NXP Semiconductors MCF5307FT90B

Overview

MCF5307FT90B 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 90 MHz CPU clock (PCLK), features 8 KB unified cache, 4 KB on-chip SRAM, and supports 16-bit external bus interface with programmable chip selects.

For engineers reviewing the MCF5307FT90B datasheet, MCF5307FT90B pinout, MCF5307FT90B application, or MCF5307FT90B equivalent, key selection factors include its ColdFire v2 core compatibility, PLL-configurable clock synthesis, IEEE 1149.1 JTAG debug support, and integrated peripheral set for deterministic real-time control in space-constrained designs.

Technical Context

The MCF5307FT90B implements the ColdFire v2 instruction set architecture with dual-pipeline execution (IFP/OEP), hardware MAC unit, and integer divide module. Its System Integration Module (SIM) provides PLL-based clock generation, interrupt controller with 64 vectors, and chip-select logic supporting up to eight memory regions.

Peripheral integration includes two UARTs with FIFOs, an I²C master/slave module compliant with Philips I²C specification, 32-bit timer with input capture/output compare, and a synchronous/asynchronous DRAM controller supporting 16-bit data bus width and multiple refresh modes.

Key Specifications

Pinout & Package

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

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCF5307FT90B, the MCF5206EFT40 trades DRAM integration and clock speed for simpler memory subsystem design, while the MCF5329CVM66 extends connectivity at the cost of pinout incompatibility and higher power consumption.

Availability

MCF5307FT90B is available at Aetrix Electronics and suitable for industrial automation, network infrastructure, and medical instrumentation requiring stable component supply across long-lifecycle programs.

Supply support for MCF5307FT90B 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 MCF5307FT90B belongs to the ColdFire v2 microprocessor family, engineered for deterministic real-time control in resource-constrained embedded systems where integration, debug capability, and clock flexibility are critical.

FAQ

What is the maximum operating frequency of the MCF5307FT90B?

The MCF5307FT90B is rated for a maximum CPU clock (PCLK) of 90 MHz. This frequency is derived from the external CLKIN signal through the on-chip PLL, which supports multiplication factors up to ×32. The actual achievable PCLK depends on board layout, power supply stability, and PLL filter component selection per the MCF5307UM/D reference design guidelines. MCF5307FT90B must be operated within this limit to guarantee timing compliance across all internal modules including UARTs, timers, and DRAM controller.

Does the MCF5307FT90B include on-chip memory, and how is it used?

Yes, the MCF5307FT90B integrates 4 KB of on-chip SRAM and an 8 KB unified instruction/data cache. The SRAM is mapped to a fixed address range and used for fast-access variables, stack storage, or boot code. The cache improves performance by reducing external memory accesses for frequently used instructions and data. Cache behavior (write-through or copyback) and line locking are controlled via the CACR and ACR registers. MCF5307FT90B's cache coherency protocol ensures consistency during DMA transfers and peripheral accesses.

Can the MCF5307FT90B directly interface with standard SDRAM chips?

Yes, the MCF5307FT90B includes a synchronous/asynchronous DRAM controller capable of driving standard 16-bit-wide SDRAM devices. It supports auto-refresh, burst reads/writes, and configurable CAS latency and RAS-to-CAS delay. External SDRAM must be connected to the PST[31:0] bus with appropriate termination and timing constraints. MCF5307FT90B requires proper initialization of SIM and DRAM controller registers-including MBAR, RAMBAR, and DRAM timing registers-before enabling refresh and memory access.

What debug interfaces does the MCF5307FT90B support?

The MCF5307FT90B supports IEEE 1149.1 JTAG boundary-scan testing and Freescale's Background Debug Mode (BDM) via dedicated TCK/TMS/TDI/TDO pins. BDM enables real-time halt/resume, register inspection, memory read/write, and breakpoint triggering without stopping the system clock. Debug tools such as P&E Micro's ColdFire BDM interfaces and CodeWarrior IDE fully support MCF5307FT90B. No external debug probe is required beyond standard JTAG cabling.

Is the MCF5307FT90B pin-compatible with other ColdFire processors?

No, the MCF5307FT90B is not pin-compatible with other ColdFire families such as MCF52xx or MCF54xx. Its 256-pin PQFP package and signal assignments-including PST[31:0] multiplexing, PLL-specific filter pins, and dedicated BDM signals-are unique to the MCF5307 series. Migration to newer ColdFire variants like MCF5329 requires PCB redesign due to differing pinouts, voltage domains, and peripheral mappings. MCF5307FT90B remains a standalone solution for legacy designs requiring long-term availability.