NXP Semiconductors MC912DT128AVPVE

Overview

MC912DT128AVPVE from Freescale Semiconductor is a 16-bit HCS12 microcontroller featuring 128 KB on-chip flash memory, 4 KB RAM, and integrated MSCAN controller for automotive CAN bus communication. It operates at up to 25 MHz core frequency with a PLL-based clock system, supports 10-bit ADC (8 channels), PWM (8 channels), and enhanced capture timer - deployed in engine control units and body electronics modules.

For engineers reviewing the MC912DT128AVPVE datasheet, MC912DT128AVPVE pinout, MC912DT128AVPVE application, or MC912DT128AVPVE equivalent, key selection criteria include CAN 2.0A/B compliance, 112-pin QFP package compatibility, flash EEPROM endurance (10k write/erase cycles), BDM debug interface support, and operating temperature range (–40°C to +105°C) for under-hood automotive use.

Technical Context

The MC912DT128AVPVE implements the HCS12 CPU core derived from the Motorola 68HC12 architecture, executing instructions in single-cycle mode for most operations. Its clock system integrates a phase-locked loop (PLL) with programmable multiplication factor (1–32×) and multiple clock sources including external crystal (4–8 MHz), ceramic resonator, or RC oscillator.

It embeds a fully compliant MSCAN 2.0B controller supporting both standard and extended identifiers, with 16 message buffers, programmable acceptance filtering, and automatic retransmission. The analog subsystem includes two independent 10-bit, 8-channel ATD converters with configurable sample-and-hold timing and conversion triggers from ECT or PWM events.

Key Specifications

Pinout & Package

MC912DT128AVPVE is housed in a 112-pin LQFP (Low-profile Quad Flat Package), case number 987, with 0.4 mm lead pitch and 20 mm × 20 mm body size. Pin assignments follow the standardized HCS12 DT-series layout defined in Section 3.2 of the Rev. 4.0 technical data manual.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC912DT128AVPVE, MC9S12XDP512 delivers double the flash and co-processor acceleration for complex control laws, while S912XEQ512J2MAG offers certified automotive reliability and backward-compatible pinout - both require PCB redesign due to different package footprints and voltage regulator requirements.

Availability

MC912DT128AVPVE is available at Aetrix Electronics and suitable for automotive engine control, body electronics, and transmission management applications requiring stable component supply across extended product lifecycles.

Supply support for MC912DT128AVPVE 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) was a leading designer of embedded processors and analog devices for automotive, industrial, and networking markets.

The MC912DT128AVPVE belongs to the HCS12 DT-series microcontrollers, engineered specifically for cost-sensitive, high-reliability automotive applications requiring CAN connectivity, analog sensing, and real-time control capabilities.

FAQ

What is the maximum operating frequency of the MC912DT128AVPVE?

The MC912DT128AVPVE achieves a maximum core frequency of 25 MHz using its internal PLL, which multiplies an external 4–8 MHz crystal input by a programmable factor (1–32×). This frequency is sustained across the full –40°C to +105°C operating range, with timing validated per Section 21.3 of the Rev. 4.0 datasheet. The MC912DT128AVPVE's bus clock runs at half-core frequency (12.5 MHz) unless configured otherwise via clock divider registers.

Does the MC912DT128AVPVE support CAN FD or only classical CAN?

The MC912DT128AVPVE implements the MSCAN module compliant with ISO 11898-1:2003, supporting only Classical CAN (CAN 2.0A/B) at up to 1 Mbps. It does not support CAN FD features such as flexible data-rate, extended data length, or CRC enhancements. For CAN FD functionality, designers must select newer derivatives like the S32K1xx series. The MC912DT128AVPVE's MSCAN remains fully interoperable with legacy automotive networks.

How many analog-to-digital converter channels does the MC912DT128AVPVE have?

The MC912DT128AVPVE integrates two independent 10-bit analog-to-digital converters (ATD0 and ATD1), each supporting up to 8 analog input channels - for a total of 16 configurable analog inputs. Channel selection, sample time, and conversion triggers are controlled via dedicated ATD registers (ATD0CTL0–ATD0CTL5 and ATD1CTL0–ATD1CTL5), with simultaneous sampling possible only within each module, not across modules.

Is the MC912DT128AVPVE pin-compatible with the MC912DT128CPVE?

No, the MC912DT128AVPVE is not pin-compatible with the MC912DT128CPVE. While both share the same 112-pin QFP package, the 'A' suffix denotes the DT128A variant with Colpitts oscillator circuitry optimized for crystal operation, whereas the 'C' suffix indicates the DT128C variant with modified oscillator design for ceramic resonator use. Their XTAL/EXTAL pin electrical characteristics and internal biasing differ, requiring distinct external components and layout adjustments.

What debug interface does the MC912DT128AVPVE provide?

The MC912DT128AVPVE features a single-wire Background Debug Mode (BDM) interface accessible via the BKGD pin. This interface supports non-intrusive real-time debugging, flash programming, register inspection, and breakpoint execution without requiring dedicated JTAG pins. BDM communication uses asynchronous serial protocol at 115.2 kbps, and requires a compatible BDM pod (e.g., P&E Micro Cyclone) - no SWD or JTAG support is present in the MC912DT128AVPVE.