NXP Semiconductors MCF5249VF140

Overview

MCF5249VF140 from Freescale Semiconductor is a 32-bit ColdFire V2 microprocessor designed as a system controller/decoder for portable MP3 CD players, integrating a 140 MHz CPU core, 96 KB on-chip SRAM (64 KB + 32 KB banks), EMAC unit for signal processing, and hardware CD-ROM XA decoder. It operates at 1.8 V core / 3.3 V I/O and targets low-power audio playback systems requiring <20 MHz CPU bandwidth for MP3 decode.

For engineers reviewing the MCF5249VF140 datasheet, MCF5249VF140 pinout, MCF5249VF140 application, or MCF5249VF140 equivalent, this page delivers verified technical context, package-specific pin mapping (160-pin MAPBGA), real-world use cases in embedded audio systems, and validated alternative microprocessors with documented functional trade-offs.

Technical Context

The MCF5249VF140 implements a clock-doubled ColdFire V2 core with dual-pipeline architecture (IFP + OEP), 8 KB direct-mapped instruction cache, and four-channel DMA supporting memory-to-memory transfers and audio/UART-peripheral coupling. Its EMAC executes single-cycle 32×32-bit multiply-accumulate operations with four 48-bit accumulators and 8-bit extension for dynamic range expansion.

It integrates dedicated audio subsystems: four Philips I²S/EIAJ serial interfaces (three inputs, two outputs), dual IEC958 digital audio I/O paths (one output with professional/consumer channel separation), and an internal audio bus enabling zero-CPU routing between receivers and transmitters. The on-chip PLL accepts 5–35 MHz crystal inputs and generates programmable MCLK1/MCLK2 outputs for audio master clocking.

Key Specifications

Pinout & Package

Package: 160-ball MAPBGA (12 mm × 12 mm, 0.8 mm pitch), qualified for 140 MHz operation. Ball assignments include dedicated audio, SDRAM, IDE/SmartMedia, and GPIO signals with multiplexing support.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar embedded audio controller applications.

Compared with MCF5249VF140, the MCF5253CVM140 trades CD-ROM hardware acceleration for USB 2.0 OTG - ideal for flash-based players - while the MCF5272CVM140 adds Ethernet and PCI at the expense of higher power and cost, making it suitable for networked audio infrastructure rather than portable consumer devices.

Availability

MCF5249VF140 is available at Aetrix Electronics and suitable for portable audio systems, CD-ROM-based media players, and embedded digital audio transcoders requiring stable component supply across long-lifecycle industrial programs.

Supply support for MCF5249VF140 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

Freescale Semiconductor (now part of NXP Semiconductors) is a fabless semiconductor company specializing in embedded processors, analog, and connectivity solutions for automotive, industrial, and consumer markets.

The MCF5249VF140 belongs to the ColdFire microprocessor family, engineered specifically for cost-sensitive, low-power embedded audio and multimedia control applications where hardware-accelerated signal processing and media interface integration reduce system complexity.

FAQ

What is the maximum operating frequency of the MCF5249VF140?

The MCF5249VF140 is qualified for 140 MHz operation in its 160-ball MAPBGA package. This rating is explicitly confirmed in the product brief for the VF140 variant. The 144-pin QFP version (MCF5249V120) is rated only to 120 MHz. Performance metrics such as 125 Dhrystone 2.1 MIPS are measured at the full 140 MHz clock speed, and the on-chip PLL supports stable multiplication from external crystals in the 5–35 MHz range. The MCF5249VF140 achieves this frequency with 1.8 V core supply and advanced 0.18 µm CMOS process technology.

Does the MCF5249VF140 include hardware support for MP3 decoding?

The MCF5249VF140 does not contain dedicated MP3 decode hardware. Instead, its architecture enables efficient software-based MP3 decoding: the ColdFire V2 core with EMAC unit executes MP3 algorithms in under 20 MHz of CPU bandwidth, and the 96 KB on-chip SRAM allows full decode routines to run without external memory access. MP3 decode occurs in SRAM with external memory used only for data input/output - a design choice confirmed in the product brief to minimize latency and power. The MCF5249VF140's hardware CD-ROM XA decoder accelerates media access but not audio decompression.

What audio protocols does the MCF5249VF140 support natively?

The MCF5249VF140 natively supports I²S, Sony EIAJ, and IEC958 (S/PDIF) digital audio protocols. It provides four serial audio interfaces compliant with I²S/EIAJ standards - one with bidirectional data, two with input-only, and one with output-only - plus dual IEC958 inputs and one IEC958 output with separate professional and consumer channel status lines. The internal audio bus allows routing between these interfaces without CPU intervention. All protocol timing is derived from the on-chip PLL and crystal trim circuitry, enabling synchronization to external audio clocks as specified in the MCF5249VF140 documentation.

Can the MCF5249VF140 interface directly with IDE hard drives and SmartMedia cards?

Yes, the MCF5249VF140 includes dedicated IDE and SmartMedia interfaces that enable direct connection to IDE hard drives and SmartMedia flash cards with minimal external components - only bus buffers for address/data isolation. Two dedicated chip-selects (CS2 and CS3) are assigned to these interfaces, and control signals like BUFENb1/BUFENb2 are generated internally. The MCF5249VF140 handles IDE protocol timing, handshaking (IORDY), and SmartMedia command sequencing in hardware, eliminating the need for external interface logic. This capability is explicitly documented in the MCF5249VF140 product brief section 1.5.16.

What debug capabilities are integrated into the MCF5249VF140?

The MCF5249VF140 integrates IEEE 1149.1-compliant JTAG test logic and a Background Debug Mode (BDM) interface supporting real-time instruction trace. Four PST pins provide processor activity status, and a four-bit DDATA bus outputs operand data and change-of-flow addresses - enabling dynamic execution path analysis without halting the core. The MCF5249VF140 also supports debug exception processing and real-time debug during active audio streaming. These features are implemented in silicon and require no external debug probe beyond standard BDM cables, as confirmed in sections 1.5.22–1.5.24 of the official product brief.