NXP Semiconductors MCHC912B32VFUE8

Overview

MCHC912B32VFUE8 from NXP Semiconductors (formerly Freescale) is a 16-bit HCS12 microcontroller featuring 32 KB on-chip FLASH EEPROM, 1 KB RAM, and integrated CAN 2.0A/B controller, PWM, ATD converter, and BDM debug interface. It operates at up to 25 MHz bus frequency with 5V supply and supports single-chip, expanded, and background debug modes for automotive and industrial control applications.

For engineers reviewing the MCHC912B32VFUE8 datasheet, MCHC912B32VFUE8 pinout, MCHC912B32VFUE8 application, or MCHC912B32VFUE8 equivalent, this page delivers verified electrical specs, package mapping (QFP-80), functional block integration, and real-world use context - including CAN-based vehicle subsystems, motor control timing, and embedded diagnostics requiring nonvolatile program storage and real-time interrupt handling.

Technical Context

The MCHC912B32VFUE8 implements the M68HC12B CPU core with 16-bit data/24-bit address bus, supporting indexed, auto-increment/decrement, and relative addressing modes. Its memory map includes 32 KB FLASH (with block protection), 1 KB RAM, and optional ROM boot loader space.

Integrated peripherals include an 8-channel 10-bit ATD converter (0–5 V input range), 8-channel PWM with independent period/duty registers, and a fully compliant msCAN12 controller with message buffers, acceptance filtering, and loopback test mode - all synchronized to the internal CGM clock tree with programmable prescalers and COP watchdog.

Key Specifications

Pinout & Package

Package: 80-pin Quad Flat Package (QFP), 14 × 14 mm body, 0.65 mm pitch, lead-free (Pb-free) and RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCHC912B32VFUE8, both alternatives offer significantly larger memory and extended peripheral sets but require PCB layout changes due to different QFP-112 or LQFP-144 packages and updated power sequencing - making them suitable for next-generation designs rather than drop-in replacements.

Availability

MCHC912B32VFUE8 is available at Aetrix Electronics and suitable for automotive body electronics, industrial motor drives, off-highway telematics, and commercial HVAC control systems requiring stable component supply across long production lifecycles.

Supply support for MCHC912B32VFUE8 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 applications, with roots in Freescale's HCS12 legacy portfolio.

The MCHC912B32VFUE8 belongs to the HCS12B microcontroller family, designed specifically for cost-sensitive, real-time embedded control in harsh environments where CAN communication, deterministic timing, and field-programmable FLASH are essential.

FAQ

What is the maximum operating frequency of the MCHC912B32VFUE8?

The MCHC912B32VFUE8 supports a maximum bus frequency of 25 MHz, achieved using the internal PLL with an external 4–8 MHz crystal on XTAL/EXTAL. This yields a 50 MHz core clock, enabling fast instruction execution and real-time response in time-critical applications such as motor control and CAN messaging.

Does the MCHC912B32VFUE8 include a CAN controller?

Yes, the MCHC912B32VFUE8 integrates the msCAN12 controller, which is fully compliant with ISO 11898-1 (CAN 2.0A/B). It supports bit rates up to 1 Mbit/s, 15 message buffers, hardware acceptance filtering, and loopback self-test mode - eliminating the need for an external CAN controller in most automotive and industrial implementations.

How much FLASH and RAM does the MCHC912B32VFUE8 have?

The MCHC912B32VFUE8 contains 32 KB of on-chip FLASH EEPROM for program storage and 1 KB of on-chip static RAM. The FLASH supports 100,000 write/erase cycles and includes hardware block protection; the RAM retains data in Wait and Stop low-power modes.

What debug interface does the MCHC912B32VFUE8 support?

The MCHC912B32VFUE8 supports Background Debug Mode (BDM) via the BKGD pin - a single-wire serial interface that enables in-circuit programming, real-time register inspection, breakpoint setting, and flash erase without requiring external emulators or ICE hardware.

Is the MCHC912B32VFUE8 pin-compatible with other HCS12 devices?

No, the MCHC912B32VFUE8 is not pin-compatible with other HCS12 variants such as the MC912B12 or MC912B24 due to differences in peripheral mapping, pin function allocation, and package size (80-pin QFP vs. 52-pin or 64-pin variants); migration requires PCB redesign and firmware adaptation.