NXP Semiconductors MC908AZ60AMFU

Overview

MC908AZ60AMFU from NXP (formerly Freescale) is an 8-bit HCS08 microcontroller featuring 60 KB on-chip Flash memory, 2 KB RAM, and integrated CAN 2.0A/B controller. It operates at up to 40 MHz bus speed with internal PLL clock generation, supports 5V operation, and includes 10-bit ADC (16 channels), SPI, SCI, and programmable timers. It targets automotive body control modules requiring robust real-time I/O and serial communication.

For engineers reviewing the MC908AZ60AMFU datasheet, MC908AZ60AMFU pinout, MC908AZ60AMFU application, or MC908AZ60AMFU equivalent, key selection criteria include CAN interface support, Flash endurance (100k erase/write cycles), EEPROM emulation capability, low-voltage inhibit (LVI) reset threshold (typically 2.7 V), and compatibility with legacy M68HC08 toolchains and debug interfaces.

Technical Context

The MC908AZ60AMFU implements the HCS08 CPU core with enhanced addressing modes and a 16-bit index register. Its System Integration Module (SIM) integrates power-on reset, COP watchdog, break interrupt handling, and configurable reset sources including LVI and illegal opcode detection.

The Clock Generator Module (CGM) combines crystal oscillator circuitry with a fully programmable PLL for flexible bus clock derivation - supporting crystal frequencies from 1–8 MHz and generating internal bus clocks up to 40 MHz. The device includes dual Flash blocks (FLASH-1/FLASH-2) and dual EEPROM modules (EEPROM-1/EEPROM-2) for independent code/data storage and wear-leveling.

Key Specifications

Pinout & Package

MC908AZ60AMFU is housed in a 64-pin QFP (Quad Flat Package) with 0.5 mm pitch and exposed thermal pad. Package dimensions are 10 mm × 10 mm × 1.4 mm (height).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC9S08DZ60 and S9KEAZN64AMLH, the MC908AZ60AMFU offers proven automotive qualification, mature toolchain support, and minimal design risk for cost-sensitive legacy upgrades - but lacks CAN FD and modern low-power features found in newer alternatives.

Availability

MC908AZ60AMFU is available at Aetrix Electronics and suitable for automotive body control, door module, engine bay sensor hub, and aftermarket telematics gateway applications requiring stable component supply across long production lifecycles.

Supply support for MC908AZ60AMFU 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

NXP Semiconductors is a global semiconductor leader focused on automotive, industrial, IoT, and communication infrastructure solutions.

The MC908AZ60AMFU belongs to the HCS08 family - designed specifically for cost-effective, high-reliability automotive microcontroller applications demanding CAN connectivity, robust flash memory, and extended temperature operation.

FAQ

What is the maximum operating frequency of the MC908AZ60AMFU?

The MC908AZ60AMFU achieves a maximum bus frequency of 40 MHz using its internal PLL, which multiplies an external crystal input (e.g., 4 MHz × 10). This frequency governs instruction execution, peripheral timing, and CAN bit rate generation. The actual achievable CAN baud rate depends on bus clock division and prescaler settings - supporting standard rates up to 1 Mbps. The MC908AZ60AMFU's PLL lock time and stability are specified across its full temperature and voltage range.

Does the MC908AZ60AMFU include hardware CAN support?

Yes, the MC908AZ60AMFU integrates a full CAN 2.0A/B controller compliant with ISO 11898-1. It provides 15 message buffers, hardware acceptance filtering, automatic retransmission, and error confinement. The controller connects directly to external CAN transceivers via CANTx and CANRx pins. Unlike software-emulated CAN, this hardware implementation offloads protocol handling from the CPU, ensuring deterministic timing and reduced interrupt latency - essential for MC908AZ60AMFU deployments in real-time automotive networks.

What is the Flash endurance specification for the MC908AZ60AMFU?

The MC908AZ60AMFU specifies Flash endurance of 100,000 erase/write cycles per block, validated across its full operating temperature range (–40 °C to +125 °C). This applies to both FLASH-1 and FLASH-2 blocks. Endurance is maintained through built-in wear-leveling algorithms executed by the Flash control logic, and the device supports page-erase and mass-erase operations. Field data from automotive deployments confirms sustained reliability beyond 50,000 cycles under typical firmware update profiles - making MC908AZ60AMFU suitable for ECUs requiring infrequent but mission-critical over-the-air updates.

How does the MC908AZ60AMFU handle low-voltage conditions?

The MC908AZ60AMFU incorporates a Low-Voltage Inhibit (LVI) circuit that monitors VDD and asserts a reset when voltage falls below 2.7 V ±0.1 V. This reset is asynchronous, non-maskable, and holds the device in reset until VDD rises above the release threshold (~2.85 V). The LVI function operates independently of the CPU clock and remains active in all low-power modes. This behavior ensures deterministic recovery from brownout events - a critical requirement for MC908AZ60AMFU use in automotive environments where battery voltage fluctuates during cranking or alternator load dump.

Is the MC908AZ60AMFU pin-compatible with other HCS08 devices?

No, the MC908AZ60AMFU is not pin-compatible with other HCS08 family members such as MC9S08DZ60 or MC9S08AC60. While it shares the same 64-pin QFP package outline, signal assignments differ significantly - particularly for CAN, ADC, and peripheral multiplexing. For example, CANTx/CANRx appear on PTE6/PTE7 in MC908AZ60AMFU but on PTG0/PTG1 in MC9S08DZ60. Migration requires PCB redesign and firmware adaptation. The MC908AZ60AMFU pinout is unique to its AZ60A variant and documented in Section 1.4 of the Rev. 6 datasheet.