MCF5282-Specific Features

1.2MCF5282-Specific Features

1.2.1Fast Ethernet Controller (FEC)

The MCF5282’s integrated Fast Ethernet Controller (FEC) performs the full set of IEEE 802.3/Ethernet CSMA/CD media access control and channel interface functions. The FEC supports connection and functionality for the 10/100 Mbps 802.3 media independent interface (MII). It requires an external transceiver (PHY) to complete the interface to the media.

1.2.2FlexCAN

The FlexCAN module is a communication controller implementing the CAN protocol. The CAN protocol can be used as an industrial control serial data bus, meeting the specific requirements of real-time processing, reliable operation in a harsh EMI environment, cost-effectiveness, and required bandwidth. FlexCAN contains 16 message buffers.

1.2.3I2C Bus

The I2C bus is a two-wire, bidirectional serial bus that provides a simple, efficient method of data exchange, minimizing the interconnection between devices. This bus is suitable for applications requiring occasional communications over a short distance between many devices.

1.2.4Queued Serial Peripheral Interface (QSPI)

The queued serial peripheral interface module provides a synchronous serial peripheral interface with queued transfer capability. It allows up to 16 transfers to be queued at once, eliminating CPU intervention between transfers.

1.2.5Queued Analog-to-Digital Converter (QADC)

The QADC is a 10-bit, unipolar, successive approximation converter. A maximum of 8 analog input channels can be supported using internal multiplexing. A maximum of 18 input channels can be supported in the internal/external multiplexed mode.

The QADC consists of an analog front-end and a digital control subsystem. The analog section includes input pins, an analog multiplexer, and sample and hold analog circuits. The analog conversion is performed by the digital-to-analog converter (DAC) resistor-capacitor array and a high-gain comparator.

The digital control section contains queue control logic to sequence the conversion process and interrupt generation logic. Also included are the periodic/interval timer, control and

MOTOROLA

Chapter 1. Overview

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Motorola MCF5281 user manual MCF5282-Specific Features