Infineon Technologies CY91F575BHSPMC-GSE1

Overview

CY91F575BHSPMC-GSE1 from Infineon Technologies (formerly Cypress) is a 32-bit automotive-grade microcontroller featuring the FR81S RISC CPU core, 512 KB + 64 KB program flash, 40 KB main RAM + 8 KB backup RAM, and integrated CAN 2.0B (3 channels), LIN-UART (6 channels), and 40-channel 8/10-bit ADC. It operates at up to 80 MHz using a 4 MHz crystal with PLL multiplication and targets engine control units and body electronics.

For engineers reviewing the CY91F575BHSPMC-GSE1 datasheet, CY91F575BHSPMC-GSE1 pinout, CY91F575BHSPMC-GSE1 application, or CY91F575BHSPMC-GSE1 equivalent, key selection criteria include its LQFP-144 package, 5V/3.3V I/O flexibility via VCCE, hardware MPU, IEEE 754 FPU, and dual-clock supervision for ASIL-B–capable systems.

Technical Context

The CY91F575BHSPMC-GSE1 implements the FR81S CPU-a 5-stage pipelined 32-bit RISC core with 16 general-purpose registers, 16-bit fixed-length instructions, and single-cycle execution for basic ops. It integrates a Harvard architecture, built-in memory protection unit (8 configurable regions), and IEEE 754-compliant floating-point unit.

Peripherals include three C-CAN controllers (up to 1 Mbps), six LIN-UART channels compliant with LIN 2.1, four multi-protocol serial interfaces (UART/CSIO/LIN-UART/I²C), 24-channel 16-bit PPG, RTC with sub-oscillator supervision, and low-power modes (Stop, Sleep, Watch). Clocking supports main (4 MHz) and sub (32 kHz) oscillators with automatic failover to CR oscillator.

Key Specifications

Pinout & Package

This device is housed in a 144-pin LQFP (10 mm × 10 mm, 0.5 mm pitch) package with exposed thermal pad. I/O voltage level (5 V or 3.3 V) is selected per group via the VCCE power supply pin. Pin functions support multiplexed peripheral assignment including CAN, LIN, UART, CSIO, I²C, ADC, PPG, and LCD segment/common outputs.

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 TC375TA, CY91F575BHSPMC-GSE1 delivers balanced performance for ASIL-B applications with integrated FPU, dedicated WorkFlash for firmware updates, and flexible I/O voltage scaling-making it optimal for mid-tier automotive control where cost, code size, and mixed-signal integration are prioritized.

Availability

CY91F575BHSPMC-GSE1 is available at Aetrix Electronics and suitable for engine control units, body control modules, electric power steering systems, and industrial motor drives requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for CY91F575BHSPMC-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 global semiconductor leader headquartered in Munich, Germany, specializing in power management, automotive ICs, and security solutions with broad manufacturing scale and automotive qualification expertise.

This part belongs to the CY91570 series-Infineon's automotive-qualified 32-bit microcontroller family built on 90 nm CMOS, designed specifically for real-time control in powertrain, chassis, and body electronics with integrated analog peripherals and functional safety features.

FAQ

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

The CY91F575BHSPMC-GSE1 achieves a maximum operating frequency of 80 MHz using an internal PLL that multiplies a 4 MHz external crystal input by a factor of 20. This configuration delivers a minimum instruction execution time of 12.5 ns. The PLL supports multiplication factors from 1× to 20×, enabling flexible clock tree design while maintaining stability under temperature and voltage variation.

Does this MCU support functional safety standards like ISO 26262?

The CY91F575BHSPMC-GSE1 is qualified for automotive applications per AEC-Q100 Grade 1 (-40°C to +125°C) and includes hardware features supporting ASIL-B development-including a memory protection unit (MPU), dual-clock supervision with CR oscillator fallback, and lockstep-capable watchdog timers. While not ASIL-D certified out-of-box, it provides foundational mechanisms required for ASIL-B system-level compliance.

How is the 64 KB WorkFlash used in practice?

The 64 KB WorkFlash is a dedicated, wear-leveling-capable data flash region used for non-volatile storage of calibration data, runtime parameters, event logs, and firmware update images. Unlike program flash, WorkFlash supports byte-level erase and write operations with guaranteed endurance of 100,000 cycles, enabling robust over-the-air (OTA) update handling and adaptive control tuning without disrupting main application execution.

Can the LQFP-144 package pins be configured for both 5 V and 3.3 V I/O simultaneously?

Yes-via the VCCE power supply pin, which sets the I/O voltage level for three defined port groups (P010–P017, P020–P027, P030–P036). VCCE may be supplied with either 5 V or 3.3 V, allowing those pins to operate at the selected logic level. Other pins (e.g., analog, clock, power) remain fixed to their designated voltage domains and cannot be reconfigured for mixed-voltage operation.