Infineon Technologies CY91F522FSCPMC-GSE1

Overview

CY91F522FSCPMC-GSE1 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, integrated FPU, CAN 2.0B (3 channels), and 74 GPIOs in 100-pin LQFP package. It targets engine control units, body electronics, and ADAS domain controllers requiring ASIL-B capable timing, safety features, and real-time deterministic response.

For engineers reviewing the CY91F522FSCPMC-GSE1 datasheet, CY91F522FSCPMC-GSE1 pinout, CY91F522FSCPMC-GSE1 application, or CY91F522FSCPMC-GSE1 equivalent, key selection criteria include its 12-bit ADC (37-channel total), LIN 2.1 support, RTC with sub-clock calibration, dual-voltage LVD reset (2.8 V ±8%), and memory protection unit (MPU) with eight configurable regions.

Technical Context

The CY91F522FSCPMC-GSE1 implements the FR81S 32-bit RISC core with 5-stage pipeline, Harvard architecture, and instruction compatibility with the FR family. It integrates a hardware multiplier (signed 32-bit in 5 cycles), IEEE 754-compliant FPU, and MPU supporting privilege/user mode access control across eight memory regions.

Its peripheral set includes three independent CAN controllers (1 Mbps, 128/64-message buffers), twelve multi-function serial interfaces (UART/LIN/CSIO/I²C), a 37-channel 12-bit SAR ADC (1.4 μs conversion), two 8-bit DACs, and a real-time clock with sub-oscillator calibration via prescaler adjustment.

Key Specifications

Pinout & Package

Package: 100-pin LQFP (LQH100), 14 mm × 14 mm, 0.5 mm pitch, exposed thermal pad.

Key Features

Applications

Equivalent & Alternatives

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

Compared with RH850/F1K and S32K144, the CY91F522FSCPMC-GSE1 delivers superior analog integration (37-channel ADC, dual DAC, calibrated RTC), deterministic FR81S timing, and LIN 2.1 hardware acceleration - making it optimal for cost-sensitive, functionally safe body and chassis controllers where mixed-signal density matters more than peak CPU throughput.

Availability

CY91F522FSCPMC-GSE1 is available at Aetrix Electronics and suitable for engine control units, body control modules, and electric power steering systems requiring stable component supply, long-term automotive lifecycle support, and AEC-Q100 qualification.

Supply support for CY91F522FSCPMC-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 German semiconductor manufacturer specializing in power management, automotive MCUs, and security solutions, with global R&D and manufacturing infrastructure.

The CY91520 series belongs to Infineon's automotive FR-family microcontroller line, designed specifically for ASIL-B compliant body electronics, chassis control, and domain gateway applications demanding high analog integration and deterministic real-time performance.

FAQ

What is the maximum operating frequency and instruction cycle time of the CY91F522FSCPMC-GSE1?

The CY91F522FSCPMC-GSE1 operates at a maximum CPU frequency of 80 MHz, achieving a minimum instruction execution time of 12.5 ns. This is enabled by its on-chip PLL clock multiplication system, which can multiply a 4.0 MHz crystal input by up to 20×. The FR81S core uses a 5-stage pipeline and Harvard architecture to sustain single-cycle instruction throughput for most operations.

Does this MCU support LIN 2.1 protocol natively, and what hardware features enable it?

Yes, the CY91F522FSCPMC-GSE1 includes dedicated LIN 2.1 hardware support in its multi-function serial interface blocks. It provides synch break generation/detection, synch delimiter generation, framing error detection, and a dedicated baud rate generator adjustable via reload counter. These features offload LIN protocol timing and frame handling from the CPU, ensuring reliable communication at standard LIN bit rates (1–20 kbps).

How does the memory protection unit (MPU) function in safety-critical applications?

The MPU implements eight configurable memory protection areas with separate read/write/execute permissions for privilege and user modes. Each region can be assigned to program flash, RAM, or peripheral address space. In ASIL-B designs, this enables strict isolation between safety-critical control code (e.g., torque limiting) and non-critical tasks (e.g., diagnostics), preventing unintended memory corruption and supporting runtime verification of memory access patterns.

What are the power supply requirements and low-voltage detection capabilities?

The CY91F522FSCPMC-GSE1 requires a single 5 V supply (2.7–5.5 V range), with an internal voltage regulator generating 1.2 V for the core. It features dual low-voltage detection: one for the external 5 V rail (reset threshold 2.8 V ±8%) and another for the internal 1.2 V domain. Both LVD circuits are independently configurable and generate reset signals before functional failure occurs, meeting ISO 26262 voltage monitoring requirements.