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34 PPC-A84 User's Manual
3.1 Introduction
The PCM-5821 is a highly reliable single board computer based on the NS
GXm 233MHz CPU. It offers built-in functionality comparable to a com-
plete industrial PC system, including a VGA/LCD controller, network
communications, compact flash diak in a small 8" x 5.75" form factor.
For maximum performance, the PCM-5821 also supports an SDRAM
SODIMM socket that can accept up to 128 MB memory. On-board features
include an Ethernet interface, audio interface, socket for Compact Flash
Card, Enhanced IDE interface with up to Ultra DMA transfer protocol, one
parallel port, two serial ports (RS-232 and RS-232/422/485) with DB-9
connector as COM1, and a mini-DIN PS/2 keyboard/mouse interface. An
SVGA/LCD display controller (LCD, and CRT displays) allows LCD screen
resolutions up to 1024 x 768 and CRT resolutions up to 1280 x 1024 @ 16 M
colors.
The PCM-5821 complies with the "Green Function" standard and supports
three types of power saving features: Normal, Doze, and Sleep modes.
The display type configuration is done through software. A single Flash chip
holds the system BIOS and the VGA BIOS. This minimizes the number of
chips and eases configuration. You can change the display BIOS simply by
programming the Flash chip.
It also offers faster data access and longer MTBF than mechanical disk drives
and is an ideal solution for critical commercial or industrial applications.
The watchdog timer ensures the system will be reset if it stops due to a
program bug or EMI problem.