NXP Semiconductors MC908GZ32MFUE

Overview

MC908GZ32MFUE from Freescale Semiconductor is an 8-bit HCS08-core microcontroller with 32 KB on-chip Flash memory, 1.5 KB RAM, and integrated peripherals including ADC (10-bit, 24-channel), MSCAN08 controller, ESCI, SPI, two TIM modules, and a PLL-based Clock Generator Module. It operates at up to 40 MHz bus frequency and targets automotive body electronics, industrial sensor nodes, and low-power embedded control applications.

For engineers reviewing the MC908GZ32MFUE datasheet, MC908GZ32MFUE pinout, MC908GZ32MFUE application, or MC908GZ32MFUE equivalent, this page delivers verified technical context, package-validated pin functions, real-world use cases in CAN-based vehicle subsystems and analog-sensing systems, and two confirmed alternative parts with documented functional and packaging differences.

Technical Context

The MC908GZ32MFUE implements the HCS08 CPU core with enhanced addressing modes and a 16-bit index register, supporting both single-cycle and multi-cycle instructions. Its Clock Generator Module integrates a crystal oscillator, PLL with programmable multiplier (×1–×32), and automatic acquisition/lock logic for stable clock synthesis across temperature and voltage.

It features dual Flash memory blocks (FLASH-1 and FLASH-2) with independent block protection, enabling safe in-field firmware updates. The MSCAN08 module complies with ISO 11898-1 (CAN 2.0A/B) and supports message buffering, priority arbitration, and error confinement-critical for automotive networked control.

Key Specifications

Pinout & Package

MC908GZ32MFUE is housed in a 64-pin LQFP (Low-Profile Quad Flat Package) with 0.5 mm pitch, JEDEC MS-026 compliant, and marked "MFUE" per Freescale's device numbering system (Appendix B, Rev. 6).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC908GZ48MFUE, the MC908GZ32MFUE offers reduced Flash capacity but identical peripheral functionality and footprint-ideal for cost-sensitive volume production. Versus S9KEAZ128AMLH, it provides proven automotive qualification and simpler toolchain support, though without CAN FD or 32-bit performance headroom.

Availability

MC908GZ32MFUE is available at Aetrix Electronics and suitable for automotive body control units, industrial sensor interfaces, HVAC actuators, and medical pump controllers requiring stable component supply across extended product lifecycles.

Supply support for MC908GZ32MFUE 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

Freescale Semiconductor (now part of NXP Semiconductors since 2015) pioneered HCS08 architecture for cost-effective, high-reliability microcontrollers in automotive and industrial markets.

The MC68HC908GZxx family was designed specifically for CAN-based distributed control systems requiring robust Flash reliability, wide temperature operation, and integrated analog/mixed-signal capability.

FAQ

What is the maximum bus frequency supported by the MC908GZ32MFUE?

The MC908GZ32MFUE achieves a maximum bus frequency of 40 MHz using its internal PLL, which can multiply the crystal input (1–8 MHz) by factors from ×1 to ×32. This allows flexible clock scaling while maintaining low EMI through programmable PLL bandwidth control. The actual achievable frequency depends on VDD and temperature, with full specification guaranteed at 2.7–5.5 V and –40 °C to +125 °C.

Does the MC908GZ32MFUE support in-application programming (IAP) of Flash memory?

Yes, the MC908GZ32MFUE supports in-application programming via its FLASH-1 and FLASH-2 control registers. Firmware can erase and program Flash pages (512 bytes) or perform mass erase while executing from RAM or the other Flash block. This enables secure over-the-air updates and bootloader implementations without external programming hardware.

How many CAN message buffers does the MSCAN08 module in the MC908GZ32MFUE provide?

The MSCAN08 module in the MC908GZ32MFUE provides 15 individually configurable message buffers. Each buffer supports full CAN 2.0B identifier (29-bit), programmable acceptance filtering, and dedicated control/status registers-allowing concurrent reception and transmission of multiple prioritized messages without CPU polling overhead.

Is the MC908GZ32MFUE qualified for automotive applications?

Yes, the MC908GZ32MFUE is AEC-Q100 Grade 1 qualified (–40 °C to +125 °C), with built-in features such as low-voltage inhibit (LVI), COP watchdog, and flash ECC-like protection logic. It meets automotive requirements for ESD immunity (±2 kV HBM), latch-up robustness, and long-term reliability in engine bay and chassis-mounted modules.

What debug interface does the MC908GZ32MFUE use?

The MC908GZ32MFUE uses the Background Debug Mode (BDM) interface via a single-wire connection (BKGD pin), compatible with Freescale's DEMO908GZ60 evaluation board and third-party BDM debuggers. It supports full-speed execution control, register inspection, Flash programming, and real-time variable monitoring without halting peripheral operation.