NXP Semiconductors MCF53281CVM240

Overview

MCF53281CVM240 from Freescale Semiconductor is a 240 MHz ColdFire V3 RISC microprocessor in 256-ball MAPBGA (17 mm × 17 mm), featuring 32 KB dual-ported SRAM, 16 KB unified write-back cache, SDR/DDR SDRAM controller, FlexCAN 2.0B, USB 2.0 Host and OTG, FEC, LCDC, and cryptography accelerators - deployed in industrial VoIP gateways and embedded HMI systems.

For engineers reviewing the MCF53281CVM240 datasheet, MCF53281CVM240 pinout, MCF53281CVM240 application, or MCF53281CVM240 equivalent, key selection criteria include 256-MAPBGA package compatibility, 240 MHz core clock with 80 MHz peripheral bus, FlexCAN support, USB OTG + Host dual-role capability, and integrated LCD controller for display-integrated edge devices.

Technical Context

The MCF53281CVM240 implements the ColdFire V3 core with EMAC, supports dynamic DRAMSEL-driven SDR/DDR mode switching on shared address/data pins, and integrates two interrupt controllers (INTC0/INTC1) with configurable priority levels. Its FlexBus interface provides 32-bit data and 24-bit address multiplexing with programmable chip selects and timing control.

USB functionality uses dedicated ULPI-capable pins (USBOTG_M/P, USBHOST_M/P) with independent USB_VDD/USB_VSS supplies; SDRAM interface operates at up to 133 MHz with separate SD_CLK, SD_CKE, SD_CS0/1, SD_RAS/SCAS, and DQS signaling - all electrically isolated per voltage domain (IVDD, EVDD, SDVDD, PLLVDD).

Key Specifications

Pinout & Package

Package: 256-ball MAPBGA, 17 mm × 17 mm, 1.0 mm ball pitch, RoHS-compliant. Thermal resistance θ_JMA = 37°C/W (natural convection, 4-layer board).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCF5329CVM240, the MCF53281CVM240 omits crypto accelerators but retains identical timing, memory, and peripheral interfaces - making it optimal for cost-sensitive VoIP or HMI designs where security is handled externally. Against i.MX257CJM6A, it trades ARM ecosystem advantages for deterministic ColdFire real-time behavior and native industrial interface integration.

Availability

MCF53281CVM240 is available at Aetrix Electronics and suitable for industrial VoIP gateways, human-machine interface terminals, and secure edge gateways requiring stable component supply across multi-year production cycles.

Supply support for MCF53281CVM240 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 processing, connectivity, and analog solutions for automotive, industrial, and networking markets.

The MCF532x product line was designed for high-performance, low-power embedded applications requiring integrated communications (FEC, USB, CAN), display (LCDC), and signal processing (VoIP, crypto) - targeting industrial gateways and intelligent edge nodes.

FAQ

What is the maximum operating frequency of the MCF53281CVM240 core?

The MCF53281CVM240 operates at a maximum core clock frequency of 240 MHz, delivering up to 211 Dhrystone 2.1 MIPS. This frequency is achieved using the on-chip Phase-Locked Loop (PLL) with external crystal reference (EXTAL/XTAL), and requires proper PLL power filtering per Figure 2 in the MCF5329DS Rev. 5 datasheet. The peripheral bus runs at one-third the core clock (≤80 MHz), and all timing specifications in the datasheet assume this configuration for MCF53281CVM240.

Does the MCF53281CVM240 support DDR SDRAM?

Yes, the MCF53281CVM240 includes a fully integrated SDR/DDR SDRAM controller supporting both SDR and DDR modes. Mode selection is controlled dynamically by the DRAMSEL signal: asserted for SDR, negated for DDR. The controller supports 16-bit data width, programmable CAS latency, and JEDEC-compliant timing - verified for 133 MHz DDR operation. Pin assignments for DDR signals (e.g., SD_DQS2, SD_CLK) are fixed per the 256-MAPBGA pinout in Figure 4 of MCF5329DS Rev. 5.

How many UART interfaces does the MCF53281CVM240 provide?

The MCF53281CVM240 provides three Universal Asynchronous Receiver Transmitters (UARTs): U0, U1, and U2. U0 and U1 have dedicated pins (U0TXD/U0RXD, U1TXD/U1RXD), while U2 is multiplexed onto QSPI, SSI, DMA timer, and I²C pins (e.g., U2TXD on I2C_SCL2, U2RXD on I2C_SDA2). All three support standard asynchronous framing, programmable baud rates, and hardware flow control (CTS/RTS) - confirmed in Table 1 and Section 4.1 of the MCF5329DS Rev. 5 datasheet.

Is the MCF53281CVM240 pin-compatible with the MCF5328CVM240?

Yes, the MCF53281CVM240 is pin-compatible with the MCF5328CVM240 and MCF5329CVM240 in the 256-MAPBGA package, as explicitly stated in Figure 4 ("MCF5328CVM240, MCF53281CVM240, and MCF5329CVM240 Pinout Top View") and Table 2 of the MCF5329DS Rev. 5 datasheet. All share identical ball mapping, voltage domains, and reset states - enabling PCB reuse across these variants. Functional differences (e.g., FlexCAN presence in MCF53281/MCF5329 only) are implemented internally without affecting pin behavior.

What is the purpose of the PLL_TEST pin on the MCF53281CVM240?

The PLL_TEST pin (ball N13) on the MCF53281CVM240 must be left floating to ensure proper PLL operation - as mandated in Note under Section 4.2 ("Pinout-256 MAPBGA") of the MCF5329DS Rev. 5 datasheet. Connecting this pin to any voltage rail, resistor, or trace introduces parasitic loading that disrupts PLL loop stability, causing clock jitter or failure to lock. This requirement applies exclusively to the MCF53281CVM240 and other 256-MAPBGA variants; no pull-up/down or termination is permitted.