NXP Semiconductors MC9S12DT256MFUE

Overview

MC9S12DT256MFUE from NXP (formerly Motorola) is a 16-bit HCS12 microcontroller featuring 256 KB on-chip Flash, 12 KB RAM, and integrated triple CAN 2.0B controllers (CAN0/CAN1/CAN4), 10-bit ATD with 16 channels, 8-channel PWM, SPI, SCI, IIC, and J1850 BDLC support - deployed in automotive body control modules and industrial motor control systems.

For engineers reviewing the MC9S12DT256MFUE datasheet, MC9S12DT256MFUE pinout, MC9S12DT256MFUE application, or MC9S12DT256MFUE equivalent, key selection criteria include its 80-pin QFP package, 5V tolerant I/O, 25 MHz bus clock capability, triple-CAN interface timing compliance, and Flash EEPROM endurance of 10,000 program/erase cycles at rated temperature.

Technical Context

The MC9S12DT256MFUE implements the HCS12 CPU12 core with 16-bit data path, 24-bit addressing, and background debug mode (BDM). Its Clock and Reset Generator (CRG) supports multiple clock sources including external crystal (4–32 MHz), ceramic resonator, or external clock, with PLL multiplication up to 50 MHz internal core frequency.

Memory architecture includes 256 KB Flash organized in 2 KB sectors with burst programming, 4 KB EEPROM with 100K write cycles, and 12 KB RAM. Peripheral integration includes three independent MSCAN modules with full CAN 2.0B protocol support, dual 10-bit ATD converters (ATD0/ATD1) with simultaneous sampling, and 8-channel enhanced PWM with center-aligned and edge-aligned modes.

Key Specifications

Pinout & Package

MC9S12DT256MFUE is housed in an 80-pin Quad Flat Package (QFP), designated FU package code per NXP documentation. Pin assignments follow the MC9S12DT256-specific 80-pin QFP layout defined in Figure 2-2 of the Device User Guide (V03.07).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC9S12DJ256CPVE, MC9S12DT256MFUE provides essential CAN1 support for complex vehicle networks; versus S912XDP512J1MAL, it offers proven qualification for legacy automotive platforms with lower software migration effort despite reduced memory and no XGATE acceleration.

Availability

MC9S12DT256MFUE is available at Aetrix Electronics and suitable for automotive body electronics, industrial motor control, and heavy-duty telematics applications requiring stable component supply across extended product lifecycles.

Supply support for MC9S12DT256MFUE 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 markets, with deep heritage in automotive microcontrollers dating to Motorola's HCS12 family.

The MC9S12DT256MFUE belongs to the HCS12D derivative family, engineered specifically for cost-sensitive, high-reliability automotive applications demanding robust CAN networking, analog signal conditioning, and long-term supply stability in harsh environments.

FAQ

What is the maximum bus clock frequency supported by the MC9S12DT256MFUE?

The MC9S12DT256MFUE supports a maximum bus clock frequency of 25 MHz, derived from its internal PLL operating up to 50 MHz core clock with 2× division. This timing is validated under rated operating conditions (−40°C to +85°C, VDD = 5.0 V ±10%) per Table A-16 in the Device User Guide V03.07. The MC9S12DT256MFUE achieves deterministic real-time response for CAN message handling and PWM updates within this constraint.

Does the MC9S12DT256MFUE include an on-chip voltage regulator?

Yes, the MC9S12DT256MFUE integrates an on-chip 5V voltage regulator controlled by the VREGEN pin. When VREGEN is asserted high, the regulator powers internal circuitry and can supply external loads up to 100 mA. Designers must connect the recommended 10 µF bypass capacitor between VDDA and VSSA per Table A-13. This feature reduces external component count in automotive and industrial applications where clean, regulated 5V is required.

How many CAN controllers does the MC9S12DT256MFUE support, and what protocols do they implement?

The MC9S12DT256MFUE supports three independent CAN controllers: CAN0, CAN1, and CAN4 - each implementing the full CAN 2.0B specification with identifier masking, message buffering, and bit-rate programmability up to 1 Mbit/s. These modules operate concurrently with dedicated message objects and receive/transmit buffers, enabling multi-bus vehicle network topologies without software arbitration overhead. This capability is confirmed in Table 0-1 and Section 18 of the MC9S12DT256 Device User Guide.

What package type and pin count does the MC9S12DT256MFUE use?

The MC9S12DT256MFUE uses an 80-pin Quad Flat Package (QFP) with 0.65 mm lead pitch, designated by the package code "FU" in NXP's ordering nomenclature. This variant is explicitly listed in Table 0-1 and Appendix B of the Device User Guide V03.07. The 80-pin QFP provides a compact footprint suitable for space-constrained automotive control units while maintaining full peripheral accessibility through dedicated and multiplexed I/O pins.

Is the MC9S12DT256MFUE pin-compatible with other members of the HCS12D family?

No, the MC9S12DT256MFUE is not universally pin-compatible across the HCS12D family. While it shares the same 80-pin QFP mechanical outline with MC9S12DJ256 and MC9S12DG256, functional pin assignments differ - notably, MC9S12DJ256 lacks CAN1 functionality and repurposes some pins for J1850 BDLC. Pin compatibility must be verified per device-specific signal tables (e.g., Section 2.1 and Figure 2-2), and register-level initialization sequences vary due to peripheral presence differences.