NXP Semiconductors MC9S12E256CPVE

Overview

MC9S12E256CPVE from NXP (formerly Freescale) is a 16-bit HCS12 microcontroller featuring 256 KB on-chip Flash, 12 KB RAM, and integrated peripherals including 10-bit 16-channel ADC, dual 8-bit DACs, 8-channel PWM with fault protection, multiple serial interfaces (SCI, SPI, I²C), and a PLL-based clock system. It operates at up to 50 MHz core frequency and targets automotive body control, industrial sensor nodes, and embedded motor control systems.

For engineers reviewing the MC9S12E256CPVE datasheet, MC9S12E256CPVE pinout, MC9S12E256CPVE application, or MC9S12E256CPVE equivalent, key selection criteria include Flash size scalability within the S12E family, compatibility with legacy S12 code bases, support for background debug via BDM, and qualification for extended temperature operation (–40°C to +105°C) in automotive-grade packages.

Technical Context

The MC9S12E256CPVE implements the HCS12 CPU12 core with 16-bit data path, 24-bit addressing, and instruction set backward compatibility with HC12. Its memory subsystem includes 256 KB of single-cycle Flash with EEPROM emulation capability and 12 KB of SRAM, both accessible via the multiplexed external bus interface (MEBI).

Peripherals are tightly integrated via the Port Integration Module (PIM), enabling flexible pin mapping for ADC inputs (AN[15:0]), PWM outputs (PW0[5:0], PW1[5:0]), serial communication (SCI0/1/2, SPI, I²C), and timer capture/compare functions (TIM16B4CV1). The Clocks and Reset Generator (CRGV4) supports multiple clock sources - crystal, external clock, or internal RC - with PLL multiplication up to 50 MHz and built-in clock monitor for fail-safe operation.

Key Specifications

Pinout & Package

MC9S12E256CPVE is housed in a 112-pin LQFP (Low-Profile Quad Flat Package) with 0.4 mm pitch, RoHS-compliant, and moisture sensitivity level (MSL) 3. The package provides dedicated power/ground pairs per I/O bank and separate analog/digital supply domains (VDDA/VSSA, VDDX/VSSX, VDDR/VSSR).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC9S12E128CPVE, the MC9S12E256CPVE delivers double Flash/RAM and adds a second DAC channel while retaining full software and pin compatibility; versus S912ZVL64F0MLC, it offers larger memory and mature toolchain support but lacks CAN FD and modern safety features.

Availability

MC9S12E256CPVE is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor nodes, motor control systems, and diagnostic tools requiring stable component supply across long production lifecycles.

Supply support for MC9S12E256CPVE 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 microcontroller heritage.

The HCS12 family-including MC9S12E256CPVE-was designed for cost-effective, high-reliability embedded control in automotive body electronics and industrial automation where deterministic real-time performance and long-term supply stability are critical.

FAQ

What is the maximum operating frequency of the MC9S12E256CPVE?

The MC9S12E256CPVE achieves a maximum core frequency of 50 MHz using its internal PLL, which multiplies an external crystal or oscillator input (typically 4–8 MHz) by programmable factors. This frequency is sustained across the full –40°C to +105°C temperature range and 4.5–5.5 V supply voltage, as validated in the device's electrical characteristics table.

Does the MC9S12E256CPVE support in-circuit debugging?

Yes, the MC9S12E256CPVE integrates the Background Debug Module (BDMV4), enabling single-wire in-circuit debugging via standard BDM interfaces. This allows full visibility into registers and memory, flash programming, and breakpoint execution without requiring additional JTAG hardware or halting peripheral operation.

How many serial communication interfaces does the MC9S12E256CPVE include?

The MC9S12E256CPVE includes three independent Serial Communication Interfaces (SCI0, SCI1, SCI2), one Serial Peripheral Interface (SPI), and one Inter-Integrated Circuit (I²C) module. All are accessible through multiplexed pins on Ports S, M, and P, with configurable baud rates and framing options per channel.

Is the MC9S12E256CPVE pin-compatible with other S12E family members?

Yes, the MC9S12E256CPVE shares the same 112-pin LQFP package and pinout with MC9S12E128CPVE and MC9S12E64CPVE, enabling direct PCB reuse across memory variants. Pin functions-including ADC inputs, PWM outputs, and serial interfaces-are identically mapped, simplifying hardware design scaling.

What analog peripherals are integrated into the MC9S12E256CPVE?

The MC9S12E256CPVE integrates a 10-bit 16-channel Analog-to-Digital Converter (ATD10B16CV2) with external trigger capability and two independent 8-bit Digital-to-Analog Converters (DAC8B1CV1), each with dedicated output pins (DAO1, DAO2) and reference voltage inputs (VREF, VRL).