Detailed System Description; Power Requirements - DIGITAL-LOGIC Microspace MSM586SEN Technical User Manual

DIGITAL-LOGIC AG
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ETAILED
This system has a system configuration based on the ISA architecture. Check the I/O and the memory map
in this chapter.
4.1

Power Requirements

The power is connected through the PC/104 power connector; or the separate power connector on the
board. The supply uses only the +5 Volts and ground connection.
Warning:
Tolerance of 5V supply:
ATTENTION:
The precise power requirements of the MICROSPACE MSM586SEV depend on a number of factors, includ-
ing which functions are present on the board and which peripherals are connected to the board's I/0 port. For
example, AT-keyboards draw their power from the keyboard connector on the MICROSPACE MSM586SEV
board, and therefore add keyboard current to the total power drawn by the board from its power supply.
Testenvironment for the powerconsumption measurement:
Peripherie:
Harddisk Hitachi Mod-DK23AA-60 DLAG: 890005
Monitor Compaq Mod-460
CompactFlash ONT-0515-0006 64MB DLAG: 890013
DOC2000 16 MB DLAG:
PS/2-KB Logitech Mod-iTouch Keyboard
PS/2-MS Logitech Mod-M-CAA43
Floppy TEAC Mod-FD-05HF
Software:
MS-DOS v6.22
Win98SE
HCT for Win98 v8.1 PerformanceTesttool from MICROSOFT
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YSTEM
Make sure that the power plug is wired correctly before supplying power to the
board! A built-in diode protects the board against reverse polarity.
5 volts ± 5%; Power-fail signal starts at ± 10 % of 5 volt norm and generates a
reset status for the MICROSPACE PC.
With the harddisk connected to the IDE 44pin interface, the power requirement
is high. The peak current must be enough to spin up the HD-motor. The typical
spin-up current of the harddisk is 0.8 - 1.5Amp at 5V. Too little current will drop
the voltage to under 5 volts for a short time. Due to this undervoltage, the sys-
tem or the harddisk stops or falters. The VGA could also be "snowy".
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MSM586SEN/SEV Manual V1.5E
ESCRIPTION