported QSPI clock frequency for XIP operation?

The SMIF controller supports QSPI read clocks up to 80 MHz in quad mode, enabling effective throughput of 320 Mbps. This is achieved with internal 4-KB cache and on-the-fly decryption, allowing zero-wait-state execution from external flash under typical operating conditions.

Can both CPUs access the cryptography accelerator simultaneously?

No. The hardware crypto accelerator is a shared resource with arbitration logic. Requests from either CPU are serialized, and the accelerator signals completion via dedicated interrupts. Software must implement mutual exclusion or use the PSoC™ 6 HAL's crypto manager to avoid contention.

Is the 32-kHz ILO accurate enough for RTC applications without external crystal?

Yes. The internal low-speed oscillator (ILO) has ±5% accuracy over temperature and voltage, sufficient for non-precision RTC functions like calendar tracking or periodic wake-up scheduling. For time-critical applications requiring ±20 ppm accuracy, the device supports optional 32.768-kHz external crystal connection to the WCO pins.