NXP Semiconductors XC68C812A4PVE5

Overview

XC68C812A4PVE5 from NXP Semiconductors (formerly Freescale) is a 16-bit HCS12 microcontroller featuring 128 KB on-chip FLASH, 8 KB RAM, and integrated EEPROM. It includes a 16-bit CPU12 core, 8-channel 10-bit ATD converter, dual SCI, SPI, MSI, and a standard timer module with input capture/output compare. Used in automotive body control modules requiring deterministic real-time response.

For engineers reviewing the XC68C812A4PVE5 datasheet, XC68C812A4PVE5 pinout, XC68C812A4PVE5 application, or XC68C812A4PVE5 equivalent, key selection criteria include its 8 MHz bus frequency, 5V operation, single-chip mode support, and compatibility with legacy M68HC12 development tools and code base.

Technical Context

The XC68C812A4PVE5 implements the CPU12 instruction set architecture with 16-bit data and address paths, supporting both expanded wide and narrow memory modes. Its clock system integrates a PLL for bus frequency multiplication and includes COP watchdog, real-time interrupt, and clock monitor reset functions.

Peripheral resources are mapped via dedicated I/O ports (Ports A–J), with configurable data direction, pull-up control, and key wakeup capability on Ports D, H, and J. Memory expansion is supported through chip-select logic with programmable timing and window definition registers.

Key Specifications

Pinout & Package

XC68C812A4PVE5 is housed in a 112-pin LQFP (16 × 16 mm, 0.4 mm pitch) package with exposed thermal pad. Pin assignments follow the standard HCS12 112-pin footprint defined in Freescale Document MC68HC812A4 Rev. 7.

Key Features

Applications

Equivalent & Alternatives

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

Compared with XC68C812A4PVE5, MC9S12XDP512 offers scalable compute headroom for future feature expansion, while S912XEQ512J2 provides guaranteed automotive-grade reliability without architectural change - making it ideal for production ramp of existing HCS12-based platforms.

Availability

XC68C812A4PVE5 is available at Aetrix Electronics and suitable for automotive body electronics, industrial motor control, and smart power distribution systems requiring stable component supply and long-term lifecycle support.

Supply support for XC68C812A4PVE5 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 roots in Freescale's HCS12 microcontroller lineage.

The XC68C812A4PVE5 belongs to the legacy HCS12 family designed specifically for cost-sensitive, real-time automotive control applications where deterministic timing, EEPROM integration, and BDM debug capability are essential.

FAQ

What is the maximum operating frequency of the XC68C812A4PVE5?

The XC68C812A4PVE5 supports a maximum bus frequency of 8 MHz (E-clock), achieved via its internal PLL using an external 4–8 MHz crystal. The PLL allows multiplication of the reference clock by integer factors (e.g., 2×, 4×) to reach the target bus speed while maintaining stable phase alignment and low jitter - critical for timing-critical automotive functions executed by the XC68C812A4PVE5.

Does the XC68C812A4PVE5 support CAN communication?

The XC68C812A4PVE5 does not integrate a native CAN controller. However, Port E pins can be configured for CAN-compatible signal levels and timing, allowing external CAN transceivers to interface via GPIO or SCI emulation. For full CAN 2.0B support, NXP recommends migrating to the MC9S12XDP512 or S912XEQ512J2 - both pin-compatible upgrades that retain XC68C812A4PVE5 firmware structure where possible.

How is EEPROM managed in the XC68C812A4PVE5?

The XC68C812A4PVE5 includes 4 KB of on-chip EEPROM organized in 64-byte sectors, controlled via dedicated EEPROM Module Configuration, Block Protect, and Programming Registers. Erase and program operations are initiated by firmware writing specific command sequences, with status flags indicating completion. This EEPROM is used by the XC68C812A4PVE5 to store calibration data, fault logs, and user settings persistently across power cycles.

What debug interface does the XC68C812A4PVE5 use?

The XC68C812A4PVE5 uses the Background Debug Mode (BDM) interface, a single-wire serial protocol implemented in hardware. It enables full read/write access to CPU registers, memory, and peripheral registers during runtime or halted states, supports breakpoints and step-through debugging, and allows in-circuit FLASH programming - all without requiring external JTAG hardware. This BDM interface is fully supported by CodeWarrior IDE for the XC68C812A4PVE5.

Is the XC68C812A4PVE5 RoHS compliant?

Yes, the XC68C812A4PVE5 is RoHS compliant and lead-free, meeting EU Directive 2011/65/EU requirements. The "PVE5" suffix denotes the 112-pin LQFP package with green molding compound and matte tin lead finish. Full compliance documentation, including substance declarations and test reports, is available from NXP for the XC68C812A4PVE5 upon request.