DIGITAL-LOGIC AG
PCCP5 Manual V2.3
21
4 D
ETAILED
S
YSTEM
D
ESCRIPTION
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 separate
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 generates a
reset status for the MICROSPACE PC.
ATTENTION:
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 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, including
what functions are present on the board and what peripherals are connected to the board's I/0 ports. For ex-
ample, 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:
P5-133
133MHz
32 MByte
3.5 A
4.0 A
5 A
Suspended
32 Mbyte
1.6 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 P5 from 100MHz to 200MHz (single 3.3V switched)
Option:
INTEL MMX P5
(dual voltage , switched 2.9V , linear 3.3V I/O)
Option:
AMD K6
(dual voltage , switched 2.9V , linear 3.3V I/O)
Option:
Cyrix M2
(dual voltage , switched 3.1V , linear 3.3V I/O)
The CPU type must be defined by ordering. The switched mode voltage regulator must be tuned to the cor-
rect core voltage of the CPU and the linear 3.3V regulator may be assembled.
