NXP Semiconductors MCF51AC128CVFUE

Overview

MCF51AC128CVFUE from NXP Semiconductors (formerly Freescale) is a 32-bit ColdFire V1 microcontroller designed for industrial control and automotive subsystems. It operates at up to 50.33 MHz, integrates 128 KB flash and 16 KB SRAM, features dual analog comparators, a 12-bit 20-channel ADC, two SPI interfaces (one with 16-bit FIFO), and CAN protocol support disabled. It targets motor control firmware and sensor interface modules requiring deterministic real-time response.

For engineers reviewing the MCF51AC128CVFUE datasheet, MCF51AC128CVFUE pinout, MCF51AC128CVFUE application, or MCF51AC128CVFUE equivalent, key selection criteria include its 64-pin QFP package, CAN-disabled configuration, 16 KB RAM allocation, FTM/TPM timer architecture, and compatibility with ColdFire V1 toolchains and BDM debugging.

Technical Context

The MCF51AC128CVFUE implements the ColdFire V1 core with ISA_C instruction set, delivering 0.76 DMIPS/MHz when executing from flash. Its memory subsystem includes 128 KB on-chip flash with block protection and 16 KB SRAM-specifically configured for CAN-disabled variants per Table 1 of the datasheet.

Peripheral integration centers on deterministic timing: two flexible timer modules (FTM1 with 4 channels, FTM2 with 2 channels), one TPM3 module (2 channels), CRC hardware accelerator, and dual analog comparators with internal bandgap reference option. The device lacks CAN transceiver circuitry and associated pins (TxCAN/RxCAN), confirmed by Figure 3 pinout and Table 1 feature matrix.

Key Specifications

Pinout & Package

Package: 64-pin QFP, 14 mm × 14 mm body, 0.8 mm pitch, lead-free (RoHS-compliant). Pinout conforms to Figure 3 in Rev.7 datasheet; TxCAN (PTA0) and RxCAN (PTA1) pins are unconnected and functionally absent.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCF51AC128CVFUE, the KE02Z64VQH2 offers ARM ecosystem advantages but sacrifices deterministic timer features and debug visibility; the MCF51JM128VLF provides identical core functionality in LQFP but omits SPI2 FIFO-critical for high-bandwidth sensor streaming.

Availability

MCF51AC128CVFUE is available at Aetrix Electronics and suitable for industrial motor control, automotive body electronics, sensor fusion nodes, and PLC I/O modules requiring stable component supply across extended temperature ranges.

Supply support for MCF51AC128CVFUE 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.

The ColdFire family-including MCF51AC128CVFUE-was engineered for deterministic real-time control in resource-constrained embedded systems, emphasizing debug visibility, low-power operation, and mixed-signal integration.

FAQ

What is the maximum operating frequency of the MCF51AC128CVFUE?

The MCF51AC128CVFUE operates at a maximum core frequency of 50.33 MHz across its full voltage range (2.7 V to 5.5 V), as specified in Section 1.3.1 of the Rev.7 datasheet. This frequency enables deterministic real-time execution with sub-20 ns instruction cycles, critical for motor control and sensor sampling applications requiring tight timing budgets. The MCF51AC128CVFUE achieves this using the ColdFire V1 core's optimized pipeline and on-chip MCG clock generator.

Does the MCF51AC128CVFUE include a CAN controller?

No, the MCF51AC128CVFUE does not include a CAN controller. The "C" suffix in the part number explicitly denotes the CAN-disabled variant, confirmed by Table 1 (Device Comparison) and Figure 3 pinout, where PTA0/TxCAN and PTA1/RxCAN pins are marked as unavailable. The MCF51AC128CVFUE retains all other peripherals-including SCI, IIC, SPI, and timers-but excludes CAN protocol logic, registers, and associated interrupt resources.

What is the SRAM size allocated to the MCF51AC128CVFUE?

The MCF51AC128CVFUE integrates 16 KB of on-chip static RAM, as documented in Table 1 (Device Comparison) and the Orderable Part Number Summary (Table 3). This allocation is specific to the "C" variant (MCF51AC128C) and differs from the 32 KB SRAM in CAN-enabled MCF51AC128A devices. The 16 KB SRAM supports real-time stack, heap, and peripheral buffer requirements for industrial control firmware without external memory.

Which package type is used for the MCF51AC128CVFUE?

The MCF51AC128CVFUE uses a 64-pin QFP package with 14 mm × 14 mm body dimensions and 0.8 mm lead pitch, as stated in Table 3 (Orderable Part Number Summary) and illustrated in Figure 3 of the Rev.7 datasheet. This QFP variant is distinct from LQFP versions (e.g., MCF51AC128CVPUE) and shares pin compatibility with other 64-pin ColdFire derivatives, though CAN-related pins remain unconnected.

How does the MCF51AC128CVFUE support real-time debugging?

The MCF51AC128CVFUE supports real-time debugging via its single-wire Background Debug Mode (BDM) interface (BKGD/MS pin) and integrated Debug Visibility Bus (VBUS). The on-chip trace buffer enables programmable start/stop conditions and PC-profiling modes, while six hardware breakpoints-including four PC-based and one address-pair-allow precise code inspection. This infrastructure is fully operational in the MCF51AC128CVFUE, independent of CAN functionality.