Infineon Technologies CY91F522KWBPMC-GSE2

Overview

CY91F522KWBPMC-GSE2 from Infineon Technologies (formerly Cypress) is a 32-bit FR81S automotive microcontroller with 256+64 KB program flash, 48+8 KB RAM, 120 GPIOs, CAN 2.0B (3 channels), and IEEE 754-compliant FPU. It operates at 80 MHz using internal PLL (4 MHz input ×20), supports -40°C to +125°C, and integrates RTC, 12-bit ADC (48 ch), 8-bit DAC (2 ch), and LIN 2.1 - deployed in engine control units and body domain controllers.

For engineers reviewing the CY91F522KWBPMC-GSE2 datasheet, CY91F522KWBPMC-GSE2 pinout, CY91F522KWBPMC-GSE2 application, or CY91F522KWBPMC-GSE2 equivalent, key selection criteria include CAN channel count, sub-oscillator support, LVD configuration, flash ECC coverage, and package-specific GPIO allocation across 120-pin LQFP.

Technical Context

The CY91F522KWBPMC-GSE2 implements the FR81S 32-bit RISC core with 5-stage pipeline, Harvard architecture, and MPU-enforced privilege/user mode separation. It integrates dual A/D converters (12-bit, 48 total channels), three independent CAN controllers (1 Mbps, 128/64 message buffers), and hardware CRC generation for firmware integrity verification.

Its clock system combines main oscillator (4–16 MHz), 32 kHz sub-oscillator, 100 kHz CR oscillator, and SSCG-based spread-spectrum clocking. Power management includes Sleep/Stop/Watch/Sub RUN modes, with hardware watchdog and low-voltage detection reset (2.8 V ±8%) tied to part-number-defined enable state.

Key Specifications

Pinout & Package

Package: 120-pin LQFP (LQF0120), 0.4 mm pitch, RoHS-compliant, moisture sensitivity level 3.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SPC560P50L5 and TC377TP-64F200N, the CY91F522KWBPMC-GSE2 delivers optimal balance of FPU-enabled real-time control, 120-pin I/O density, and automotive-grade reliability at lower system cost - ideal for ASIL-B ECU designs where CAN FD is not required.

Availability

CY91F522KWBPMC-GSE2 is available at Aetrix Electronics and suitable for engine control units, body control modules, and electric power steering systems requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for CY91F522KWBPMC-GSE2 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 powertrain and chassis control applications requiring high-integrity real-time processing, functional safety features, and extended temperature operation.

FAQ

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

The CY91F522KWBPMC-GSE2 achieves 80 MHz maximum operation using its on-chip PLL with 4.0 MHz crystal input multiplied by 20. The PLL supports fine-tuning via SSCG for EMI reduction, and the minimum instruction execution time is 12.5 ns. This frequency is guaranteed across the full -40°C to +125°C temperature range with 2.7–5.5 V supply.

Does this MCU support CAN FD or only classical CAN 2.0B?

This MCU supports only classical CAN 2.0B, not CAN FD. It integrates three independent CAN controllers compliant with ISO 11898-1:2003, each supporting bit rates up to 1 Mbps. Message buffering is 128 entries for channel 0 and 64 entries for channels 1 and 2. No CAN FD protocol stack or transceiver interface enhancements are implemented.

How is flash memory protected against corruption or unauthorized access?

Flash protection includes ECC (error-correcting code) on both program and WorkFlash memory, flash security lock bits preventing read-out of protected sectors, and MPU-enforced access control. Additionally, CRC generation hardware allows runtime integrity checks of firmware images stored in flash, and TPU monitors critical timing windows to detect anomalous execution flow.

What are the key differences between CY91F522KWBPMC-GSE2 and CY91F522KWBPMC-GSE1?

The GSE2 variant includes updated initial values for sub-clock oscillator enable and low-voltage detection (LVD) circuitry compared to GSE1. Specifically, GSE2 ships with sub-oscillator enabled and external LVD enabled by default, whereas GSE1 has both disabled. These settings are factory-programmed and affect power-on behavior and RTC initialization without requiring software configuration.