Infineon Technologies MB91F526FSCPMC-GS-ERE2

Overview

MB91F526FSCPMC-GS-ERE2 from Infineon Technologies (formerly Cypress) is a 32-bit FR81S RISC microcontroller designed for automotive powertrain and body control units. It features an 80 MHz CPU, 1024 + 64 KB program flash, 128 KB main RAM + 8 KB backup RAM, integrated CAN 2.0B controllers (3 channels, up to 1 Mbps), and IEEE 754-compliant FPU - deployed in engine control modules requiring deterministic real-time response under -40 °C to +125 °C.

For engineers reviewing the MB91F526FSCPMC-GS-ERE2 datasheet, MB91F526FSCPMC-GS-ERE2 pinout, MB91F526FSCPMC-GS-ERE2 application, or MB91F526FSCPMC-GS-ERE2 equivalent, key selection criteria include its 100-pin LQFP package, dual 12-bit ADC (max 48 ch), LIN 2.1 support, hardware watchdog with configurable timeout, and memory protection unit (MPU) enabling ASIL-B–capable partitioning.

Technical Context

The MB91F526FSCPMC-GS-ERE2 implements the FR81S core with 5-stage pipeline, Harvard architecture, and instruction compatibility with the FR family. It integrates on-chip PLL with 1–20× multiplication, 100 kHz CR oscillator, and sub-clock (32 kHz) supervision with automatic failover to CR clock upon oscillation fault.

Peripheral integration includes three independent CAN controllers (128/64 message buffers per channel), twelve multi-function serial interfaces (UART/CSIO/LIN/I²C), six waveform generators, and a real-time clock with subclock calibration via prescaler adjustment - all operating within a single 5 V supply domain with internal 1.2 V core regulation.

Key Specifications

Pinout & Package

MB91F526FSCPMC-GS-ERE2 is housed in a 100-pin LQFP (14 mm × 14 mm, 0.5 mm pitch) package with exposed thermal pad. Pin functions are defined across four I/O port groups (P0–P3), CANH/CANL differential pairs, dedicated crystal inputs (XIN/XOUT), and multiple power/ground pins distributed for noise suppression and thermal management.

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, the MB91F526FSCPMC-GS-ERE2 delivers optimal balance of real-time performance, integrated LIN/CAN protocol engines, and ASIL-B–ready safety features in a compact 100-pin LQFP - reducing design complexity for mid-tier automotive ECUs without over-engineering.

Availability

MB91F526FSCPMC-GS-ERE2 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 MB91F526FSCPMC-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 ICs, and security solutions - with global R&D, manufacturing, and automotive qualification infrastructure.

This device belongs to the CY91520 series, a family of FR81S-based 32-bit MCUs developed originally by Cypress and now maintained by Infineon for automotive body, powertrain, and chassis control applications demanding high reliability and extended temperature operation.

FAQ

Does MB91F526FSCPMC-GS-ERE2 support CAN FD?

No. The MB91F526FSCPMC-GS-ERE2 integrates three CAN 2.0B controllers compliant with ISO 11898-1:2003, supporting bit rates up to 1 Mbps with standard and extended frame formats. It does not implement CAN FD arbitration or data-phase enhancements, nor does its peripheral documentation reference FD-specific registers or timing modes.

What debug interface does MB91F526FSCPMC-GS-ERE2 use?

The device uses On-Chip Debug (OCD) via a dedicated 5-pin JTAG/SWD-compatible interface (TCK, TMS, TDI, TDO, TRST#). It supports full-speed real-time debugging, breakpoint setting, and memory inspection without halting peripheral operation - confirmed in Section 13 of the official datasheet (Doc No. 002-04662 Rev. *I).

Is the 64 KB WorkFlash memory EEPROM-emulated?

Yes. The 64 KB WorkFlash is a dedicated sector of program flash memory configured for byte/word-level erase and write operations using Cypress's proprietary Flash API. It provides EEPROM-like functionality with 100,000 write/erase cycles and data retention exceeding 20 years at 85 °C - validated in electrical characteristics tables (Section 11).

Can MB91F526FSCPMC-GS-ERE2 operate from a 3.3 V supply?

No. The device requires a nominal 5 V supply (2.7 V to 5.5 V range) and generates its 1.2 V core voltage internally via an integrated step-down regulator. Operation below 4.5 V may compromise CAN transceiver drive strength and ADC accuracy, and the datasheet specifies 5 V as the standard operating condition for all timing and electrical parameters.