NXP Semiconductors MC9S12H256VFVER

Overview

MC9S12H256VFVER from NXP (formerly Freescale) is a 16-bit HCS12 microcontroller with 256 KB on-chip Flash EEPROM, 12 KB RAM, and integrated CAN 2.0B controllers, PWM motor control modules, and 10-bit ATD converter. It operates at up to 50 MHz bus clock, supports external memory expansion via multiplexed 16-bit address/data bus, and targets automotive body control, industrial motor drives, and embedded real-time systems requiring deterministic interrupt response and robust I/O.

For engineers reviewing the MC9S12H256VFVER datasheet, MC9S12H256VFVER pinout, MC9S12H256VFVER application, or MC9S12H256VFVER equivalent, key selection criteria include its dual CAN interface support, 112-pin LQFP package with dedicated motor control I/O, Flash endurance of 10k write/erase cycles, and compatibility with HCS12 development tools including CodeWarrior and P&E Micro debuggers.

Technical Context

The MC9S12H256VFVER implements the HCS12 CPU12 core with 16-bit data path, 24-bit addressing, and instruction set backward-compatible with HC12. Its Clock and Reset Generator (CRG) block supports crystal, external clock, or self-clock modes with PLL multiplication up to 50 MHz bus frequency, and includes clock monitor failure detection.

System integration includes two MSCAN modules (CAN 2.0B compliant), 8-channel 10-bit ATD with 16 input channels, 8-channel PWM with dead-time insertion, LCD driver supporting up to 32×4 segments, and voltage regulator for internal 2.5 V core supply. All peripherals are memory-mapped and accessible via standard HCS12 register interface.

Key Specifications

Pinout & Package

MC9S12H256VFVER is housed in a 112-pin LQFP package (case no. 987), thermally optimized for industrial temperature range operation (–40°C to +105°C) and compatible with standard reflow soldering profiles.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC9S12XEP100MALR and S912XEQ512J2MAG, the MC9S12H256VFVER delivers optimal balance of dual CAN, motor control PWM, and compact 112-pin footprint for cost-sensitive automotive and industrial motion control designs where external LCD display is required.

Availability

MC9S12H256VFVER is available at Aetrix Electronics and suitable for automotive body electronics, industrial motor drives, embedded PLC I/O modules, and medical infusion pump controllers requiring stable component supply across extended product lifecycles.

Supply support for MC9S12H256VFVER 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 specializing in secure connectivity solutions for automotive, industrial, and IoT applications, with deep heritage in microcontroller innovation dating back to Motorola and Freescale.

The MC9S12H256VFVER belongs to the HCS12 family, designed specifically for deterministic real-time control in harsh environments-emphasizing CAN networking, motor actuation, and functional safety readiness for automotive and industrial markets.

FAQ

What is the maximum bus clock frequency supported by the MC9S12H256VFVER?

The MC9S12H256VFVER supports a maximum bus clock frequency of 50 MHz, achieved via its internal Phase-Locked Loop (PLL) operating from an external crystal or oscillator input. This frequency enables sub-10 µs interrupt latency and real-time execution of control algorithms critical for motor and automotive applications. The PLL configuration is fully programmable through CRG registers, and stability is verified across the full industrial temperature range (–40°C to +105°C).

Does the MC9S12H256VFVER include hardware security features?

Yes, the MC9S12H256VFVER includes Flash security lock functionality that prevents unauthorized read-out of program memory. When enabled, the security byte blocks background debug access and Flash read operations while still permitting secure firmware updates via a protected bootloader. This feature meets basic requirements for IP protection in automotive and industrial deployments, though it does not provide cryptographic acceleration or secure boot verification beyond the Flash lock mechanism.

How many CAN interfaces does the MC9S12H256VFVER integrate, and are they fully compliant?

The MC9S12H256VFVER integrates two independent MSCAN modules compliant with ISO 11898-1 (CAN 2.0B Active). Each supports full CAN protocol features including identifier masking, message buffering, error frame generation, and automatic retransmission. Both CAN controllers operate concurrently and share no hardware resources, enabling true dual-network operation for applications such as chassis diagnostics and body control domain separation.

What type of analog-to-digital converter is included in the MC9S12H256VFVER?

The MC9S12H256VFVER includes a 10-bit Analog-to-Digital Converter (ATD) module with 16 input channels, configurable sample-and-hold time, and ±1 LSB integral nonlinearity. It supports both single-ended and differential input modes, programmable conversion sequences, and hardware-triggered sampling synchronized to PWM or timer events-making it suitable for current sensing, temperature monitoring, and closed-loop feedback in motor control systems.

Is the MC9S12H256VFVER pin-compatible with other HCS12 devices?

No, the MC9S12H256VFVER is not pin-compatible with other HCS12 devices outside its immediate VFVER variant group. While it shares the 112-pin LQFP package with MC9S12H128, differences in peripheral mapping (e.g., LCD driver pins, motor control I/O assignments) and memory configuration prevent drop-in replacement. Board-level compatibility requires verification against the specific pin assignment table in the MC9S12H256 Device User Guide (V01.20), Figure 2-1.