NXP Semiconductors MC9S12DG256BCPV

Overview

MC9S12DG256BCPV from Freescale Semiconductor (now NXP) is a 16-bit HCS12 microcontroller with 256 KB on-chip Flash EEPROM, 12 KB RAM, and integrated CAN 2.0A/B controller, designed for automotive body electronics and industrial control systems requiring deterministic real-time response, robust communication, and embedded safety features. It operates at up to 25 MHz bus clock, supports 5V I/O, and includes 10-bit ATD converters, PWM modules, and background debug interface.

For engineers reviewing the MC9S12DG256BCPV datasheet, MC9S12DG256BCPV pinout, MC9S12DG256BCPV application, or MC9S12DG256BCPV equivalent, this page delivers verified technical context, package-validated pin functions, real-world use scenarios in automotive gateways and motor control, and two confirmed alternative parts with documented functional and layout implications.

Technical Context

The MC9S12DG256BCPV 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 PLL multiplication (up to 50 MHz internal), and includes clock monitor and fail-safe reset logic.

It integrates dual 10-bit ATD converters (ATD0/ATD1) with 16-channel multiplexed inputs, eight PWM channels with center-aligned and edge-aligned modes, and a full MSCAN module compliant with ISO 11898-1. The device uses an 80-pin QFP package with dedicated VDDA/VSSA for analog supply and separate VDDPLL/VSSPLL for phase-locked loop stability.

Key Specifications

Pinout & Package

MC9S12DG256BCPV is housed in an 80-pin Plastic Quad Flat Package (QFP), case number 841B, with 0.65 mm lead pitch and 12 × 12 mm body size. Thermal resistance θ_JA is 45°C/W (JEDEC standard PCB).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC9S12DG256BCPV, MC9S12DJ256CPV removes CAN but adds serial interfaces - ideal for non-automotive control where bus communication is SPI/SCI-based; S912XDP512J0VLH upgrades memory, safety features, and CAN capability but mandates new layout and toolchain validation.

Availability

MC9S12DG256BCPV is available at Aetrix Electronics and suitable for automotive body electronics, industrial motor control, and commercial vehicle gateway applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for MC9S12DG256BCPV 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

Freescale Semiconductor, now part of NXP Semiconductors, pioneered automotive-grade microcontrollers with robust analog integration, CAN connectivity, and functional safety features.

The MC9S12DG256BCPV belongs to the HCS12 family, engineered specifically for cost-sensitive automotive body control and industrial automation applications demanding high reliability, 5V operation, and embedded CAN networking.

FAQ

What is the maximum bus clock frequency supported by the MC9S12DG256BCPV?

The MC9S12DG256BCPV supports a maximum bus clock frequency of 25 MHz. This is achieved using the internal PLL with an external crystal (e.g., 8 MHz) and appropriate SYNR/REFDV register settings. At 25 MHz, the device delivers up to 50 MIPS performance, sufficient for real-time control tasks in automotive and industrial applications. The PLL lock time and oscillator startup characteristics are specified in the device's Electrical Characteristics appendix.

Does the MC9S12DG256BCPV include an on-chip voltage regulator, and how is it enabled?

Yes, the MC9S12DG256BCPV includes an on-chip voltage regulator that generates 2.5 V for the core logic from the 5 V supply. It is enabled by driving the VREGEN pin high (typically tied to VDDX). When VREGEN is asserted, the internal regulator powers the CPU, Flash, and RAM blocks. If disabled, external 2.5 V must be supplied to VDDR/VSSR - a configuration not recommended for standard operation.

How many CAN controllers does the MC9S12DG256BCPV integrate, and what standards do they support?

The MC9S12DG256BCPV integrates one MSCAN controller compliant with ISO 11898-1 (CAN 2.0A/B). It supports both standard (11-bit) and extended (29-bit) identifiers, programmable bit timing, automatic retransmission, and error confinement. While the pinout allows connection to multiple external transceivers (e.g., CAN0 through CAN3 signals on Port M), only one CAN protocol engine is implemented - limiting concurrent active CAN buses to one physical channel.

What packaging and thermal specifications apply to the MC9S12DG256BCPV?

The MC9S12DG256BCPV is packaged in an 80-pin Plastic Quad Flat Package (QFP), case number 841B, with 0.65 mm lead pitch and 12 × 12 mm body size. Its junction-to-ambient thermal resistance (θ_JA) is 45°C/W under JEDEC-standard PCB conditions. The package supports reflow soldering per IPC/JEDEC J-STD-020, and its lead finish is matte tin - RoHS-compliant and compatible with standard assembly processes.

Can the MC9S12DG256BCPV be debugged in-circuit, and what interface is used?

Yes, the MC9S12DG256BCPV supports in-circuit debugging via the Background Debug Mode (BDM) interface using the BKGD pin. This single-wire interface enables full visibility into CPU registers, memory, and peripheral states, supports flash programming, and allows setting breakpoints and stepping through code - all without halting real-time operation of other peripherals. BDM is supported by standard tools including P&E Micro's Cyclone and NXP's S32DS.