NXP Semiconductors MC9S12DG256CPVE

Overview

MC9S12DG256CPVE from NXP (formerly Motorola) is a 16-bit HCS12 microcontroller with 256 KB Flash, 12 KB RAM, and dual 10-bit ATD converters. It features two CAN 2.0B controllers (CAN0 and CAN4), 8-channel PWM, SPI, SCI, I²C, and J1850 BDLC support. Designed for automotive body control modules requiring deterministic real-time response and robust communication.

For engineers reviewing the MC9S12DG256CPVE datasheet, MC9S12DG256CPVE pinout, MC9S12DG256CPVE application, or MC9S12DG256CPVE equivalent, key selection criteria include CAN interface count, 112-pin LQFP package compatibility, 5V I/O tolerance, on-chip voltage regulator enable (VREGEN), and background debug (BKGD) support for in-circuit development.

Technical Context

The MC9S12DG256CPVE implements the HCS12 CPU12 core with 16-bit data path and 24-bit address bus, supporting up to 25 MHz internal bus clock via PLL. Its Clock and Reset Generator (CRG) block supports multiple oscillator modes (Colpitts, Pierce, external clock) and includes programmable PLL multiplication (×1 to ×32) with XCLKS output for external synchronization.

Memory architecture integrates 256 KB on-chip Flash (with burst programming), 4 KB EEPROM, and 12 KB RAM. Peripheral integration includes two independent MSCAN modules (CAN0/CAN4), dual 16-channel ATD converters with hardware trigger inputs (ETRIG0/ETRIG1), and enhanced capture timer (ECT) with input capture/output compare capabilities.

Key Specifications

Pinout & Package

MC9S12DG256CPVE is housed in a 112-pin Low-Profile Quad Flat Package (LQFP), case number 987, with 0.65 mm lead pitch and exposed thermal pad. Pin assignments follow standard HCS12 signal multiplexing across Ports A, B, E, H, J, K, M, P, S, and T.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC9S12DG256CPVE, MC9S12DJ256CPVE offers identical footprint and feature set minus CAN1-making it a drop-in alternative where that peripheral is unused-while S912XDP512J1MALR delivers architectural upgrades and expanded resources but mandates hardware redesign.

Availability

MC9S12DG256CPVE is available at Aetrix Electronics and suitable for automotive body electronics, industrial CAN gateways, and heavy-duty vehicle telematics requiring stable component supply and long-term lifecycle support.

Supply support for MC9S12DG256CPVE 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 delivering secure, scalable solutions for automotive, industrial, and IoT applications, with deep heritage in microcontroller innovation.

The MC9S12DG256CPVE belongs to the HCS12 family, engineered specifically for cost-sensitive, real-time automotive control applications demanding CAN connectivity, analog sensing, and robust debug capability.

FAQ

What is the maximum bus clock frequency supported by the MC9S12DG256CPVE?

The MC9S12DG256CPVE supports a maximum bus clock frequency of 25 MHz, achieved via its integrated Phase-Locked Loop (PLL) with programmable multiplication factor (×1 to ×32) and external crystal or oscillator input. This frequency governs instruction execution speed, peripheral timing, and communication baud rates across all on-chip modules including CAN, SPI, and SCI.

Does the MC9S12DG256CPVE include an internal voltage regulator?

Yes, the MC9S12DG256CPVE includes an on-chip voltage regulator that converts 5 V supply to 2.5 V for internal core logic. Its operation is controlled by the VREGEN pin: asserting VREGEN high enables regulation, while pulling it low disables the regulator and requires external 2.5 V supply. This feature simplifies power design and reduces external component count in 5 V system architectures.

How many CAN controllers does the MC9S12DG256CPVE integrate, and which standards do they support?

The MC9S12DG256CPVE integrates two fully independent MSCAN controllers: CAN0 and CAN4. Both comply with ISO 11898-1 (CAN 2.0B Active), supporting standard and extended frame formats, bit rates up to 1 Mbps, and message filtering with 64-message mailboxes. They operate concurrently and share no register conflicts, enabling dual-network communication in automotive domain controllers.

What debug interface does the MC9S12DG256CPVE provide, and how is it accessed?

The MC9S12DG256CPVE provides a Background Debug Mode (BDM) interface accessible via the BKGD pin. This single-wire, synchronous serial interface enables non-intrusive flash programming, real-time register inspection, breakpoint insertion, and memory read/write operations without halting CPU execution. It requires only one dedicated pin and a compatible BDM pod or debugger, such as the P&E Micro USB-ML-12.

Is the MC9S12DG256CPVE pin-compatible with other members of the MC9S12D family?

Yes, the MC9S12DG256CPVE in the 112-pin LQFP package (PV code) is pin-compatible with MC9S12DT256CPVE and MC9S12DJ256CPVE. All share identical pin assignments, power sequencing, and I/O electrical characteristics. Functional differences-such as presence/absence of CAN1 or J1850-do not affect pin mapping, allowing direct substitution in existing PCB layouts where peripheral usage aligns.