Infineon Technologies CY91F577BHSPMC-GSE1

Overview

CY91F577BHSPMC-GSE1 from Infineon Technologies (formerly Cypress) is a 32-bit automotive-grade microcontroller featuring the FR81S RISC CPU core, 1024 + 64 KB on-chip program flash, 64 KB main RAM, and 8 KB backup RAM. It operates at up to 80 MHz using a 4 MHz crystal with PLL multiplication, integrates dual CAN 2.0B controllers (up to 1 Mbps), 3-channel LIN-UART supporting LIN 2.1, and an 8/10-bit 40-channel ADC with 3 µs conversion time - deployed in engine control units and body electronics.

For engineers reviewing the CY91F577BHSPMC-GSE1 datasheet, CY91F577BHSPMC-GSE1 pinout, CY91F577BHSPMC-GSE1 application, or CY91F577BHSPMC-GSE1 equivalent, key selection criteria include its LQFP-144 package, 5 V/3.3 V I/O flexibility via VCCE, integrated MPU and IEEE 754 FPU, and support for sub-oscillator-based RTC with calibration - critical for functional safety–compliant automotive designs.

Technical Context

The CY91F577BHSPMC-GSE1 implements a Harvard-architecture FR81S CPU with 5-stage pipeline, 16 general-purpose 32-bit registers, and 16 priority-level interrupt controller. Its memory protection unit (MPU) defines eight configurable access regions with privilege/user mode enforcement, while the built-in IEEE 754-compliant FPU enables deterministic floating-point computation for real-time control loops.

Peripheral integration includes three C-CAN channels (64-message buffer on ch.0), four multi-function serial interfaces supporting UART/LIN/SPI/I²C, and a 24-channel 16-bit PPG for motor timing. Clock supervision uses dual oscillators (4 MHz main + 32 kHz sub) with automatic CR clock fallback upon failure - meeting ASIL-B readiness requirements in powertrain subsystems.

Key Specifications

Pinout & Package

LQFP-144 package with exposed thermal pad; 111 general-purpose I/O pins (109 when sub-oscillator enabled), including 4 I²C pseudo-open-drain ports and dedicated CAN/LIN/UART signal pins. Power supply pins include VCC5 (5 V core), VCCE (selectable 5 V/3.3 V I/O), and VSS ground planes distributed across all four sides for noise suppression.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY91F577BHSPMC-GSE1, CY91F578 offers scalable memory without hardware change, while S32K144 provides ARM ecosystem alignment and CAN FD - but sacrifices integrated motor control and LCD peripherals essential for cost-sensitive body electronics.

Availability

CY91F577BHSPMC-GSE1 is available at Aetrix Electronics and suitable for engine control units, body control modules, and transmission control units requiring stable component supply across extended automotive lifecycles (15+ years).

Supply support for CY91F577BHSPMC-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 AG is a German semiconductor manufacturer specializing in power management, automotive MCUs, and security solutions, with global R&D and manufacturing infrastructure.

The CY91570 series - including CY91F577BHSPMC-GSE1 - was developed by Cypress (acquired by Infineon in 2020) specifically for ASIL-B automotive control applications, emphasizing functional safety, mixed-signal integration, and long-term supply stability.

FAQ

What is the maximum operating temperature range for CY91F577BHSPMC-GSE1?

The CY91F577BHSPMC-GSE1 is qualified for AEC-Q100 Grade 2 operation, supporting ambient temperatures from −40 °C to +105 °C. This rating is verified per JEDEC JESD22-A108 and applies to continuous operation under specified voltage and load conditions, including all integrated peripherals such as CAN, LIN, and ADC.

Does CY91F577BHSPMC-GSE1 support CAN FD?

No, CY91F577BHSPMC-GSE1 implements Classical CAN (C-CAN) compliant with ISO 11898-1:2003, supporting bit rates up to 1 Mbps. It does not include CAN FD features such as flexible data-rate, extended data length, or CRC-17. For CAN FD capability, consider Infineon's newer AURIX™ or XMC™ families.

Can the built-in FPU be used for double-precision calculations?

No, the integrated FPU supports only single-precision (32-bit) IEEE 754 operations. It provides 16 × 32-bit floating-point registers and instructions for add, multiply, divide, and square root - sufficient for automotive control algorithms - but lacks double-precision (64-bit) arithmetic or extended precision modes.

Is external flash memory required for firmware updates?

No, CY91F577BHSPMC-GSE1 includes 64 KB of dedicated WorkFlash memory designed for safe over-the-air (OTA) firmware updates and parameter storage. Its wear-leveling support and erase/write endurance (100k cycles) allow robust field updates without external memory components.