User`s manual

DIGITAL-LOGIC AG MSLB-P5 Manual V0.3
PRELIMINARY 35
4 DETAILED SYSTEM DESCRIPTION
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 ISA Bus connector, or the PC/104 Power connector, or the sepa-
rate power connector on the board. The supply uses only +5V and ground connection. For backplane
supply and the Flash BIOS operation, the user has to connect the 12V (only for LCD port).
Warning: 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.
Tolerance of 5 V supply: 5Volt ± 5%; Power-fail signal starts at ± 10% of 5 volt nominal and gener-
ates a reset status for the MICROSPACE PC.
ATTENTION: With the harddisk connected to the IDE 44pin interface, the power re-
quirement 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 under 5 volts for a short time. Due
to this undervoltage, the system or the harddisk stops or falters. The VGA
could also be "snowy".
The precise power requirements of the MICROSPACE PCC-P5 depends on a number of factors, in-
cluding what functions are present on the board and what peripherals are connected to the board's I/0
ports. For example, AT-keyboards draw their power from the keyboard connector on the MICRO-
SPACE PCC-P5 board, and therefore add keyboard current to the total power drawn by the board
from its power supply.
CPU: Clock: Memory: no Harddisk HD-500MByte: HD-PowerUp:
P5-166 166MHz 32 MByte 2.3 A 2.8 A 3 A
Suspended 32 Mbyte 1.0 A
HD start current: ST-9096A Seagate 2,5" 80 MBytes ca. 0.8 Amp.
AT-keyboard: ca. 10 mA
4.2 CPUs, Boards and RAMs
4.2.1 CPUs of this MICROSPACE Product
Proposed: Standard: INTEL P55 166 or 266MHz (single 1.8V switched)
The CPU Type must be defined by begin of the order. The CPU may not be changed after the assem-
bly.