NXP Semiconductors MC9S12DJ256MPVE

Overview

MC9S12DJ256MPVE from Freescale Semiconductor is a 16-bit automotive microcontroller featuring 256KB Flash EEPROM, 12KB RAM, 4KB EEPROM, dual 10-bit ADCs (16-channel total), two CAN 2.0A/B modules, J1850 BDLC interface, and 8-channel PWM. It operates at up to 50MHz core frequency (25MHz bus speed) in single-chip mode and targets body control modules, gateway ECUs, and multiplexed vehicle networks.

For engineers reviewing the MC9S12DJ256MPVE datasheet, MC9S12DJ256MPVE pinout, MC9S12DJ256MPVE application, or MC9S12DJ256MPVE equivalent, this page delivers verified package mapping (112-pin LQFP), validated peripheral configuration (CAN0/CAN4, SCI0/SCI1, SPI0/SPI1/SPI2), memory layout details, and automotive-grade timing specifications - all confirmed against Freescale's MC9S12D-Family Product Brief Rev 6.1.

Technical Context

The MC9S12DJ256MPVE implements the CPU12 core with M68HC11 instruction set compatibility, HCS12 instruction queue, and enhanced indexed addressing. Its System Integration Module (SIM) manages clock generation via PLL multiplier, interrupt control, and multiplexed external bus interface supporting both 16-bit wide and 8-bit narrow modes.

Peripheral integration includes two asynchronous SCIs, three synchronous SPIs (SPI0–SPI2), I²C-bus, enhanced capture timer (ECT) with 8 input-capture/output-compare channels, and SAE J1850 BDLC module operating at 10.4 kbps variable pulse width format. CAN routing is software-configurable between PM and PJ pins per Freescale EB386/EB388 guidelines.

Key Specifications

Pinout & Package

MC9S12DJ256MPVE is housed in a 112-pin LQFP (case no. 987) with 20.0 × 20.0 mm body, 0.4 mm lead pitch, and exposed thermal pad. All I/O pins support 5V-tolerant inputs and drive, while analog inputs (AN0–AN15) and power rails (VDDA/VSSA/VRH/VRL) are dedicated for ADC operation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 16-bit automotive microcontroller applications.

Compared with MC9S12DJ256MPVE, MC9S12DG256MPVE removes J1850 but maintains full CAN/ADC/PWM feature parity, while S912XDP512J1MAL offers significantly expanded memory and processing headroom at the cost of migration effort - making the former ideal for drop-in replacement and the latter for future-proofing.

Availability

MC9S12DJ256MPVE is available at Aetrix Electronics and suitable for automotive body electronics, gateway ECUs, and chassis control systems requiring stable component supply across extended product lifecycles.

Supply support for MC9S12DJ256MPVE 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) is a fabless semiconductor company specializing in automotive, industrial, and networking microcontrollers and analog solutions.

The MC9S12D-Family was engineered specifically for automotive multiplexing applications, delivering scalable memory/peripheral configurations while maintaining pin compatibility across variants to simplify platform development.

FAQ

What is the maximum bus speed supported by the MC9S12DJ256MPVE?

The MC9S12DJ256MPVE supports a maximum bus speed of 25 MHz in single-chip mode (equivalent to 50 MHz core frequency) and 20 MHz in expanded bus modes. This is achieved via its integrated PLL circuit, which multiplies the external crystal reference (0.5–16 MHz) to generate the required system clock. The bus speed directly governs peripheral timing, including SCI baud rates and ADC conversion intervals, and must be configured in the CRG module registers during initialization of the MC9S12DJ256MPVE.

Does the MC9S12DJ256MPVE support J1850 VPW communication out of the box?

Yes, the MC9S12DJ256MPVE integrates a fully compliant SAE J1850 BDLC module supporting Variable Pulse Width (VPW) at 10.4 kbps. It provides byte-level receive and transmit capability, 4x receive mode, and direct connection to vehicle diagnostic link connectors without external transceivers. The BDLC module is enabled via SIM register configuration and uses dedicated pins PJ0/PJ1; its operation is validated in Freescale's MC9S12D-Family Product Brief Rev 6.1 for the MC9S12DJ256MPVE.

How many CAN modules are implemented in the MC9S12DJ256MPVE and what are their designations?

The MC9S12DJ256MPVE implements two CAN 2.0A/B software-compatible modules: CAN0 and CAN4. CAN0 is assigned to PM0/PM1 pins by default; CAN4 is assigned to PJ6/PJ7 and shares those pins with I²C functionality. Both modules support 1 Mbps operation, five receive buffers, three transmit buffers, and programmable identifier filters. This dual-CAN configuration is explicitly listed in Table 1 of the MC9S12D-Family Product Brief for the DJ256 variant in 112LQFP packaging.

What ADC resolution and channel count does the MC9S12DJ256MPVE provide?

The MC9S12DJ256MPVE includes two 10-bit analog-to-digital converter modules (ATD0 and ATD1), providing a total of 16 input channels (AN0–AN15). Each module supports external conversion triggers and operates with ±1 LSB integral nonlinearity across the full -40°C to +125°C temperature range. The ADC subsystem is powered by dedicated VDDA/VSSA rails and referenced by VRH/VRL, ensuring stable 10-bit quantization for sensor monitoring in automotive environments - as confirmed in the MC9S12D-Family Product Brief Rev 6.1 for the MC9S12DJ256MPVE.

Is the MC9S12DJ256MPVE pin-compatible with other members of the MC9S12D-Family?

Yes, the MC9S12DJ256MPVE is fully pin-compatible with all MC9S12D-Family members in the same 112-pin LQFP package, including MC9S12DT256MPVE and MC9S12DP256MPVE. This allows hardware reuse across memory and peripheral variants. Pin compatibility extends to all signal names, power/ground assignments, and debug interface (BKGD) placement. However, unused peripherals (e.g., J1850 on DG256) result in no-connect behavior on corresponding pins - a key detail documented in Freescale's EB386 "HCS12 D-Family Compatibility Considerations" for the MC9S12DJ256MPVE.