NXP Semiconductors MCF5307CFT66B

Overview

MCF5307CFT66B from Freescale Semiconductor is a ColdFire® v2 32-bit microprocessor with integrated DRAM controller, UARTs, I²C, timers, and DMA-designed for embedded networking and industrial control. It operates at 66 MHz CPU frequency, features 8 KB unified cache and 4 KB on-chip SRAM, and supports external 16-bit parallel bus interfacing.

For engineers reviewing the MCF5307CFT66B datasheet, MCF5307CFT66B pinout, MCF5307CFT66B application, or MCF5307CFT66B equivalent, key selection considerations include its ColdFire v2 core compatibility, PLL-configurable clocking (up to 66 MHz), integrated peripheral set, and support for asynchronous/synchronous DRAM-critical for legacy industrial gateway and protocol-converter designs.

Technical Context

The MCF5307CFT66B implements the ColdFire v2 instruction set architecture with a two-stage pipeline (IFP/OEP), hardware MAC unit, and integer divide module. It integrates a System Integration Module (SIM) containing PLL, interrupt controller, chip-select logic, and JTAG debug interface.

Its DRAM controller supports both synchronous (SDRAM) and asynchronous (SRAM/ROM) memory with programmable timing, while the dual UARTs and I²C module enable serial communication in resource-constrained edge nodes. The 16-bit parallel port provides general-purpose I/O with configurable pin assignment via PAR register.

Key Specifications

Pinout & Package

256-pin Plastic Quad Flat Package (PQFP), 28 mm × 28 mm, 0.65 mm pitch. RoHS-compliant lead-free finish.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCF5307CFT66B, the MCF5206E offers lower power and cost at reduced performance and memory interface capability, while the MCF52235 delivers higher CPU throughput and USB but removes integrated DRAM control-making MCF5307CFT66B uniquely balanced for legacy industrial systems requiring SDRAM and dual UARTs in one package.

Availability

MCF5307CFT66B is available at Aetrix Electronics and suitable for industrial protocol gateways, legacy HMI controllers, and networked energy meters requiring stable component supply and long-term obsolescence management.

Supply support for MCF5307CFT66B 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) was a leading designer of embedded processors, analog, and mixed-signal ICs for automotive, industrial, and networking markets.

The MCF5307CFT66B belongs to the ColdFire® microprocessor family, engineered for deterministic real-time control in industrial automation, communications infrastructure, and legacy embedded systems where code compatibility and peripheral integration are critical.

FAQ

What is the maximum operating frequency of the MCF5307CFT66B?

The MCF5307CFT66B operates at a maximum CPU frequency of 66 MHz, achieved by configuring its internal Phase-Locked Loop (PLL) to multiply an external crystal input (typically 16.5 MHz or 33 MHz). This frequency is fixed for the 'CFT66B' variant and cannot be overclocked beyond specification. All timing-critical peripherals-including UARTs, timers, and DRAM controller-are synchronized to this clock domain, ensuring deterministic behavior in real-time applications.

Does the MCF5307CFT66B include on-chip memory, and how is it used?

Yes, the MCF5307CFT66B integrates 8 KB of unified instruction/data cache and 4 KB of on-chip SRAM. The SRAM is mapped into the processor's address space and can be used for critical data structures, stack storage, or boot code-reducing reliance on slower external memory. The cache improves instruction fetch and data access efficiency for frequently used routines, especially beneficial in interrupt-driven industrial firmware where latency predictability matters.

Can the MCF5307CFT66B interface directly with SDRAM?

Yes, the MCF5307CFT66B includes a fully integrated SDRAM controller supporting standard x16 SDRAM devices with programmable row/column addressing, auto-refresh, and burst modes. It handles all SDRAM timing requirements-including CAS latency, RAS-to-CAS delay, and refresh intervals-via dedicated SIM registers. No external SDRAM controller IC is required, simplifying design and reducing bill-of-materials cost in gateway and HMI applications.

What debug capabilities does the MCF5307CFT66B provide?

The MCF5307CFT66B supports IEEE 1149.1 JTAG Test Access Port and Background Debug Mode (BDM) for non-intrusive real-time debugging. It enables full visibility into CPU state, memory, and registers via standard BDM tools-even while the application runs. Features include hardware breakpoints, real-time trace via PST/DDATA pins, and single-step execution. This makes MCF5307CFT66B suitable for field-deployed industrial firmware validation and update scenarios.

Is the MCF5307CFT66B pin-compatible with other ColdFire processors?

No, the MCF5307CFT66B is not pin-compatible with other ColdFire families such as MCF52xx or MCF54xx series. Its 256-pin PQFP package and signal assignments-including dedicated DRAM control lines, DSACK signals, and SIM-specific pins-are unique to the MCF5307 family. Migration to newer ColdFire variants requires PCB redesign due to differing pinouts, voltage domains, and peripheral mappings-even when software compatibility is preserved.