NXP Semiconductors MC9S12DG128BCPV

Overview

MC9S12DG128BCPV from Freescale Semiconductor is a 16-bit HCS12 microcontroller with 128 KB on-chip Flash EEPROM, 8 KB RAM, dual 10-bit 8-channel ADCs, 8-channel PWM, 3 CAN modules (MSCAN), and an integrated voltage regulator. It operates at up to 25 MHz bus clock via internal PLL, supports background debug mode (BDM), and targets automotive body control, engine management, and industrial embedded systems.

For engineers reviewing the MC9S12DG128BCPV datasheet, MC9S12DG128BCPV pinout, MC9S12DG128BCPV application, or MC9S12DG128BCPV equivalent, this page delivers verified electrical specs, package mapping, functional block context, and real-world use cases aligned with Freescale's documented derivative coverage and electrical characterization.

Technical Context

The MC9S12DG128BCPV implements the HCS12 CPU core with 16-bit data path, Harvard architecture, and 24-bit addressing. Its Clock and Reset Generator (CRG) supports crystal, external clock, or Pierce oscillator inputs, with programmable PLL multiplication (×1 to ×32) and configurable loop filter for jitter control.

Memory subsystem includes 128 KB Flash organized in 2-KB sectors with 100K erase/write cycles, 2 KB EEPROM with 100K endurance, and 8 KB SRAM. Peripheral integration covers dual ATD converters (10-bit, 8-channel each), 3 independent MSCAN controllers (CAN 2.0A/B compliant), SPI, SCI, IIC, J1850 BDLC, Byteflight, and enhanced capture timer (ECT) with input capture/output compare capabilities.

Key Specifications

Pinout & Package

MC9S12DG128BCPV is housed in an 80-pin QFP package (case number 987), with thermal pad exposed on underside for enhanced heat dissipation in automotive under-hood environments.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC9S12DJ128CPV, MC9S12DG128BCPV adds full CAN1 support and Byteflight for advanced driver assistance interconnect; versus S912XDP512J0VLH, it offers proven qualification for legacy automotive platforms but lacks XGATE acceleration and larger memory footprint.

Availability

MC9S12DG128BCPV is available at Aetrix Electronics and suitable for engine control units, body control modules, and industrial motor drive controllers requiring stable component supply across extended product lifecycles.

Supply support for MC9S12DG128BCPV 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 MC9S12DG128BCPV belongs to the HCS12 family, designed specifically for automotive electronic control units requiring high reliability, on-chip Flash reprogrammability, and integrated communication peripherals including CAN and J1850.

FAQ

What is the maximum bus clock frequency supported by the MC9S12DG128BCPV?

The MC9S12DG128BCPV supports a maximum bus clock frequency of 25 MHz. This is achieved using the internal Phase-Locked Loop (PLL) with a base oscillator frequency of 4 MHz and a programmable multiplication factor up to ×32. The PLL output feeds the system clock divider to generate the final bus clock, and timing specifications in the Electrical Characteristics section confirm stable operation at 25 MHz under specified voltage and temperature conditions.

Does the MC9S12DG128BCPV include an on-chip voltage regulator?

Yes, the MC9S12DG128BCPV integrates an on-chip voltage regulator that generates a stable 2.5 V supply for the core logic. The regulator is enabled via the VREGEN pin, which must be asserted high. Input is supplied through VDDR (4.5–5.5 V), and output is delivered to VDD1/VDD2. This eliminates the need for an external core regulator in many automotive applications, simplifying power design and reducing bill-of-materials cost.

How many CAN controllers does the MC9S12DG128BCPV feature, and what standards do they support?

The MC9S12DG128BCPV features three independent MSCAN controllers: CAN0, CAN1, and CAN4. All comply with the ISO 11898-1 standard for CAN 2.0A/B protocols, supporting both standard (11-bit) and extended (29-bit) identifiers, message filtering, and error confinement. Each controller has dedicated message buffers and status registers, enabling concurrent operation on separate CAN networks without software arbitration overhead.

What debugging interface is supported by the MC9S12DG128BCPV?

The MC9S12DG128BCPV supports Background Debug Mode (BDM) via the BKGD pin. This single-wire interface enables full-speed in-circuit debugging, flash programming, and real-time memory inspection without halting CPU execution. BDM is compatible with standard Freescale BDM tools such as the USB-ML-12 and CodeWarrior development environment, and requires no additional pins beyond BKGD and ground.

Is the MC9S12DG128BCPV pin-compatible with other members of the HCS12 family?

The MC9S12DG128BCPV shares the same 80-pin QFP package and pin assignment with MC9S12DJ128B and MC9S12DB128B, as confirmed in Figure 2-2 of the Device User Guide. However, functional differences exist - notably, MC9S12DG128BCPV includes CAN1 and Byteflight blocks absent in DJ128, while DB128 omits CAN entirely. Pin compatibility enables PCB reuse only when peripheral requirements align across derivatives.