Élan™SC520 Microcontroller User’s Manual xxiii
PREFACE
INTRODUCTION
Élan™SC520 MICROCONTROLLER
The Élan™SC520 microcontroller is a full-featured microcontroller developed for the
general embedded market. The ÉlanSC520 microcontroller combines a 32-bit, low-voltage
Am5
x
86® CPU with a complete set of integrated peripherals suitable for both real-time and
PC/AT-compatible embedded applications.
PURPOSE OF THIS MANUAL
This manual describes the technical features and programming interface of the ÉlanSC520
microcontroller.
Intended Audience
The
Élan™SC520 Microcontroller User’s Manual
, order #22004, is intended for computer
software and hardware engineers and system architects who are designing or are
considering designing systems based on the ÉlanSC520 microcontroller.
Overview of this Manual
The manual is organized into the following chapters:
■ Chapter 1 includes an architectural overview of the ÉlanSC520 microcontroller, along
with applications diagrams.
■ Chapter 2 describes the signals and pins of the ÉlanSC520 microcontroller. Logic
diagrams showing defaults and pins with shared signals are also found in this chapter.
Detailed pin state information is available in the
Élan™SC520 Microcontroller Data
Sheet
.
■ Chapter 3 provides an overview of system initialization and shows example
configurations.
■ Chapter 4 describes the system address mapping on the ÉlanSC520 microcontroller.
■ Chapter 5 provides information on clock generation and control.
■ Chapter 6 describes the reset sources and states of the ÉlanSC520 microcontroller.
■ Chapter 7 includes an overview of the integrated Am5
x
86 CPU. For additional
information about the CPU, consult the references provided in this chapter.
■ Chapter 8 describes the system arbiter on the ÉlanSC520 microcontroller, which
includes a CPU bus arbiter and a PCI bus arbiter.
■ Chapter 9 describes the PCI bus host bridge implemented on the ÉlanSC520
microcontroller.
■ Chapter 10 describes the synchronous DRAM (SDRAM) controller.
■ Chapter 11 describes the SDRAM write buffer and read buffer with read-ahead
feature.
■ Chapter 12 describes the ROM/Flash controller.
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