Infineon Technologies MB91F522DSBPMC-GSE2

Overview

MB91F522DSBPMC-GSE2 from Infineon Technologies (formerly Cypress) is a 32-bit FR81S RISC microcontroller designed for automotive powertrain and body control units. It operates at up to 80 MHz, integrates 256 KB + 64 KB program flash, 48 KB main RAM + 8 KB backup RAM, IEEE 754-compliant FPU, and triple CAN 2.0B controllers supporting 1 Mbps. Used in engine control modules requiring deterministic real-time response under -40 °C to +125 °C.

For engineers reviewing the MB91F522DSBPMC-GSE2 datasheet, MB91F522DSBPMC-GSE2 pinout, MB91F522DSBPMC-GSE2 application, or MB91F522DSBPMC-GSE2 equivalent, key selection criteria include its 176-pin LQFP package, dual-voltage operation (2.7–5.5 V), hardware watchdog with configurable timeout, ECC-protected memory subsystem, and LIN 2.1 + CAN + UART/CSIO/I²C peripheral integration for automotive networked ECU design.

Technical Context

The MB91F522DSBPMC-GSE2 implements the FR81S CPU core - a 5-stage pipelined 32-bit RISC architecture with 16×32-bit general-purpose registers, 16-bit fixed-length instructions, and single-cycle execution for basic operations. It supports signed 32-bit multiplication in 5 cycles and interrupt latency of 6 cycles at 16 priority levels.

Its peripheral set includes three independent CAN controllers (128/64 message buffers per channel), a 12-bit ADC with 48 total channels (32+16), two 8-bit DACs, 12-channel multi-function serial interface (UART/CSIO/LIN/I²C), and RTC with sub-clock calibration. All operate under automotive-grade voltage supervision and temperature range (-40 °C to +125 °C).

Key Specifications

Pinout & Package

MB91F522DSBPMC-GSE2 is housed in a 176-pin LQFP (16 mm × 16 mm, 0.4 mm pitch) package with exposed thermal pad. Pin functions are defined across four I/O groups (Port A–D), CAN/LIN/UART dedicated signal banks, analog input multiplexing, and dual clock inputs (main 4–16 MHz, sub 32 kHz).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 32-bit automotive microcontroller applications.

Compared with RH850/F1L and TC375A, MB91F522DSBPMC-GSE2 offers optimal balance of FR-family software continuity, integrated WorkFlash for runtime parameter updates, LIN hardware acceleration, and proven qualification for powertrain ECU use cases below 100 MHz.

Availability

MB91F522DSBPMC-GSE2 is available at Aetrix Electronics and suitable for automotive engine control units, transmission control modules, and body control modules requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MB91F522DSBPMC-GSE2 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 manufacturing and automotive qualification expertise.

This device belongs to the CY91520 series - a family of FR81S-based 32-bit microcontrollers engineered specifically for ASIL-B automotive applications including powertrain, chassis, and body electronics where deterministic real-time performance and functional safety are critical.

FAQ

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

The MB91F522DSBPMC-GSE2 achieves a maximum operating frequency of 80 MHz using an on-chip PLL that multiplies a 4.0 MHz crystal input by 20×. This configuration delivers a 12.5 ns minimum instruction execution time. The PLL supports multiplication factors from 1× to 20× and accepts main clock inputs from 4 MHz to 16 MHz, enabling flexible clock tree design for noise-sensitive automotive environments.

Does this MCU support functional safety standards like ISO 26262?

Yes - the MB91F522DSBPMC-GSE2 includes hardware features aligned with ISO 26262 ASIL-B requirements: ECC on flash and RAM, memory protection unit (MPU) with eight configurable regions, hardware and software watchdog timers with independent clocks, CRC generator, and lockstep-capable peripherals. It is qualified for operation from −40 °C to +125 °C and supports safe startup sequences including power-on reset and low-voltage detection.

How many CAN interfaces does it have and what are their message buffer capacities?

The MB91F522DSBPMC-GSE2 integrates three independent CAN 2.0B controllers. Channel 0 provides 128 message buffers (transmit/receive combined), while Channels 1 and 2 each provide 64 message buffers. All channels support bit rates up to 1 Mbps, programmable timing quanta, error counters, and automatic retransmission. Message objects are configured via dedicated register sets for mailbox-style arbitration-free messaging.

Is there on-chip debug capability and what interface does it use?

Yes - the device includes full on-chip debug (OCD) functionality compliant with IEEE 1149.1 (JTAG). It supports real-time trace, hardware breakpoints, watchpoints, and memory inspection during active execution. Debug access is implemented via a 5-pin JTAG interface (TCK, TMS, TDI, TDO, TRST#), enabling integration with standard automotive debug tools such as Lauterbach TRACE32 and iSYSTEM winIDEA for calibration and validation workflows.