Addi-Data APCI-1710, Technical Description

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Functions of the board APCI-1710
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9 FUNCTIONS OF THE BOARD
9.1 Description
The
APCI-1710
is an extension board for the PCI bus and it is compatible
with the PCI specification 2.1.. The board is used for the processing of
digital signals with focus on “counting and time measurement”.
The digital signals are connected through a 50-pin SUB-D front connector
ST1 to the “function modules “of the
APCI-1710
board. They are separated
optically through opto-couplers.
A second 50-pin connector ST5 is assembled only for the connection of
TTL signals to the board. These signals are not isolated optically from the
PC.
The
APCI-1710
board consists of 4 “function modules” that are assembled
with 4 reprogrammable CPLDs (Complex Programmable Logic Devices).
Digital inputs and outputs are allocated firmly to each function module.
Fig. 9-1: Block diagram of the APCI-1710
The user can reprogram the board without uninstalling it. This has the
following advantages:
-
easy extension of the board’s functionality
-
implementation of customer requests
-
easy download of newly developed functions
-
reduced storage place
-
etc.
The function modules allow to connect digital input and output signals and
to process them on hardware base (in real time) before they are passed to the
PC.