NXP Semiconductors MC9S12DJ256CCPV

Overview

MC9S12DJ256CCPV from NXP (formerly Freescale Semiconductor) is a 16-bit HCS12 microcontroller featuring 256 KB on-chip Flash EEPROM, 12 KB RAM, and integrated CAN 2.0A/B controller. It operates at up to 25 MHz bus clock via internal PLL, supports 8-channel 10-bit ATD converters, and delivers deterministic real-time control for automotive body electronics and industrial embedded systems.

For engineers reviewing the MC9S12DJ256CCPV datasheet, MC9S12DJ256CCPV pinout, MC9S12DJ256CCPV application, or MC9S12DJ256CCPV equivalent, key selection factors include its 80-pin QFP package, 5V-tolerant I/O, background debug interface (BDM), dual ATD modules with external trigger support, and MSCAN compliance with ISO 11898-1.

Technical Context

The MC9S12DJ256CCPV 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 self-clock modes with programmable PLL multiplication (1×–32×) and fail-safe clock monitor.

System integration includes dual 10-bit ATD converters (ATD0/ATD1) with 8/8 channels respectively, 8-channel PWM module with center-aligned capability, four SCI interfaces, two SPI modules, one I²C bus, and an enhanced capture timer (ECT) with 8 input-capture/output-compare channels.

Key Specifications

Pinout & Package

MC9S12DJ256CCPV is housed in an 80-pin LQFP (Low-Profile Quad Flat Package) with 0.5 mm pitch, measuring 12 mm × 12 mm. The package supports standard reflow soldering and provides thermal dissipation suitable for automotive under-hood environments.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC9S12DG256CPVE and S912XDP512J1MALR, the MC9S12DJ256CCPV offers optimal balance of proven reliability, compact 80-pin footprint, and full CAN 2.0A/B functionality-making it ideal for cost-sensitive, space-constrained automotive body electronics where legacy compatibility and long-term supply stability are critical.

Availability

MC9S12DJ256CCPV is available at Aetrix Electronics and suitable for automotive body control, industrial motor drives, and off-highway equipment diagnostics requiring stable component supply across extended product lifecycles.

Supply support for MC9S12DJ256CCPV 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 MC9S12DJ256CCPV belongs to the HCS12 family, designed specifically for cost-effective, high-reliability embedded control in harsh automotive environments-emphasizing CAN communication, analog sensing, and deterministic real-time response.

FAQ

What is the maximum bus clock frequency supported by the MC9S12DJ256CCPV?

The MC9S12DJ256CCPV supports a maximum bus clock frequency of 25 MHz. This is achieved using the internal Phase-Locked Loop (PLL) with programmable multiplication factor (REFDV and SYNR registers), accepting crystal inputs from 1 MHz to 8 MHz. The PLL lock time and stability are specified in the oscillator characteristics table (A-15) of the device user guide.

Does the MC9S12DJ256CCPV support in-circuit debugging without halting program execution?

Yes, the MC9S12DJ256CCPV supports non-intrusive debugging via its Background Debug Mode (BDM) interface using the BKGD pin. This allows real-time memory inspection, register reads/writes, and flash programming while the CPU continues normal operation-critical for validating timing-critical automotive control loops during development.

How many analog input channels does the MC9S12DJ256CCPV provide, and what is their resolution?

The MC9S12DJ256CCPV integrates two independent 10-bit Analog-to-Digital Converters: ATD0 with 8 channels (AN00–AN07) and ATD1 with 8 channels (AN08–AN15). Each converter supports software or external trigger (ETRIG0/ETRIG1), configurable sample-and-hold time, and selectable reference voltages (VRH/VRL), enabling precise sensor monitoring in automotive and industrial applications.

Is the MC9S12DJ256CCPV qualified for automotive applications, and what standards does it meet?

Yes, the MC9S12DJ256CCPV is AEC-Q100 qualified for automotive use and designed to operate reliably across –40°C to +125°C ambient temperature. It meets ISO 11898-1 for CAN physical layer compliance and supports functional safety requirements through features like clock monitor, COP watchdog, and memory protection-commonly deployed in body electronics and chassis subsystems.

Can the MC9S12DJ256CCPV be used with external memory, and what interface does it support?

No, the MC9S12DJ256CCPV does not support external memory expansion. Unlike the MC9S12DP256B or MC9S12DG256C variants, the DJ-series lacks the multiplexed external bus interface (address/data bus, R/W, CS, etc.). Its memory subsystem is fully internal: 256 KB Flash, 12 KB RAM, and 4 KB EEPROM-optimized for self-contained, space-constrained automotive modules.