NXP Semiconductors MCF5307AI66B

Overview

MCF5307AI66B from Freescale Semiconductor is a ColdFire® v2 32-bit microprocessor with integrated DRAM controller, UARTs, I²C, timers, and DMA-designed for embedded control in industrial networking and communications equipment. It operates at 66 MHz CPU clock, integrates 4 KB on-chip SRAM and 8 KB unified cache, supports 32-bit external bus interface, and features IEEE 1149.1 JTAG debug support.

For engineers reviewing the MCF5307AI66B datasheet, MCF5307AI66B pinout, MCF5307AI66B application, or MCF5307AI66B equivalent, key selection criteria include its 66 MHz ColdFire core performance, integrated DRAM controller timing compatibility, I²C master/slave capability, UART channel count, and JTAG-based real-time trace debugging support in resource-constrained edge devices.

Technical Context

The MCF5307AI66B implements the ColdFire v2 instruction set architecture with dual-pipeline execution (IFP/OEP), hardware MAC unit, and integer divide module. It includes a System Integration Module (SIM) managing PLL clock generation, interrupt prioritization across 64 vectors, chip-select configuration, and bus arbitration.

Its peripheral subsystem integrates two UART modules supporting full-duplex asynchronous communication, an I²C module compliant with Philips I²C specification, a 3-channel timer module with input capture/output compare, and a 4-channel DMA controller supporting memory-to-peripheral transfers without CPU intervention.

Key Specifications

Pinout & Package

The MCF5307AI66B is housed in a 256-pin PQFP (Plastic Quad Flat Package) with 0.5 mm pitch, measuring 28 mm × 28 mm. Pin assignments are defined per the MCF5307UM/D Rev. 2.0 mechanical data section and signal descriptions chapter.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCF5307AI66B, the MCF5307CZQ66 offers identical functionality in a space-optimized package ideal for compact designs, while the MCF5206EVM66 sacrifices integration for lower unit cost and simpler power delivery - making it viable only when peripheral offload is acceptable and board area is not constrained.

Availability

MCF5307AI66B is available at Aetrix Electronics and suitable for industrial protocol gateways, network edge routers, energy meter concentrators, and building automation controllers requiring stable component supply across extended product lifecycles.

Supply support for MCF5307AI66B 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, focused on automotive, industrial, and networking markets.

The MCF5307AI66B belongs to the ColdFire family - a line of 32-bit microprocessors targeting cost-sensitive, real-time embedded applications where integration, debug capability, and deterministic performance outweigh raw MIPS/Watt metrics.

FAQ

What is the maximum operating frequency of the MCF5307AI66B?

The MCF5307AI66B is rated for a maximum CPU clock frequency of 66 MHz, achieved via its internal Phase-Locked Loop (PLL) that multiplies an external 4–50 MHz reference clock. This frequency is specified under commercial temperature range (0°C to +70°C) and 3.3 V ±0.3 V supply conditions per the MCF5307UM/D Rev. 2.0 electrical specifications section.

Does the MCF5307AI66B include on-chip memory, and what type?

Yes, the MCF5307AI66B integrates 4 KB of on-chip SRAM mapped at fixed address 0x00000000 and an 8 KB unified instruction/data cache. The SRAM is used for fast-access data storage and boot code execution, while the cache reduces external memory bandwidth demand during active program execution - both are accessible without external memory interface timing constraints.

Can the MCF5307AI66B directly interface with SDRAM, and what configurations are supported?

Yes, the MCF5307AI66B includes a dedicated Synchronous/Asynchronous DRAM Controller Module supporting 1M×16-bit to 16M×16-bit DRAM devices. It provides programmable row/column address multiplexing, CAS-before-RAS refresh, and configurable burst lengths - enabling direct connection to standard 5V or 3.3V SDRAM without external controller logic.

How many serial communication interfaces does the MCF5307AI66B provide, and what protocols do they support?

The MCF5307AI66B provides two independent UART modules supporting standard asynchronous serial communication (RS-232/RS-485 levels with external transceivers) and one I²C module compliant with Philips I²C specification (100 kHz standard mode). UARTs support programmable baud rates, parity, stop bits, and FIFO buffering; I²C supports both master and slave operation with configurable clock frequency.

Is JTAG debugging supported on the MCF5307AI66B, and what capabilities does it offer?

Yes, the MCF5307AI66B implements full IEEE 1149.1 JTAG Test Access Port (TAP) with Background Debug Mode (BDM) support. It enables non-intrusive real-time trace, hardware breakpoints, register and memory inspection, and flash programming - all accessible via standard 5-wire BDM interface using compatible debug probes such as P&E Multilink or Segger J-Link.