Infineon Technologies CY91F524FHCPMC-GSE1

Overview

CY91F524FHCPMC-GSE1 from Infineon Technologies (formerly Cypress) is a 32-bit FR81S automotive microcontroller with 512 KB + 64 KB program flash, 64 KB main RAM, 8 KB backup RAM, IEEE 754-compliant FPU, and integrated CAN 2.0B controllers (3 channels, up to 1 Mbps). It operates at 80 MHz using on-chip PLL (4 MHz input ×20), supports -40 °C to +125 °C, and targets engine control units and body domain controllers requiring functional safety-aware peripherals.

For engineers reviewing the CY91F524FHCPMC-GSE1 datasheet, CY91F524FHCPMC-GSE1 pinout, CY91F524FHCPMC-GSE1 application, or CY91F524FHCPMC-GSE1 equivalent, key selection criteria include its 176-pin LQFP package, dual 12-bit ADC (max 48 ch), LIN 2.1 support across 12 serial channels, RTC with subclock calibration, and hardware memory protection unit (MPU) with eight configurable regions.

Technical Context

The CY91F524FHCPMC-GSE1 implements the FR81S 32-bit RISC core with 5-stage pipeline, Harvard architecture, and instruction compatibility with the broader FR family. It integrates a 100 kHz CR oscillator, SSCG clock generator, and dual-clock supervisor for fail-safe sub-oscillator (32 kHz) monitoring with automatic CR fallback.

Peripheral integration includes three independent CAN controllers (128/64 message buffers per channel), 12-channel multi-function serial interface supporting UART/LIN/CSIO/I²C, and a 16-bit PPG subsystem with 48 channels for LED drive and waveform generation. All flash and RAM include ECC protection, and the MPU enforces privilege-mode access control across eight memory regions.

Key Specifications

Pinout & Package

Package: 176-pin LQFP (24 mm × 24 mm, 0.5 mm pitch), thermally enhanced, moisture-sensitive level 3 per J-STD-020.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 32-bit automotive microcontroller applications.

Compared with RH850/F1K and S32K144, the CY91F524FHCPMC-GSE1 provides unique subclock calibration for RTC accuracy, FR81S instruction compatibility for legacy Cypress FR-family codebases, and hardware MPU with eight regions-making it optimal for cost-sensitive ASIL-B systems where CAN FD is not mandatory but precision timing and memory isolation are.

Availability

CY91F524FHCPMC-GSE1 is available at Aetrix Electronics and suitable for engine control units, body control modules, and electric power steering systems requiring stable component supply, AEC-Q100 Grade 1 qualification, and long-term automotive lifecycle support.

Supply support for CY91F524FHCPMC-GSE1 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 security solutions, with global R&D and manufacturing infrastructure.

The CY91520 series belongs to Infineon's automotive microcontroller product line, designed specifically for ASIL-B-compliant body, chassis, and powertrain applications requiring high reliability, integrated safety features, and extended temperature operation.

FAQ

What is the maximum operating frequency and how is it achieved?

The CY91F524FHCPMC-GSE1 achieves 80 MHz maximum operation via its on-chip PLL, which multiplies a 4.0 MHz external crystal input by 20×. This yields a 12.5 ns minimum instruction execution time. The PLL supports multiplication factors from ×1 to ×20 and accepts input frequencies from 4 MHz to 16 MHz, enabling flexible clock tree design across vehicle platforms.

Does this MCU support CAN FD or only classical CAN?

The CY91F524FHCPMC-GSE1 supports only Classical CAN (CAN 2.0B) at up to 1 Mbps across three independent controllers. It does not implement CAN FD features such as flexible data-rate, extended data length, or CRC-17. For CAN FD requirements, alternative devices like the S32K144 or RH850/F1K should be evaluated.

How is the real-time clock (RTC) calibrated for long-term accuracy?

The RTC uses the 32 kHz sub-oscillator as its timebase and applies calibration by adjusting the RTC prescaler based on the ratio between the main oscillator (e.g., 4 MHz) and sub-oscillator frequencies. This correction compensates for sub-oscillator drift due to temperature and aging, achieving ±1 ppm accuracy over the full -40 °C to +125 °C range without external components.

What debug and security features are built in for automotive development?

The device includes On-Chip Debug (OCD) with Timing Protection Unit (TPU) to prevent unauthorized code execution during debugging, Flash Security registers to lock firmware against read-out, and a Key Code Register for secure boot authentication. All flash and RAM feature ECC protection, and the MPU enforces privilege-level memory access control-supporting ISO 26262 ASIL-B compliance evidence.