Infineon Technologies CY91F522DSBPMC-GTE1

Overview

CY91F522DSBPMC-GTE1 from Infineon Technologies (formerly Cypress) is a 32-bit FR81S automotive microcontroller with 256+64 KB program flash, 48+8 KB RAM, 80 MHz max CPU frequency, IEEE 754-compliant FPU, and integrated CAN 2.0B controllers. It operates from -40 °C to +125 °C and supports LIN 2.1, I²C, UART, CSIO, and 12-channel multi-function serial interfaces for body control modules and powertrain sensors.

For engineers reviewing the CY91F522DSBPMC-GTE1 datasheet, CY91F522DSBPMC-GTE1 pinout, CY91F522DSBPMC-GTE1 application, or CY91F522DSBPMC-GTE1 equivalent, key selection criteria include its 80 MHz FR81S RISC core, dual 12-bit ADC units (16+16 ch), 2×8-bit DACs, 56 GPIOs in LQFP-80 package, and automotive-grade ECC-protected memory subsystem.

Technical Context

The CY91F522DSBPMC-GTE1 implements a 5-stage pipelined Harvard-architecture FR81S CPU with 16×32-bit general-purpose registers, 16 priority-level interrupt controller, and built-in MPU supporting eight protection areas across privilege/user modes. Its clock system integrates PLL (1–20× multiplication), 32 kHz sub-oscillator, and 100 kHz CR oscillator with automatic failover on main/sub clock fault detection.

Peripheral integration includes three CAN 2.0B controllers (1×128-message, 2×64-message buffers), 12-channel multi-function serial interface with hardware LIN assist, 16-bit PPG timers (27 channels), and dual 12-bit successive-approximation ADCs delivering 1.4 μs conversion time across up to 32 physical channels.

Key Specifications

Pinout & Package

Package: 80-pin LQFP (LQH080), 12 × 12 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 CY91F522DSBPMC-GTE1 provides optimal balance of deterministic real-time response (12.5 ns instruction cycle), integrated LIN/CAN hardware acceleration, and compact 80-pin LQFP packaging-ideal for cost-sensitive, space-constrained automotive ECUs requiring functional safety up to ASIL-B.

Availability

CY91F522DSBPMC-GTE1 is available at Aetrix Electronics and suitable for body control modules, electric power steering systems, and transmission control units requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for CY91F522DSBPMC-GTE1 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 with over 40 years of automotive qualification expertise.

The CY91520 series was developed by Cypress (acquired by Infineon in 2020) specifically for automotive body electronics and chassis applications demanding high reliability, ECC memory, and integrated communication peripherals under AEC-Q100 stress conditions.

FAQ

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

The CY91F522DSBPMC-GTE1 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, confirmed by the FR81S core's 5-stage pipeline architecture and fixed 16-bit instruction encoding. The timing is validated across -40 °C to +125 °C ambient conditions per AEC-Q100 Grade 1 requirements.

Does this MCU support hardware LIN protocol implementation?

Yes, the CY91F522DSBPMC-GTE1 includes dedicated LIN hardware assist in its multi-function serial interface (SCI) blocks. It supports LIN 2.1 frame generation-including synch break, delimiter, and checksum-and automatic error detection for framing and overrun conditions. The hardware offloads protocol timing and state management, eliminating software overhead for LIN master/slave roles.

How many CAN message buffers are allocated per channel?

CAN channel 0 provides 128 total message buffers (transmit + receive), while channels 1 and 2 each provide 64 message buffers. This allocation is fixed in silicon and documented in the "CAN Controller" section of the datasheet (Document Number 002-04662 Rev. *I). Buffer assignment is managed by the CAN controller's message object RAM and does not require CPU intervention during message transmission or reception.

Is the internal FPU IEEE 754 compliant and what precision does it support?

Yes, the integrated FPU is fully IEEE 754-compliant and supports single-precision (32-bit) floating-point arithmetic. It features 16×32-bit floating-point registers and executes operations including add, multiply, divide, and square root with hardware rounding and exception handling. Compliance is verified per IEEE Std 754-2008 and confirmed in the "FR81S CPU Core" chapter of the official datasheet.