NXP Semiconductors MC9S12DG128CPV

Overview

MC9S12DG128CPV from NXP (formerly Freescale) is a 16-bit HCS12 microcontroller with 128 KB on-chip Flash, 8 KB RAM, and integrated CAN 2.0B controller. It operates at up to 25 MHz bus frequency, supports 5 V I/O, and features 10-bit ATD converter with 16 channels, 8-channel PWM, and background debug interface. It targets automotive body control modules requiring robust real-time control and CAN network integration.

For engineers reviewing the MC9S12DG128CPV datasheet, MC9S12DG128CPV pinout, MC9S12DG128CPV application, or MC9S12DG128CPV equivalent, key selection criteria include its 112-pin LQFP package, 5 V tolerant I/O, single CAN controller with dedicated pins PJ7/PJ6, PLL-based clock generation with external crystal support, and AEC-Q100 qualification for automotive use.

Technical Context

The MC9S12DG128CPV implements the HCS12 CPU core with 16-bit data path, 24-bit address space, and enhanced BDM for in-circuit debugging. Its CRG block integrates a PLL with programmable multiplication factor (1–32×), enabling stable bus clocks from 1–25 MHz using external crystals (1–8 MHz) or oscillators.

Peripheral integration includes MSCAN with full CAN 2.0B compliance, two asynchronous SCI modules, one synchronous SPI, I²C interface, 16-channel 10-bit ATD with configurable sample-and-hold, and 8-channel 8-bit PWM with center-aligned and edge-aligned modes - all mapped via MEBI and controlled through memory-mapped registers.

Key Specifications

Pinout & Package

The MC9S12DG128CPV is housed in an 112-pin Low-Profile Quad Flat Package (LQFP), thermally optimized for automotive under-hood environments with junction-to-board thermal resistance of 25°C/W.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC9S12DG128CPV, MC9S12DJ128CPV trades CAN for Byteflight safety interface - suitable for passive safety domains - while S912XDP512J0VLQ delivers significantly more memory and dual CAN but requires PCB redesign and toolchain migration.

Availability

MC9S12DG128CPV is available at Aetrix Electronics and suitable for automotive body electronics, industrial motor control, and embedded CAN gateway designs requiring stable component supply across extended product lifecycles.

Supply support for MC9S12DG128CPV 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 leader in automotive microcontrollers, secure connectivity, and power management ICs, with deep expertise in functional safety and ASIL-compliant design.

The MC9S12DG128CPV belongs to the HCS12 family, engineered specifically for cost-sensitive, high-reliability automotive applications such as body control, lighting, and comfort systems requiring CAN 2.0B and AEC-Q100 Grade 2 operation.

FAQ

What is the maximum bus frequency supported by the MC9S12DG128CPV?

The MC9S12DG128CPV supports a maximum bus frequency of 25 MHz, achieved via its on-chip PLL with programmable multiplication factor (1–32×) and external crystal input (1–8 MHz). This frequency defines the timing base for all peripherals including MSCAN, ATD, and PWM modules. The PLL lock time and stability are specified in the CRG section of the device user guide, and operation above 25 MHz violates absolute maximum ratings.

Does the MC9S12DG128CPV include a built-in CAN controller?

Yes, the MC9S12DG128CPV integrates one fully compliant MSCAN module supporting CAN 2.0B protocol with dedicated TXCAN0 and RXCAN0 pins (PJ7 and PJ6). It supports bit rates up to 1 Mbps, message filtering, and automatic retransmission. External CAN transceivers (e.g., TJA1040 or SN65HVD230) are required for physical layer interfacing, and the MCU handles protocol stack processing in firmware.

What package type and pin count does the MC9S12DG128CPV use?

The MC9S12DG128CPV uses a 112-pin LQFP package (case number 987, 16 × 16 mm, 0.4 mm pitch), RoHS-compliant and available in lead-free PVE variant. Pin assignments are documented in Figure 2-1 of the Device User Guide, covering all signal functions including I/O ports, power supplies, oscillator, BDM, and CAN interfaces. Thermal resistance is characterized at 25°C/W junction-to-board.

Is the MC9S12DG128CPV qualified for automotive applications?

Yes, the MC9S12DG128CPV is AEC-Q100 qualified for Grade 2 operation (−40°C to +105°C ambient temperature), making it suitable for under-hood and cabin automotive applications. It meets requirements for electrostatic discharge (HBM ≥ 2 kV), latch-up immunity, and long-term reliability under thermal cycling and humidity stress - verified per AEC-Q100 Rev G test plan.

How is flash memory secured on the MC9S12DG128CPV?

Flash security on the MC9S12DG128CPV is implemented via ROMCTL register and a 2-bit backdoor key mechanism. When secured, the Flash cannot be read or programmed externally via BDM unless the correct key sequence is written to specific memory locations during reset. Unsecuring requires mass erase, which clears all Flash and EEPROM contents. Security behavior is detailed in Section 4.3 of the Device User Guide.