NXP Semiconductors MC908GR32AMFUE

Overview

MC908GR32AMFUE from Freescale Semiconductor is an 8-bit HCS08-core microcontroller with 32 KB on-chip Flash memory, 1 KB RAM, and integrated peripherals including ADC (8-channel, 10-bit), ESCI (LIN-capable UART), SPI, two 16-bit TIM modules, and a PLL-based clock generator. It operates at up to 8 MHz bus frequency and supports 5.0 V operation in industrial temperature range (–40°C to +85°C), targeting embedded control in automotive body electronics and industrial sensor interfaces.

For engineers reviewing the MC908GR32AMFUE datasheet, MC908GR32AMFUE pinout, MC908GR32AMFUE application, or MC908GR32AMFUE equivalent, key selection criteria include its LIN-compliant ESCI module, 32 KB Flash with block protection, 10-bit ADC with internal reference, low-power stop/wait modes, and 48-pin QFP package compatibility with GR48/GR60 family footprint.

Technical Context

The MC908GR32AMFUE implements the HCS08 CPU core with enhanced addressing modes and a 16-level hardware stack. Its Clock Generator Module (CGM) integrates a crystal oscillator, PLL with programmable multiplier (×1 to ×32), and automatic acquisition/lock logic for stable clock synthesis across voltage and temperature.

The ESCI module supports both standard UART and LIN 1.3 protocol framing with break detection, sync field handling, and identifier-based response timing-enabling direct integration into automotive sub-networks without external protocol translators.

Key Specifications

Pinout & Package

MC908GR32AMFUE is housed in a 48-pin Quad Flat Package (QFP) with 0.5 mm pitch, thermally enhanced for convection cooling in compact control modules. Pin assignments follow the GR-family layout, enabling PCB reuse across GR32/GR48/GR60 variants where peripheral usage permits.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC908GR48AMFUE, the MC908GR32AMFUE trades Flash capacity for cost-sensitive volume production; versus S9KEAZN32ACLH, it delivers proven 8-bit determinism and zero-transceiver LIN implementation at lower BOM cost and design risk.

Availability

MC908GR32AMFUE is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor nodes, smart lighting controls, and appliance motor management requiring stable component supply and long-term industrial lifecycle support.

Supply support for MC908GR32AMFUE 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) pioneered mixed-signal microcontrollers for automotive and industrial markets, emphasizing robustness, qualification rigor, and long-term product availability.

The MC908GR32AMFUE belongs to the HCS08 GR-family, designed specifically for cost-sensitive, functionally focused embedded control in harsh environments where reliability, LIN interoperability, and 5 V compatibility are mandatory.

FAQ

What is the maximum bus frequency supported by the MC908GR32AMFUE?

The MC908GR32AMFUE supports a maximum bus frequency of 8 MHz, achieved via its integrated PLL clock generator with programmable multiplication factor (×1 to ×32) and crystal input range of 1–8 MHz. This allows flexible trade-offs between processing speed and power consumption while maintaining timing compliance for ESCI, SPI, and ADC operations within the MC908GR32AMFUE's specified electrical characteristics.

Does the MC908GR32AMFUE include hardware LIN protocol support?

Yes, the MC908GR32AMFUE's ESCI module provides hardware-level LIN 1.3 protocol support-including break field detection, sync field handling, and identifier-dependent response timing-without requiring bit-banging or external protocol ICs. This capability is confirmed in the "Enhanced Serial Communications Interface (ESCI) Module" chapter of the official datasheet (Rev. 5, April 2007), making the MC908GR32AMFUE suitable for automotive sub-network slave nodes.

How much Flash memory is protected by block lock bits in the MC908GR32AMFUE?

The MC908GR32AMFUE features 32 KB of Flash-1 memory divided into thirty-two 1-KB blocks, each with an individual lock bit in the FLASH-1 Block Protect Register. This enables selective protection of bootloader, calibration data, or security keys while allowing application code updates in unprotected blocks-ensuring firmware integrity without sacrificing field upgrade flexibility in the MC908GR32AMFUE.

What are the operating temperature limits for the MC908GR32AMFUE?

The MC908GR32AMFUE is rated for operation from –40°C to +85°C ambient temperature, qualified per industrial and automotive standards for extended thermal stability. This range is explicitly defined in Section 20.5 ("5.0-Vdc Electrical Characteristics") and Table 20-1 of the MC68HC908GR32A datasheet (Rev. 5), confirming suitability for under-dash, engine bay-proximate, and factory-floor environments where the MC908GR32AMFUE is deployed.

Can the MC908GR32AMFUE retain RAM contents during low-power modes?

The MC908GR32AMFUE retains RAM contents in Wait mode but not in Stop mode. In Wait mode, the CPU halts while clocks remain active for peripherals such as ADC and TIM, preserving 1 KB RAM state. In Stop mode, all clocks stop and RAM is powered down unless explicitly configured for partial retention-a behavior documented in Sections 2.6.7.2 and 2.7.7.2 of the MC68HC908GR32A datasheet, directly applicable to the MC908GR32AMFUE.