AMD Elan SC520 - Chapter 1 Architectural Overview; Élansc520 Microcontroller; Distinctive Characteristics

Élan™SC520 Microcontroller User’s Manual 1-1
CHAPTER
1
ARCHITECTURAL OVERVIEW
1.1 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.
An integrated PCI host bridge, SDRAM controller, enhanced PC/AT-compatible peripherals,
and advanced debugging features provide the system designer with a wide range of on-
chip resources, allowing support for legacy devices as well as new devices available in the
current PC marketplace.
Designed for medium- to high-performance applications in the telecommunications, data
communications, and information appliance markets, the ÉlanSC520 microcontroller is
particularly well suited for applications requiring high throughput combined with low latency.
1.1.1 Distinctive Characteristics
■ Industry-standard Am5
x
86® CPU with floating point unit (FPU) and 16-Kbyte write-back
cache
– 100-MHz and 133-MHz operating frequencies
– Low-voltage operation (core V
CC
= 2.5 V)
– 5-V tolerant I/O (3.3-V output levels)
■ E86™ family of x86 embedded processors
– Part of a software-compatible family of microprocessors and microcontrollers well
supported by a wide variety of development tools
■ Integrated PCI host bridge controller leverages standard peripherals and software
– 33 MHz, 32-bit PCI bus Revision 2.2-compliant
– High-throughput 132-Mbyte/s peak transfer
– Supports up to five external PCI masters
– Integrated write-posting and read-buffering for high-throughput applications
■ Synchronous DRAM (SDRAM) controller
– Supports 16-, 64-, 128-, and 256-Mbit SDRAM.
– Supports 4 banks for a total of 256 Mbytes.
– Error Correction Code provides system reliability.
– Buffers improve read and write performance.
■ AMDebug technology offers a low-cost solution for the advanced debugging
capabilities required by embedded designers.
– Allows instruction tracing during execution from the Am5
x
86 CPU’s internal cache
– Uses an enhanced JTAG port for low-cost debugging