Infineon Technologies CY91F526LSBPMC-GSE2

Overview

CY91F526LSBPMC-GSE2 from Infineon Technologies (formerly Cypress) is a 32-bit FR81S RISC microcontroller designed for automotive-grade embedded control. It features an 80 MHz CPU, 1024+64 KB program flash, 128 KB main RAM + 8 KB backup RAM, IEEE 754-compliant FPU, and integrated CAN 2.0B controllers (3 channels, up to 1 Mbps). Used in body control modules requiring real-time sensor fusion and LIN/CAN gateway functionality.

For engineers reviewing the CY91F526LSBPMC-GSE2 datasheet, CY91F526LSBPMC-GSE2 pinout, CY91F526LSBPMC-GSE2 application, or CY91F526LSBPMC-GSE2 equivalent, key selection criteria include automotive AEC-Q100 Grade 2 qualification (-40°C to +125°C), on-chip memory protection (MPU), ECC for flash/RAM, and dual-clock supervision with CR oscillator fallback.

Technical Context

The CY91F526LSBPMC-GSE2 implements the FR81S core-a 5-stage pipelined 32-bit RISC architecture with 16×32-bit general-purpose registers, 16-bit fixed-length instructions, and hardware multiplier (signed 32-bit in 5 cycles). It supports privilege/user modes and includes an MPU with eight configurable protection areas.

Peripheral integration centers on deterministic real-time I/O: three CAN controllers (128/64 message buffers per channel), 12-channel multi-protocol serial interface (UART/LIN/CSIO/I²C), 48-channel PPG for LED/actuator timing, and dual 12-bit ADC units (up to 48 total channels, 1.4 μs conversion). Clocking uses PLL (×1–20), sub-oscillator (32 kHz), and 100 kHz CR oscillator with automatic failover.

Key Specifications

Pinout & Package

Package: 176-pin LQFP (LQD176), 24 × 24 mm, 0.5 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 RH850/F1K and S32K144, the CY91F526LSBPMC-GSE2 delivers superior mixed-signal integration-combining CAN/LIN hardware acceleration, 48-channel PPG, and on-chip WorkFlash-with deterministic real-time execution via FR81S architecture and automotive-grade reliability features.

Availability

CY91F526LSBPMC-GSE2 is available at Aetrix Electronics and suitable for automotive body electronics, chassis control systems, and infotainment gateway modules requiring stable component supply across extended product lifecycles.

Supply support for CY91F526LSBPMC-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 global semiconductor leader headquartered in Munich, Germany, specializing in power systems, automotive MCUs, and security solutions.

The CY91520 series-now part of Infineon's automotive microcontroller portfolio-was engineered specifically for cost-sensitive, high-reliability body electronics applications demanding real-time I/O flexibility, functional safety primitives, and long-term supply stability.

FAQ

What is the maximum operating frequency and corresponding instruction cycle time?

The CY91F526LSBPMC-GSE2 achieves a maximum CPU frequency of 80 MHz using its on-chip PLL with 4 MHz crystal input and ×20 multiplication. This yields a minimum instruction execution time of 12.5 ns per cycle, verified in the datasheet's electrical characteristics section (Rev. *I, Page 133). The FR81S core executes most 16-bit instructions in a single cycle due to its load/store architecture and 5-stage pipeline.

Does this MCU support LIN protocol hardware acceleration?

Yes, the CY91F526LSBPMC-GSE2 integrates dedicated LIN hardware assist across all 12 multi-function serial channels. It natively supports LIN 2.1 frame generation-including synch break/delimiter-and performs framing/overrun error detection in hardware. Each LIN channel operates with 64-step TX/RX FIFOs and a dedicated baud rate generator, eliminating software bit-banging overhead.

What are the memory protection mechanisms included?

This MCU implements a Memory Protection Unit (MPU) with eight independently configurable protection areas covering both instruction and data space. Access privileges (read/write/execute) can be set separately for user and supervisor modes. Additionally, ECC is applied to all flash (program + WorkFlash) and RAM, and the TPU (Timing Protection Unit) enforces strict timing windows for critical register writes to prevent unintended configuration changes.

Is the 100 kHz CR oscillator used only as a backup clock source?

No-the 100 kHz CR oscillator serves both as a primary clock source for low-power modes (Stop, Watch, Sub RUN) and as an automatic failover source when main or sub-oscillators are detected faulty by the clock supervisor. Its frequency accuracy is ±10% over temperature, sufficient for RTC calibration and wake-up timing but not for high-precision communication baud rates.