Kontron
PC/104-PCMCIA-1 User’s Guide
13
Power Considerations
8.
POWER CONSIDERATIONS
The PC/104-PCMCIA-1 is a +5V-only board. PCMCIA cards used in the socket could need an
additional voltage (+12V), which is not generated onboard the PC/104-PCMCIA-1. The
power is supplied through power pins on the PC/104 bus connector.
8.1
Power Pins of the PC/104 Bus
Every power pin on the PC/104 bus connectors is limited to a maximum current of 1A per
pin. The following limitations apply whenever a stack of PC/104 boards is supplied through
the PC/104 bus connector:
Power
Number of Pins
Max. Current
VCC (+5V)
4
4A
+12V
2
2A
-12V
2
2A
-5V
2
2A
GND
8
8A
Modules on the PC/104 bus consuming a higher supply current must provide power supply
through an additional connector.
8.2
Power Pins of the PCMCIA Socket
For used PCMCIA sockets, each power pin has a limitation of 500mA (which is also the
specification for the PCMCIA card standard). Therefore PCMCIA cards plugged into the
sockets of the PC/104-PCMCIA-1 are not allowed to exceed the following limitations:
Power
Number of Pins
Max. Current
CDVCC
2
1A
CDVPP1
1
500mA
CDVPP2
1
500mA
GND
4
2A
