Infineon Technologies MB91F523DWDPMC-GSE2

Overview

MB91F523DWDPMC-GSE2 from Cypress Semiconductor is a 32-bit FR81S RISC microcontroller designed for automotive control units, featuring 384 KB + 64 KB program flash, 48 KB main RAM + 8 KB backup RAM, 80 MHz max CPU frequency (12.5 ns instruction cycle), IEEE 754-compliant FPU, and integrated CAN 2.0B controllers (3 channels, up to 1 Mbps). It supports sub-oscillator-based RTC and operates from −40 °C to +125 °C.

For engineers reviewing the MB91F523DWDPMC-GSE2 datasheet, MB91F523DWDPMC-GSE2 pinout, MB91F523DWDPMC-GSE2 application, or MB91F523DWDPMC-GSE2 equivalent, key selection criteria include its 80-pin LQH080 package, dual 12-bit A/D converters (32 ch total), LIN 2.1 support across 12 serial channels, hardware watchdog with configurable timeout, and MPU-enforced memory protection for ASIL-B–capable safety firmware.

Technical Context

The MB91F523DWDPMC-GSE2 implements the FR81S core - a 5-stage pipelined 32-bit RISC architecture with Harvard memory organization, 16×32-bit general-purpose registers, and native support for signed 32-bit multiplication in 5 cycles. It integrates a clock supervisor with automatic CR oscillator fallback on sub-clock failure.

Peripheral integration includes three independent CAN controllers (128/64 message buffers per channel), dual 12-bit successive-approximation ADCs (1.4 µs conversion time), six waveform generator channels, and 56 GPIOs (with I/O relocation and 5 V-tolerant inputs on UART/LIN/I²C pins). All peripherals are accessible via dedicated register maps and support DMA-driven operation.

Key Specifications

Pinout & Package

MB91F523DWDPMC-GSE2 is housed in an 80-pin LQH080 (leadless quad flat package) with 0.5 mm pitch, 12 × 12 mm body size, and exposed thermal pad. Pin functions are defined per the official Cypress MB91520 Series datasheet Rev. *F, Section 2 (Pin Assignment) and Section 3 (Pin Description).

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 S32K144, MB91F523DWDPMC-GSE2 provides higher deterministic throughput at 80 MHz with integrated FPU and dual high-speed ADCs - making it optimal for legacy automotive platforms requiring ASIL-B compliance without architectural migration.

Availability

MB91F523DWDPMC-GSE2 is available at Aetrix Electronics and suitable for engine control units, body control modules, ADAS sensor hubs, and electric power steering systems requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MB91F523DWDPMC-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

Cypress Semiconductor (now part of Infineon Technologies) is a global leader in embedded solutions, specializing in high-reliability microcontrollers, memory, and analog ICs for automotive, industrial, and IoT markets.

The MB91520 Series was developed specifically for automotive electronic control units requiring ASIL-B functional safety, extended temperature operation, and integrated CAN/LIN/ADC peripherals - targeting cost-optimized ECU designs without sacrificing computational precision.

FAQ

What is the maximum operating frequency and instruction cycle time of the MB91F523DWDPMC-GSE2?

The MB91F523DWDPMC-GSE2 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 basic instruction, confirmed in the datasheet's Electrical Characteristics section (Page 133, Table 11-1).

Does this MCU support IEEE 754-compliant floating-point arithmetic?

Yes - the MB91F523DWDPMC-GSE2 integrates a hardware FPU compliant with IEEE 754 single-precision format, with 16×32-bit floating-point registers. It executes signed 32-bit multiplication in 5 cycles and supports full-precision addition, subtraction, and division as documented in the FR81S CPU Core section (Page 2).

How many CAN channels does MB91F523DWDPMC-GSE2 provide, and what are their message buffer configurations?

The device includes three independent CAN 2.0B controllers: Channel 0 supports 128 transmit/receive message buffers, while Channels 1 and 2 each support 64 message buffers. All channels operate up to 1 Mbps and feature dedicated message RAM with acceptance filtering, as specified in the Peripheral Functions section (Page 2).

Is the MB91F523DWDPMC-GSE2 qualified for automotive temperature grade and safety standards?

Yes - it is rated for −40 °C to +125 °C ambient operation and incorporates features required for ASIL-B compliance, including ECC on flash and RAM, MPU-based memory isolation, hardware CRC generator, and dual low-voltage detection circuits. These capabilities are validated per AEC-Q100 Grade 1 requirements.