NXP Semiconductors MC9S12C64CFAER

Overview

MC9S12C64CFAER from NXP (formerly Freescale) is a 16-bit HCS12 microcontroller featuring 64 KB on-chip Flash, 4 KB RAM, and integrated CAN 2.0A/B controller, designed for automotive body electronics and industrial control applications requiring deterministic real-time response and robust communication.

For engineers reviewing the MC9S12C64CFAER datasheet, MC9S12C64CFAER pinout, MC9S12C64CFAER application, or MC9S12C64CFAER equivalent, key selection criteria include its 50 MHz bus speed, 8-channel 10-bit ADC with 8 µs conversion time, background debug module (BDM) support, and 80-pin LQFP package with automotive-grade temperature range (–40°C to +125°C).

Technical Context

The MC9S12C64CFAER implements the S12 CPU core with 16-bit data path and 24-bit addressing, supporting up to 128 KB addressable memory space. It integrates a scalable CAN controller (S12MSCANV2), 16-bit timer module (TIM16B8CV1), and dual-output voltage regulator (VREG3V3V2) for internal 3.3 V supply generation.

Its clock system includes a PLL-based frequency multiplier, crystal oscillator (OSCV2), and clock monitor with fail-safe reset. The device supports multiple low-power modes (WAIT, STOP, Pseudo-STOP) and features hardware security via BDM lock and flash protection registers.

Key Specifications

Pinout & Package

MC9S12C64CFAER is housed in an 80-pin LQFP package (JEDEC MS-026AC) with 4 dedicated power/ground pairs, 2 CAN differential pins (CANH/CANL), 8 analog input pins (AN0–AN7), and BKGD pin for single-wire background debug interface.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC9S12C64CFAER, the MC9S12C128CFAER offers direct scalability in Flash capacity while preserving hardware compatibility, whereas the S912XDP512J0VAA introduces architectural enhancements at the cost of layout and software investment.

Availability

MC9S12C64CFAER is available at Aetrix Electronics and suitable for automotive body electronics, industrial motor control, and commercial vehicle telematics requiring stable component supply across extended product lifecycles.

Supply support for MC9S12C64CFAER 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 applications.

The MC9S12C family was engineered for cost-sensitive, high-reliability automotive control units where CAN integration, debug accessibility, and extended temperature operation are mandatory design requirements.

FAQ

What is the maximum operating frequency of the MC9S12C64CFAER?

The MC9S12C64CFAER achieves a maximum bus frequency of 50 MHz using its internal PLL, which multiplies a 4–8 MHz crystal input. This frequency governs peripheral timing, instruction execution, and CAN bit rate accuracy. The S12 CPU core executes instructions at approximately 25 MHz effective speed due to its two-cycle-per-instruction architecture, and the MC9S12C64CFAER maintains this performance across its full –40°C to +125°C automotive temperature range.

Does the MC9S12C64CFAER support in-circuit debugging without external hardware?

Yes, the MC9S12C64CFAER includes a fully integrated Background Debug Module (BDMV4) accessible via the single BKGD pin. This allows full flash programming, breakpoint setting, register inspection, and real-time variable monitoring using only a simple level-shifting interface - no JTAG adapter or external emulator is required. The MC9S12C64CFAER's BDM implementation complies with Freescale's standard BDM protocol and is supported by CodeWarrior Development Studio v5.1 and later.

What are the power supply requirements for the MC9S12C64CFAER?

The MC9S12C64CFAER requires two primary supply domains: a 5 V ±10% digital supply (VDD/VSS) and a separate 5 V ±10% analog supply (VDDA/VSSA) for ADC reference stability. Its integrated VREG3V3V2 regulator generates an internal 3.3 V supply for core logic. The MC9S12C64CFAER draws 35 mA typical active current at 50 MHz and less than 10 µA in STOP mode with RTC enabled, making it suitable for always-on automotive modules.

Can the MC9S12C64CFAER operate with a ceramic resonator instead of a crystal?

No - the MC9S12C64CFAER's oscillator circuit (OSCV2) is designed exclusively for fundamental-mode quartz crystals in the 4–8 MHz range. Ceramic resonators lack the required Q-factor and frequency stability for reliable PLL lock and CAN timing compliance. Using a resonator will result in failed PLL initialization, inconsistent bus timing, and non-compliant CAN bit sampling. The MC9S12C64CFAER datasheet explicitly specifies crystal-only operation for all production configurations.

How many CAN message buffers does the MC9S12C64CFAER support?

The MC9S12C64CFAER integrates one S12MSCANV2 module with 15 individually configurable message buffers - 8 transmit and 7 receive - each supporting full 11-bit or 29-bit identifier filtering and flexible data length (0–8 bytes). These buffers operate independently under DMA-like arbitration, enabling concurrent transmission and reception without CPU intervention. This buffer count is fixed for the MC9S12C64CFAER and matches all members of the MC9S12C family.