Aaeon SBC-551 Manual - page 10

2    SBC-551/552 User Manual

Introduction

The SBC-551/552 is an all-in-one Single Board Computer (SBC)

capable of handling the Intel Pentium P54C, P55C (MMX), AMD

K6, as well as the Cyrix 6x86 (M1) and 6x86MX (M2) CPUs.

Reliability, performance, flexibility, and adequate expansion

capabilities are essential qualities for SBCs and their embedded

applications and the SBC-551/552 provides all of these.

The Smart Temperature Control technology (LM75 chip) monitors

the CPU temperature and automatically slows down the CPU

frequency when the CPU temperature exceeds a specified safe

range, helping your system recover from abnormal temperature

fluctuations.

The SBC-551/552 supports the M-Systems DiskOnChip 2000

(optional) which is a new generation of high performance single-

chip Flash Disk. It provides a Flash Disk (as a BIOS expansion)

which doesn't require any bus, slots, or connectors. It is also the

optimal solution for Single Board Computers because of its small

size, easy integration, plug-and-play functionality, and its low

power consumption.  The DiskOnChip is available in capacities

from 2MB to 72MB and fits in a standard 32-pin DIP socket.

The SBC-551/552 also includes a high speed, local bus IDE

controller which supports (through ATA PIO) mode 3 and mode 4

hard disks, Ultra DMA/33 (data transfer rates up to 33MB/sec) and

up to 2 IDE devices.

Onboard features include one high speed RS-232 serial port, one

RS-232/422/485 serial port with 16C550 UARTs, one bidirectional

SPP/EPP/ECP parallel port, and a floppy drive controller.  In

addition to the 486's 16 KB of onchip cache memory, the SBC-551/

552 includes an extra 512 KB of pipeline-burst L2 cache memery.

If program execution is halted by a program bug or EMI, the board's

watchdog timer can automatically reset the CPU or generate an

interrupt.  This ensures reliability in unmanned or standalone

systems.