Features - Aaeon SBC-551 Manual

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.
2 SBC-551/552 User Manual