NXP Semiconductors MC9S12DJ128VFUE

Overview

MC9S12DJ128VFUE from Freescale Semiconductor is a 16-bit automotive microcontroller featuring 128KB Flash EEPROM, 8KB RAM, 2KB 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 25MHz bus speed (50MHz CPU equivalent) in single-chip mode and targets body control modules, lighting systems, and gateway ECUs requiring robust CAN-based multiplexing.

For engineers reviewing the MC9S12DJ128VFUE datasheet, MC9S12DJ128VFUE pinout, MC9S12DJ128VFUE application, or MC9S12DJ128VFUE equivalent, key selection criteria include its 112-pin LQFP package, dual CAN + J1850 support, 25MHz bus clock capability, 5V-tolerant I/O with 2.5V core, and background debug mode (BDM) for in-circuit development.

Technical Context

The MC9S12DJ128VFUE implements the CPU12 core-upward compatible with M68HC11 instruction set-with HCS12 instruction queue and enhanced indexed addressing. Its System Integration Module (SIM) manages clock generation (including PLL multiplier), interrupt control, reset logic, and multiplexed external bus interface supporting both 16-bit wide and 8-bit narrow modes.

Peripheral integration includes two asynchronous SCI interfaces, two SPI modules (SPI0 and SPI1), I²C bus controller, Enhanced Capture Timer (ECT) with 8 input-capture/output-compare channels, and flexible CAN routing where CAN0/CAN4 share pins with J1850 and I²C under software control-confirmed for this variant per Table 1 and pin assignment diagrams.

Key Specifications

Pinout & Package

MC9S12DJ128VFUE uses a 112-pin LQFP package (case number 987) with 20.0 mm × 20.0 mm body, 0.65 mm lead pitch, and exposed thermal pad. Pin functions follow the MC9S12D-Family standard mapping, with dedicated CAN0/CAN4, J1850, SCI, SPI, I²C, ADC, and PWM signal assignments confirmed in Figures 1 and Table 1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC9S12DJ128VFUE, MC9S12DG128VFUE removes J1850 while preserving all other peripherals and pinout-ideal for CAN-only designs; S912XDP512J1MAL offers significantly more memory and CAN channels but lacks J1850 and requires architectural revalidation.

Availability

MC9S12DJ128VFUE is available at Aetrix Electronics and suitable for automotive body electronics, lighting control, gateway ECUs, and seat control modules requiring stable component supply across extended temperature ranges (−40°C to +125°C).

Supply support for MC9S12DJ128VFUE 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) designed high-reliability microcontrollers for automotive and industrial applications, emphasizing functional safety, long-term availability, and ecosystem support.

The MC9S12D-Family-including MC9S12DJ128VFUE-was engineered specifically for automotive multiplexing systems, delivering scalable memory/peripheral configurations while maintaining pin compatibility across variants for platform reuse.

FAQ

What is the maximum bus speed supported by the MC9S12DJ128VFUE?

The MC9S12DJ128VFUE supports a maximum bus speed of 25 MHz in single-chip mode (equivalent to 50 MHz CPU clock), verified in the Product Brief Rev 6.1. This speed is achievable using the on-chip PLL with an external crystal reference between 0.5 MHz and 16 MHz. The MC9S12DJ128VFUE maintains this performance across its full operating temperature range of −40°C to +125°C.

Does the MC9S12DJ128VFUE include a J1850 interface?

Yes, the MC9S12DJ128VFUE integrates a SAE J1850 BDLC (Body Data Link Controller) module compliant with the Variable Pulse Width (VPW) specification at 10.4 kbps. As confirmed in Table 1 and the Product Brief, this feature distinguishes the "J" variant (e.g., DJ128) from "D" or "G" variants and enables direct connection to legacy vehicle diagnostic tools without external transceivers.

How many CAN modules does the MC9S12DJ128VFUE support, and what are their configurations?

The MC9S12DJ128VFUE supports exactly two CAN 2.0A/B software-compatible modules: CAN0 and CAN4. Per Table 1 and pin routing notes, CAN0 uses PM0/PM1, while CAN4 uses PJ6/PJ7 (shared with I²C). Each module provides five receive and three transmit buffers, four dedicated interrupt channels (RX/TX/Error/Wake-up), and flexible identifier filtering-fully documented in the MC9S12D-Family reference manual.

What package type and pin count does the MC9S12DJ128VFUE use?

The MC9S12DJ128VFUE uses a 112-pin LQFP package (case number 987), as explicitly stated in Table 1 and illustrated in Figure 1. Mechanical dimensions confirm a 20.0 mm × 20.0 mm body with 0.65 mm lead pitch. This package provides full peripheral access-including all 16 ADC inputs, dual CAN, J1850, and 8 PWM channels-unlike the 80-pin QFP variant which reduces I/O count and disables certain features.

Is the MC9S12DJ128VFUE pin-compatible with other MC9S12D-Family members?

Yes, the MC9S12DJ128VFUE is fully pin-compatible with other 112-pin LQFP variants in the MC9S12D-Family, including MC9S12DT128VFUE and MC9S12DG128VFUE. This compatibility enables hardware reuse across memory/peripheral configurations, as emphasized in the Product Brief introduction and validated by identical pin assignments in Figure 1-though peripheral enablement depends on internal configuration registers and mask options.