Kontron CP372 - Manual (Page 32)

Functional Description CP372
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P R E L I M I N A R Y
output signals and then presents these to the signal conditioning functions for appropriate pro-
cessing before being made available to the front panel interface.
2.1.3 Optocouplers
The CP372 provides full galvanic isolation between the process and application control system.
This is accomplished by the use of optocouplers for all data and control signal lines between
the DAC ProComm controller and the DACs and signal conditioning functions.
Signals directly supplied to the DACs are isolated using special high speed dual optocouplers.
Signals supplied to the signal conditioning functions are isolated using standard quad or single
optocouplers as required.
2.1.4 DAC ProComm Controller
Within the CP372, the DAC ProComm controller is responsible for supervising and controlling
the analog signal generation process and providing communications with the CompactPCI sys-
tem master. Applications address the CP372 through its software driver interface within the
system master whereby the controller accepts requests and digital output data from the driver,
processes both of them accordingly, and supervises the digital to analog conversion process
and the signal conditioning functions.
2.1.5 System Interfaces
The CP372 provides interfacing capability for the following system elements:
• Analog output
• CompactPCI bus
• Test and program development: JTAG/ISP
Analog output interfacing is achieved via the CON2 connector. Interfacing to the CompactPCI
bus is accomplished via the CON1 connector. Test and program development is supported by
the CON3 connector.
2.1.6 Monitor and Control
Various monitor and control functions are available for the operation of the CP372. Two cluster
operational status LED’s and an external cluster enable/disable function are available for oper-
ator interaction. In addition, applications have access via the System Master driver software to
board specific registers.
2.1.7 Software
Driver software is available for the System Master application software.
2.2 Board-Level Interfacing Diagram
The following figure demonstrates the interfacing structure between the internal processing
modules of the CP372 and other major CP372 system components. Where CP372 system el-
ements have common interfacing they are grouped into a block. Interfacing common to only
one element of a block is indicated with a direct connecting line. The interfacing lines are shown
in white where they are on board and in black for board external interfacing.