NXP Semiconductors MC9S12DT128BCPV

Overview

MC9S12DT128BCPV from Freescale Semiconductor is a 16-bit HCS12 microcontroller featuring 128 KB on-chip Flash EEPROM, 8 KB RAM, dual 10-bit 8-channel ADCs (ATD0/ATD1), 8-channel PWM, two SCI interfaces, one SPI, I²C, and MSCAN controller. It operates at up to 25 MHz bus clock via internal PLL, supports multiple low-power modes, and targets automotive body control modules requiring deterministic real-time response.

For engineers reviewing the MC9S12DT128BCPV datasheet, MC9S12DT128BCPV pinout, MC9S12DT128BCPV application, or MC9S12DT128BCPV equivalent, key selection criteria include its 112-pin LQFP package, dual ATD converters with ±1 µA input leakage, background debug interface (BKGD), and integrated voltage regulator enabling single-supply operation from 5 V.

Technical Context

The MC9S12DT128BCPV implements the HCS12 CPU core with 16-bit data path and 24-bit addressing, executing instructions in single-cycle (most) or two-cycle (indexed) timing. Its Clock and Reset Generator (CRG) block supports crystal, external clock, or Pierce oscillator inputs, with programmable PLL multiplication (×1 to ×32) and configurable XCLKS output for system synchronization.

Memory architecture includes 128 KB of user-programmable Flash (with 2 KB EEPROM emulation), 8 KB of SRAM, and memory-mapped peripheral registers across dedicated address ranges (e.g., $0034–$003F for CRG, $0080–$009F for ATD0). The device integrates dual 10-bit ATD converters with sample-and-hold, configurable conversion sequences, and hardware-triggered conversions via ETRIG0/ETRIG1 pins.

Key Specifications

Pinout & Package

MC9S12DT128BCPV is housed in a 112-pin Low-Profile Quad Flat Package (LQFP) with exposed thermal pad. Pin assignments follow Freescale's standardized HCS12 DT-series layout, supporting multiplexed I/O, dedicated analog inputs, and dual CAN transceiver interfaces.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC9S12DG128CPV, the MC9S12DT128BCPV adds BDLC and Byteflight support for legacy diagnostics and safety-critical sensor networks; versus S912XDP512J1MAL, it offers lower cost and power but lacks XGATE acceleration and extended memory - making it optimal for cost-sensitive, functionally fixed automotive ECUs.

Availability

MC9S12DT128BCPV is available at Aetrix Electronics and suitable for automotive body electronics, industrial motor control interfaces, and smart battery management systems requiring stable component supply, long-term lifecycle support, and AEC-Q100 qualified silicon.

Supply support for MC9S12DT128BCPV 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 global leader in automotive and industrial microcontrollers, known for robust HCS12 and S12X architectures designed for harsh environments.

The MC9S12DT128BCPV belongs to the HCS12 DT-series, engineered specifically for cost-effective, feature-rich automotive body electronics with integrated analog peripherals, CAN, and legacy diagnostic support.

FAQ

What is the maximum bus clock frequency supported by the MC9S12DT128BCPV?

The MC9S12DT128BCPV supports a maximum bus clock frequency of 25 MHz. This is achieved using the internal Phase-Locked Loop (PLL) with an external 4 MHz crystal (fOSC = 4 MHz) and PLL multiplier settings (N=8, P=1), yielding fBUS = 4 MHz × 8 = 32 MHz before division - then divided by 1.28 to meet specification limits. Verified electrical characteristics confirm stable operation up to 25 MHz under all specified temperature and voltage conditions.

Does the MC9S12DT128BCPV include an on-chip voltage regulator?

Yes, the MC9S12DT128BCPV integrates an on-chip voltage regulator (VREG) that generates a stable 2.5 V core supply from the main 5 V VDD input. Activation is controlled via the VREGEN pin; when pulled high, VREG powers the CPU core and internal logic, allowing single-supply operation without external regulators - a key design simplification for automotive body control modules.

How many analog-to-digital converter (ATD) modules does the MC9S12DT128BCPV have, and what are their specifications?

The MC9S12DT128BCPV features two independent 10-bit ATD converters: ATD0 and ATD1. Each supports 8 input channels, configurable sample times, hardware triggering (via ETRIG0/ETRIG1), and ±1 µA maximum input leakage current. Both operate over the full industrial temperature range and share common reference pins (VRH/VRL), enabling synchronized multi-sensor acquisition critical for motor control and battery monitoring.

What debug interface does the MC9S12DT128BCPV support, and how is it implemented?

The MC9S12DT128BCPV supports the Background Debug Mode (BDM) interface via the BKGD pin - a single-wire, half-duplex serial protocol compatible with standard Freescale BDM tools. It enables non-intrusive debugging, real-time register/memory inspection, flash programming, and breakpoint setting without requiring dedicated JTAG pins or halting peripheral operation - essential for validating timing-critical automotive firmware.

Which CAN controllers are integrated into the MC9S12DT128BCPV, and what versions do they support?

The MC9S12DT128BCPV integrates three MSCAN controllers: CAN0 (at $0140–$017F), CAN1 (at $0180–$01BF), and CAN4 (at $0280–$02BF). All are fully compliant with ISO 11898-1 (CAN 2.0A/B) and support both standard (11-bit) and extended (29-bit) identifiers, programmable bit timing, and 16-message buffer FIFOs - enabling multi-bus automotive networking for body, chassis, and diagnostic domains.