NXP Semiconductors SCF5250VM120

Overview

SCF5250VM120 from NXP Semiconductors (formerly Freescale) is a 32-bit ColdFire V2 microprocessor designed as a system controller/decoder for compressed audio players, featuring a 120 MHz core clock, 128 KB on-chip SRAM, 8 KB instruction cache, integrated CD-ROM encoder/decoder, and hardware EMAC unit for audio post-processing. It targets portable and automotive CD/HDD-based music players.

For engineers reviewing the SCF5250VM120 datasheet, SCF5250VM120 pinout, SCF5250VM120 application, or SCF5250VM120 equivalent, key selection considerations include its MAPBGA-196 package, -20°C to +70°C industrial temperature range, lead-free compliance, 1.2V core supply with integrated linear regulator, and dedicated I²S/IEC958/IDE/SmartMedia interfaces for audio subsystem integration.

Technical Context

The SCF5250VM120 implements a decoupled two-pipeline ColdFire V2 core (IFP + OEP) with single-cycle 32×32-bit integer multiply and four-stage EMAC execution. Its memory subsystem includes 128 KB SRAM split into two 64 KB banks-SRAM0 for core access, SRAM1 accessible by DMA-and an 8 KB direct-mapped instruction cache delivering 107 MIPS at 120 MHz.

Peripheral integration centers on audio-specific functions: three I²S interfaces (one 4-pin, two 3-pin), dual SPDIF I/O, internal audio bus enabling zero-CPU routing between receivers/transmitters, hardware CD-ROM sector decode/encode (sync recognition, descrambling, CRC verification/insertion), and programmable PLL supporting 5–35 MHz crystal inputs with MCLK1/MCLK2 outputs configurable to Fxtal, Fxtal/2, Fxtal/3, or Fxtal/4.

Key Specifications

Pinout & Package

SCF5250VM120 uses a 196-ball MAPBGA package (12 mm × 12 mm, 0.8 mm pitch) with ball grid layout optimized for audio subsystem signal integrity and thermal dissipation in compact portable designs. Pin functions are fully multiplexed with GPIO capability across 60 inputs and 57 outputs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SCF5250VM120, SCF5250AG120 trades miniaturization for assembly flexibility, while SCF5250CAG120 adds thermal robustness at the cost of higher unit price and larger PCB footprint-neither offers pin compatibility, so layout redesign is required for substitution.

Availability

SCF5250VM120 is available at Aetrix Electronics and suitable for portable media players, automotive infotainment systems, and industrial CD-ROM controllers requiring stable component supply and long-term lifecycle support.

Supply support for SCF5250VM120 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 company formed from the spin-off of Philips' semiconductor division, specializing in secure connectivity solutions for automotive, industrial, and consumer applications.

The SCF5250VM120 belongs to NXP's ColdFire family of 32-bit microprocessors, engineered specifically for cost-sensitive, low-power audio decoding and system control in portable and automotive entertainment platforms.

FAQ

What is the maximum supported SDRAM size for SCF5250VM120?

The SCF5250VM120 SDRAM controller supports one bank of 16-bit SDRAM up to 32 MB (256 Mbits). This is achieved using 23-bit address space with page-mode, non-page-mode, and burst-page-mode operation. The controller provides glueless interface capability and does not support DDR or RDRAM technologies. SCF5250VM120 requires external SDRAM chips meeting JEDEC-standard SDR SDRAM specifications.

Does SCF5250VM120 include hardware MP3 decoding capability?

No, SCF5250VM120 does not include licensed MP3 decoder hardware. Unlike SCF5250DAG120 or SCF5250EAG120 variants, SCF5250VM120 lacks Thomson Licensing S.A. MP3 patent royalties and associated firmware. MP3 decode must be implemented in software using the EMAC unit and 120 MHz ColdFire core-typical performance yields real-time decode for stereo 128 kbps streams with ~70% CPU utilization.

Can SCF5250VM120 operate without an external crystal?

No, SCF5250VM120 requires an external crystal (5–35 MHz) connected to CRIN/CROUT pins to generate its system clock. The on-chip PLL synthesizes the 120 MHz core clock and programmable audio clocks (MCLK1/MCLK2) from this reference. There is no internal RC oscillator; omitting the crystal prevents boot and core operation. SCF5250VM120 does support VCO mode for clock trimming using XTRIM/GPIO0 to lock to incoming IEC958 or I²S signals.

How many I²S interfaces does SCF5250VM120 support, and what are their configurations?

SCF5250VM120 supports three independent Philips I²S/SEIAJ serial audio interfaces: one 4-pin interface (bit clock, word clock, data in, data out) and two 3-pin interfaces (bit clock, word clock, data in or data out). All interfaces accept bit clock frequencies up to one-third of the internal system clock (≤40 MHz at 120 MHz core), with no minimum sampling rate limitation. Each interface connects to the internal audio bus, enabling flexible routing and format conversion without CPU involvement.

Is the 128 KB on-chip SRAM in SCF5250VM120 cache-coherent with the instruction cache?

No, the 128 KB SRAM in SCF5250VM120 is not cache-coherent with the 8 KB instruction cache. The SRAM is divided into two banks (SRAM0 and SRAM1), both accessible in one cycle by the ColdFire core. SRAM0 is used for core code/data; SRAM1 supports DMA access. The instruction cache is separate, direct-mapped, and physically addressed-it caches instructions fetched from external memory or SRAM but does not maintain coherency with SRAM writes. Software must manage cache line invalidation when modifying executable code in SRAM.