NXP Semiconductors MCF5206FT33A

Overview

MCF5206FT33A from Freescale Semiconductor (formerly Motorola) is a 32-bit ColdFire V2 integrated microprocessor with on-chip 4 KB instruction cache, 8 KB SRAM, DRAM controller, dual UART, and timer modules. It operates at 33 MHz, supports 32-bit data/28-bit address bus, and targets embedded control applications requiring deterministic real-time response and low-power operation.

For engineers reviewing the MCF5206FT33A datasheet, MCF5206FT33A pinout, MCF5206FT33A application, or MCF5206FT33A equivalent, key selection criteria include its 33 MHz core frequency, integrated SRAM size, DRAM controller timing compatibility, UART channel count, and ColdFire V2 ISA compliance for legacy M68K migration paths.

Technical Context

The MCF5206FT33A implements the ColdFire V2 core architecture with a five-stage pipeline, supervisor/user mode separation, and full 32-bit register set. It integrates a dedicated 4 KB instruction-only cache with line-fill and coherency management logic, eliminating external instruction memory bottlenecks.

Its system integration module provides interrupt prioritization (7-level IPL), software watchdog timer, bus timeout monitoring, and pin assignment control. The DRAM controller supports two banks of asynchronous DRAM with programmable RAS/CAS timing, while the dual UARTs support independent baud rates and hardware flow control via RTS/CTS signals.

Key Specifications

Pinout & Package

256-pin Plastic Quad Flat Package (PQFP), 28 × 28 mm body, 0.65 mm lead pitch, JEDEC MS-026AC compliant. Thermal pad on underside for enhanced heat dissipation in industrial environments.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCF5206EM33, the MCF5206FT33A trades extended temperature tolerance for lower acquisition cost and reduced thermal design complexity; compared with MCF5208CVM66, it offers simpler peripheral set and lower power consumption at the expense of missing USB/Ethernet interfaces and halved clock speed.

Availability

MCF5206FT33A is available at Aetrix Electronics and suitable for industrial automation, network infrastructure, medical device UI, and automotive body electronics requiring stable component supply across multi-year production cycles.

Supply support for MCF5206FT33A 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 and analog/mixed-signal ICs, founded from Motorola's semiconductor division.

The MCF5206FT33A belongs to the ColdFire family - engineered for cost-sensitive, real-time embedded systems requiring M68K software compatibility without the overhead of full MMU or high-clock-frequency designs.

FAQ

What is the maximum operating frequency of the MCF5206FT33A?

The MCF5206FT33A is factory-specified and tested to operate reliably at 33 MHz across its commercial temperature range (0°C to +70°C). This frequency defines the upper limit for instruction execution rate, bus transfer timing, and peripheral clock derivation. Exceeding 33 MHz may cause timing violations in the DRAM controller or UART modules and is not supported by Freescale's characterization data for the MCF5206FT33A.

Does the MCF5206FT33A include an integrated memory management unit (MMU)?

No, the MCF5206FT33A does not include a memory management unit. It implements a flat 32-bit address space with no virtual memory translation or protection domains. Memory access is direct and linear, relying on software-based memory protection schemes or external logic if required. This design aligns with the ColdFire V2 architecture's focus on deterministic real-time behavior rather than full POSIX-compliant OS support.

Can the MCF5206FT33A execute code directly from its on-chip SRAM?

Yes, the MCF5206FT33A supports executing code directly from its 8 KB on-chip SRAM. The SRAM is mapped into the processor's linear address space and is accessible with zero wait states, making it ideal for time-critical interrupt service routines or boot code initialization sequences. Unlike the instruction cache, which is read-only and transparent, the SRAM is fully read/write and can be used for both code and data storage in the MCF5206FT33A.

What debug interfaces are supported by the MCF5206FT33A?

The MCF5206FT33A supports IEEE 1149.1 JTAG boundary-scan testing and on-chip debug via the dedicated Test Access Port (TAP) controller. It also includes a development serial interface (DSI/DSO/DSCLK) for real-time trace and breakpoint control. These interfaces enable full visibility into CPU state, memory contents, and peripheral registers during development - essential capabilities for validating complex real-time firmware on the MCF5206FT33A.

Is the MCF5206FT33A pin-compatible with other ColdFire family members?

No, the MCF5206FT33A is not pin-compatible with other ColdFire devices such as the MCF5208 or MCF5223x series. Its 256-pin PQFP package and signal assignment - including dedicated DRAM control pins (RAS/CAS), dual UART I/O, and ColdFire-specific bus timing signals - are unique to the MCF5206 generation. Board-level replacement requires PCB redesign; migration paths rely on software compatibility rather than hardware interchangeability for the MCF5206FT33A.