NXP Semiconductors MC9S12DG128CFUER

Overview

MC9S12DG128CFUER from NXP Semiconductors (formerly Freescale) is a 16-bit HCS12 microcontroller with 128 KB on-chip Flash, 8 KB RAM, and integrated CAN 2.0B controller. It operates at up to 25 MHz bus frequency, supports 5 V I/O, and features 10-bit ATD converter with 16 channels, 8-channel PWM, and background debug interface. It targets automotive body control modules requiring robust real-time control and CAN network integration.

For engineers reviewing the MC9S12DG128CFUER datasheet, MC9S12DG128CFUER pinout, MC9S12DG128CFUER application, or MC9S12DG128CFUER equivalent, key selection criteria include its 112-pin LQFP package, 5 V tolerant I/O, single CAN controller with dedicated TX/RX pins, PLL-based clock generation, and AEC-Q100 qualification status for automotive use.

Technical Context

The MC9S12DG128CFUER implements the HCS12 CPU core with 16-bit data path, 24-bit address space, and instruction set backward-compatible with HC12. Its Clock and Reset Generator (CRG) block supports crystal, external clock, or Pierce oscillator inputs, and includes a PLL with programmable multiplication factor (1–32×) to generate stable bus clocks up to 25 MHz from low-frequency crystals.

It integrates a full MSCAN module compliant with ISO 11898-1, supporting both standard and extended frames, programmable bit timing, and three message buffers. The device also includes an 8-channel 8-bit PWM subsystem with center-aligned and edge-aligned modes, and a 16-channel 10-bit ATD converter with configurable sample-and-hold and conversion triggers.

Key Specifications

Pinout & Package

The MC9S12DG128CFUER is housed in a 112-pin LQFP (lead-free, RoHS-compliant) package with 0.4 mm pitch and exposed thermal pad. Pin assignments follow the MC9S12DT128 derivative family layout per Figure 2-1 of the Device User Guide.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC9S12DG128CFUER, MC9S12DJ128CPVE trades CAN for J1850 and lacks MSCAN, while S912XDP512J1MAL delivers significantly higher Flash capacity and dual CAN but requires board redesign due to different pinout and voltage requirements.

Availability

MC9S12DG128CFUER is available at Aetrix Electronics and suitable for automotive body control, instrument cluster, and two-wheel vehicle ECU applications requiring stable component supply, long-term lifecycle support, and AEC-Q100 qualified silicon.

Supply support for MC9S12DG128CFUER 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 company formed from the spin-off of Philips' semiconductor division, specializing in secure connectivity solutions for automotive, industrial, and IoT markets.

The MC9S12DG128CFUER belongs to the HCS12 microcontroller family, designed specifically for cost-sensitive, high-reliability automotive applications requiring CAN communication, real-time control, and extended temperature operation (−40°C to +125°C).

FAQ

What is the maximum bus frequency supported by the MC9S12DG128CFUER?

The MC9S12DG128CFUER supports a maximum bus frequency of 25 MHz. This is achieved using the on-chip Phase-Locked Loop (PLL) to multiply a crystal oscillator input (e.g., 4 MHz or 8 MHz) by a programmable factor. At 25 MHz, the instruction cycle time is 40 ns, enabling deterministic execution for time-critical automotive control tasks. The PLL configuration and filter component values must be selected per the CRG section of the Device User Guide to ensure stability and low jitter.

Does the MC9S12DG128CFUER include a CAN controller, and what version does it support?

Yes, the MC9S12DG128CFUER includes one fully integrated MSCAN 2.0B controller compliant with ISO 11898-1. It supports both standard (11-bit) and extended (29-bit) identifier formats, programmable bit timing, three message buffers, and hardware acceptance filtering. The CAN peripheral uses dedicated pins PJ7 (TXCAN0) and PJ6 (RXCAN0), and requires an external CAN transceiver for physical layer interfacing. This makes the MC9S12DG128CFUER suitable for automotive body networks and subsystem communication.

What package type and pin count does the MC9S12DG128CFUER use?

The MC9S12DG128CFUER uses a 112-pin LQFP (Low-Profile Quad Flat Package) with lead-free (Pb-free) finish and RoHS compliance. The package has 0.4 mm pin pitch and includes an exposed thermal pad for enhanced heat dissipation. Pin assignments match the MC9S12DT128 derivative family layout documented in Figure 2-1 of the Device User Guide, ensuring compatibility with existing HCS12 design resources and layout footprints.

Is the MC9S12DG128CFUER qualified for automotive applications?

Yes, the MC9S12DG128CFUER is AEC-Q100 qualified for automotive applications. It is rated for operation across the extended temperature range of −40°C to +125°C and meets stringent reliability, ESD, and latch-up immunity requirements defined in the AEC-Q100 standard. This qualification confirms its suitability for under-hood and cabin-mounted electronic control units where environmental stress and long-term operational stability are critical design constraints.

How is debug and programming performed on the MC9S12DG128CFUER?

Debug and programming on the MC9S12DG128CFUER are performed via the Background Debug Mode (BDM) interface using the BKGD/TAGHI pin. This single-wire serial interface supports full in-circuit debugging, flash memory erase and programming, register inspection, and real-time breakpoint control without halting system operation. BDM requires a compatible debugger (e.g., P&E Multilink or NXP DEMO9S12DG128) and is enabled by default at reset unless disabled via security lock. The MC9S12DG128CFUER also supports unsecuring via backdoor key access if flash protection is enabled.