NXP Semiconductors MC908AS60ACFN

Overview

MC908AS60ACFN from NXP (formerly Freescale) is an 8-bit HCS08 microcontroller featuring 60 KB on-chip Flash, 2 KB RAM, and integrated CAN 2.0A/B controller. It operates at up to 40 MHz bus speed, supports 5V operation, and includes ADC, SPI, SCI, and programmable timers - used in automotive body control modules and industrial sensor nodes.

For engineers reviewing the MC908AS60ACFN datasheet, MC908AS60ACFN pinout, MC908AS60ACFN application, or MC908AS60ACFN equivalent, key selection criteria include its 64-pin LQFP package, dual EEPROM blocks (512 B + 512 B), MSCAN interface compliance, and factory-programmed monitor ROM for in-system programming.

Technical Context

The MC908AS60ACFN implements the HCS08 CPU core with enhanced addressing modes and a 16-bit index register. Its System Integration Module (SIM) manages clock generation, reset sources (POR, LVI, COP), and interrupt prioritization across 27 vector locations.

It integrates two independent EEPROM arrays (EEPROM-1 and EEPROM-2), each with dedicated control registers, timebase dividers, and block protection - enabling robust data logging with wear-leveling support. The Clock Generator Module (CGM) includes a PLL with programmable bandwidth and crystal oscillator circuitry for stable timing in noisy environments.

Key Specifications

Pinout & Package

MC908AS60ACFN uses a 64-pin Low-Profile Quad Flat Package (LQFP) with exposed thermal pad. Pin functions are defined per the MC68HC908AS60A datasheet Rev. 6, Section 1.4 (Pin Assignments).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC908AS60ACFN, MC9S08DZ60CLC offers protocol-level enhancements while maintaining pin and code compatibility for CAN-centric designs; S9KEAZN64ACLH trades integrated CAN for ARM performance and scalability, necessitating hardware and firmware redesign.

Availability

MC908AS60ACFN is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor nodes, and home appliance motor controllers requiring stable component supply and long-term lifecycle support.

Supply support for MC908AS60ACFN 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 secure connectivity solutions for automotive, industrial, and IoT markets.

The MC908AS60ACFN belongs to the HCS08 microcontroller family, designed specifically for cost-sensitive, real-time embedded applications demanding high reliability, low power, and integrated communication interfaces in harsh electrical environments.

FAQ

What is the maximum operating frequency of the MC908AS60ACFN?

The MC908AS60ACFN supports a maximum bus frequency of 40 MHz, achieved via its internal PLL clock generator. This allows deterministic execution of time-critical tasks such as CAN message handling and ADC sampling at rates up to 100 kSPS. The PLL accepts input clocks from 1–8 MHz crystals and provides stable output regardless of supply voltage variation within the 4.5–5.5 V range.

Does the MC908AS60ACFN include a hardware CAN controller?

Yes, the MC908AS60ACFN integrates the MSCAN08 module, a fully compliant CAN 2.0A/B controller supporting bit rates up to 1 Mbit/s and all standard frame types (data, remote, error, overload). It features three transmit mailboxes, two receive mailboxes, and programmable acceptance filtering - eliminating the need for external CAN protocol ICs in most automotive and industrial implementations.

How does the dual EEPROM architecture benefit firmware design in the MC908AS60ACFN?

The MC908AS60ACFN provides two independent 512-byte EEPROM arrays (EEPROM-1 and EEPROM-2), each with dedicated control, configuration, and timebase registers. This enables simultaneous read/write operations across arrays, supports wear leveling across separate data sets (e.g., calibration constants vs. runtime logs), and allows one array to remain active during reprogramming of the other - improving system uptime and data integrity in field-deployed devices.

Can the MC908AS60ACFN enter low-power modes, and what are the wake-up sources?

Yes, the MC908AS60ACFN supports WAIT and STOP low-power modes. In STOP mode, current consumption drops below 10 µA while retaining RAM and register contents. Wake-up sources include external IRQ pin assertion, keyboard interrupt (KBI) on PTA0–PTA2, SCI receive activity, and real-time interrupts from the Programmable Interrupt Timer (PIT) - making it suitable for battery-powered sensor nodes requiring infrequent polling.

Is there factory-programmed firmware on the MC908AS60ACFN for programming support?

Yes, the MC908AS60ACFN includes a 1 KB Monitor ROM (MON) pre-programmed at manufacture. This ROM implements a serial bootloader accessible via the SCI interface, enabling in-system programming (ISP) of Flash memory without JTAG or external debug hardware - significantly reducing development and field update costs for high-volume embedded products.