Infineon Technologies CY91F524BSDPMC1-GS-ERE2

Overview

CY91F524BSDPMC1-GS-ERE2 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, and integrated CAN 2.0B controllers (3 channels, up to 1 Mbps). It features IEEE 754-compliant FPU, MPU, RTC, 12-bit ADC (48 ch), dual 8-bit DAC, and operates from -40°C to +125°C on 2.7–5.5 V supply - deployed in engine control units and body domain controllers.

For engineers reviewing the CY91F524BSDPMC1-GS-ERE2 datasheet, CY91F524BSDPMC1-GS-ERE2 pinout, CY91F524BSDPMC1-GS-ERE2 application, or CY91F524BSDPMC1-GS-ERE2 equivalent, key selection criteria include FR81S CPU compatibility, 80 MHz real-time performance, 176-pin LQFP package with sub-oscillator support, and automotive-grade functional safety readiness (TPU, ECC, LVD).

Technical Context

The CY91F524BSDPMC1-GS-ERE2 implements a 5-stage pipelined FR81S RISC core with Harvard architecture, enabling simultaneous instruction fetch and data access. It integrates a programmable SSCG clock generator supporting 4–16 MHz main oscillation, 32 kHz sub-oscillation, and PLL multiplication up to 20× for stable 80 MHz operation.

Peripheral subsystems include three independent CAN controllers with 128/64 message buffers per channel, twelve multi-function serial interfaces (UART/LIN/CSIO/I²C), and a 16-channel DMA controller with dual transfer triggers. All memory blocks feature ECC protection, and the MPU enforces eight configurable privilege-based access zones across both code and data space.

Key Specifications

Pinout & Package

Package: 176-pin LQFP (24 × 24 mm, 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 NXP S32K144 and Renesas RH850/F1L, the CY91F524BSDPMC1-GS-ERE2 provides superior deterministic timing via FR81S pipeline and built-in sub-oscillator RTC calibration, while offering FPU acceleration without external co-processors - critical for real-time motor control and sensor fusion in cost-sensitive body and powertrain modules.

Availability

CY91F524BSDPMC1-GS-ERE2 is available at Aetrix Electronics and suitable for engine control units, body control modules, electric power steering systems, and ADAS sensor hubs requiring stable component supply across extended automotive lifecycles.

Supply support for CY91F524BSDPMC1-GS-ERE2 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 AG is a German semiconductor manufacturer specializing in power management, automotive, and security solutions, with global R&D and manufacturing infrastructure.

The CY91520 series - including CY91F524BSDPMC1-GS-ERE2 - was developed by Cypress (acquired by Infineon in 2020) to address deterministic real-time control in automotive powertrain and chassis systems, emphasizing functional safety, mixed-signal integration, and long-term supply stability.

FAQ

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

The CY91F524BSDPMC1-GS-ERE2 achieves a maximum operating 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 under ideal pipeline conditions. The FR81S core's 5-stage pipeline and branch delay slot optimization ensure consistent throughput across mixed workloads including interrupt servicing and peripheral polling.

Does this MCU support sub-oscillator-based RTC calibration, and how is it implemented?

Yes, the device supports RTC calibration using the 32.768 kHz sub-oscillator. Calibration is performed by measuring the ratio between the main oscillator (e.g., 4 MHz) and sub-oscillator frequencies, then adjusting the RTC prescaler register to correct long-term drift. This function is enabled only on variants with sub-oscillator support (denoted by "S" in the part number suffix), and requires external 32 kHz crystal connection to OSC32IN/OSC32OUT pins.

How many CAN message buffers are allocated per channel, and what is the arbitration mechanism?

CAN channel 0 provides 128 message buffers (transmit/receive combined), while channels 1 and 2 each provide 64 buffers. Message arbitration uses standard CAN 2.0B identifier-based priority, with configurable acceptance filters per buffer. Buffer allocation is static at initialization; no dynamic reassignment is supported during runtime, ensuring deterministic latency for time-critical messages like torque requests or brake status.

Is the 176-pin LQFP package lead-free and RoHS-compliant, and what is its thermal resistance (θ_JA)?

Yes, the CY91F524BSDPMC1-GS-ERE2 uses a lead-free, RoHS-compliant 176-pin LQFP package (package code PMC1). Its typical junction-to-ambient thermal resistance (θ_JA) is 26.5°C/W under JEDEC-standard 2s2p board conditions (2-layer PCB, 2-inch² copper pour). For sustained 80 MHz operation at +125°C ambient, thermal design must maintain junction temperature ≤ +150°C using appropriate copper area and airflow.