Pc/104 bus interface – ADLINK CM3-GF User Manual

Page 53

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TME-104P-CMx-GF-1V7

Rev 1.7

45 (81)

Note:

All VI/O pins are connected to +3.3V.
The voltages +5V, +12V and -12V are not generated by the on-board
power supply but routed from the power supply connector. The
maximum current is limited to 1.0A for each

voltage

.

3.16 PC/104 Bus Interface

The PC/104 bus is a modification of the industry standard (ISA) PC bus specified in IEEE P996. The PC/104 bus
has different mechanics than P966 to allow the stacking of modules. The main features are:

Supports programmable extra wait state for ISA cycles

Supports I/O recovery time for back-to-back I/O cycles

The following table shows the pin assignments of the PC/104 connector.

Note:

-5 V on the PC/104 connector are not supported on this board.

The voltages +5V, +12V and -12V are not generated by the on-board
power supply but routed from the power supply connector. The
maximum current is limited to 1.0A for each

voltage.

20

GND

AD26

AD25

GND

21

AD29

+5V

AD28

AD27

22

+5V

AD30

GND

AD31

23

REQ0#

GND

REQ1#

VI/O

24

GND

REQ2#

+5V

GNT0#

25

GNT1#

VI/O

GNT2

GND

26

+5V

CLK0

GND

CKL1

27

CLK2

+5V

CLK3

GND

28

GND

INTD#

+5V

RST#

29

+12V

INTA#

INTB#

INTC#

30

-12V

REQ3#

GNT3#

GND

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