MCF5232CVM100  Description

The MCF523x is a family of highly-integrated 32-bit microcontrollers based on the V2 ColdFire microarchitecture. Featuring a 16 or 32-channel eTPU,

64 Kbytes of internal SRAM, a 2-bank SDRAM controller, four 32-bit timers with dedicated DMA, a 4 channel DMA controller, up to 2 CAN modules, 3

UARTs and a queued SPI, the MCF523x family has been designed for general purpose industrial control applications. It is also a high-performance upgrade for users of the MC68332. This document provides an overview of the MCF523x microcontroller family, as well as detailed descriptions of the mechanical and electrical characteristics of the devices. The MCF523x family is based on the Version 2 ColdFire reduced instruction set computing (RISC) microarchitecture operating at a core frequency of up to 150 MHz and bus frequency up to 75 MHz. 

MCF5232CVM100  Features

Use a multi-layer board with a separate ground plane.

Place the crystal and all other associated components as close to the EXTAL and XTAL (oscillator

pins) as possible.

Do not run a high-frequency trace around the crystal circuit.

Ensure that the ground for the bypass capacitors is connected to a solid ground trace.

Tie the ground trace to the ground pin nearest EXTAL and XTAL. This prevents large loop currents

in the vicinity of the crystal.

Tie the ground pin to the most solid ground in the system.

Do not connect the trace that connects the oscillator and the ground plane to any other circuit

element. This tends to make the oscillator unstable.

Tie XTAL to the ground when an external oscillator is clocking the device