May 2007

Rev 1

1/8

AN2551

Application note

Configuring the STR91xFA MCU for optimum

CPU performance

Introduction

The STR91xFA series of Flash MCUs is based on an ARM966E CPU core which executes

code directly from its internal Flash memory at a rate of up to 96 MHz. To allow flexibility for

a variety of applications and power management schemes, there are many configuration

settings available to firmware during the initialization of the STR91xFA at start-up. This

application note outlines the necessary steps to ensure the STR91xFA is configured for

optimum performance for those applications which require the STR91xFA to operate at full

speed and deliver the highest performance from the CPU core and highest bandwidth of

data movement.

The related software is packed into a zip file associated with this application note and

www.st.com