NXP Semiconductors MC9S12HZ256CAL

Overview

MC9S12HZ256CAL from NXP (formerly Freescale) is a 16-bit HCS12 microcontroller with 256 KB on-chip Flash, 12 KB RAM, and integrated motor control peripherals including dual 8-channel PWM modules, 10-bit 16-channel ADC, LCD controller (32×4), and MSCAN 2.0B interface. It operates at up to 25 MHz core frequency with PLL clock generation and supports automotive body electronics and industrial motor control applications.

For engineers reviewing the MC9S12HZ256CAL datasheet, MC9S12HZ256CAL pinout, MC9S12HZ256CAL application, or MC9S12HZ256CAL equivalent, key selection criteria include its integrated stepper stall detection (SSD), dual-output 3.3 V voltage regulator (VREG), background debug module (BDM), and qualification for automotive temperature range (–40°C to +125°C).

Technical Context

The MC9S12HZ256CAL implements the S12 CPU core with Harvard architecture, supporting byte- and word-addressable memory spaces. Its clock system integrates a PLL with programmable multiplication factor (up to ×32), crystal oscillator (1–8 MHz input), and multiple low-power modes (Wait, Stop, Pseudo-Stop) managed by the Clocks and Reset Generator (CRGV4) module.

Peripheral integration includes a dedicated Motor Controller (MC10B8CV1) supporting four independent motors with complementary PWM outputs, Stepper Stall Detector (SSDV1), and scalable CAN (MSCANV2) with message buffering and flexible filtering-enabling real-time closed-loop motor control without external logic.

Key Specifications

Pinout & Package

MC9S12HZ256CAL is housed in an 80-pin QFP package (JEDEC MS-026AC) with exposed thermal pad. Pin functions are defined per the device's signal description chapter (Section 1.4.1) and derivative-specific mapping in Appendix D of Rev. 2.05 datasheet.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC9S12HZ256CAL, S912XHZ256F0MLH delivers 2× CPU performance and LIN capability for cost-sensitive upgrades, while MC9S12XHZ512MAL offers doubled Flash/RAM for feature-rich applications-both retain identical motor control peripherals and AEC-Q100 qualification.

Availability

MC9S12HZ256CAL is available at Aetrix Electronics and suitable for automotive HVAC systems, industrial conveyor drives, medical infusion pumps, and smart power tools requiring stable component supply across extended product lifecycles.

Supply support for MC9S12HZ256CAL 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 microcontroller innovation dating to the Motorola 6800 family.

The HCS12 family-including MC9S12HZ256CAL-was designed specifically for cost-sensitive, high-reliability automotive body electronics and industrial motor control, emphasizing integrated analog/motor peripherals and AEC-Q100 compliance.

FAQ

What is the maximum operating frequency of the MC9S12HZ256CAL?

The MC9S12HZ256CAL supports a maximum bus frequency of 25 MHz, achieved using the on-chip PLL with programmable multiplication factor (e.g., ×20 from 1.25 MHz reference). Core execution remains synchronous to this bus clock, enabling deterministic timing for motor control loops. The MC9S12HZ256CAL datasheet specifies timing parameters only up to 25 MHz, and operation beyond this violates AC electrical specifications.

Does the MC9S12HZ256CAL include hardware-based stepper motor stall detection?

Yes, the MC9S12HZ256CAL integrates a dedicated Stepper Stall Detector (SSDV1) module that monitors back-EMF waveforms during stepper motor operation. It triggers an interrupt on stall condition without CPU involvement, providing sub-100 µs response-critical for medical and automotive safety applications. This function is explicitly documented in Chapter 10 of the MC9S12HZ256CAL datasheet.

What package type and pin count does the MC9S12HZ256CAL use?

The MC9S12HZ256CAL is packaged in an 80-pin Quad Flat Package (QFP) with 0.65 mm lead pitch and 14 mm × 14 mm body size (JEDEC MS-026AC). Pinout details-including port assignments, power pins, and peripheral signals-are fully specified in Section 1.4.1 ("Device Pinout") of the MC9S12HZ256CAL Rev. 2.05 datasheet.

Can the MC9S12HZ256CAL operate in automotive temperature ranges?

Yes, the MC9S12HZ256CAL is qualified for operation from –40°C to +125°C ambient temperature and meets AEC-Q100 Grade 2 reliability standards. This qualification is confirmed in Appendix A ("Electrical Characteristics") of the MC9S12HZ256CAL datasheet, where all DC and AC parameters are guaranteed across this full range.

What debug interface does the MC9S12HZ256CAL support?

The MC9S12HZ256CAL uses the Background Debug Module (BDMV4) accessed via the BKGD pin-a single-wire, non-intrusive interface supporting flash programming, real-time register inspection, and breakpoint execution. No JTAG port is present; BDM is the sole standardized debug method, and it requires no additional pins beyond BKGD and ground.