ISG LW-3-S-1394, Руководство пользователя

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Copyright, 2004 Imaging Solutions Group
of NY
, Inc., All Rights Reserved
Revision 2.1 Subject to change without notice.
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Section 2: Connectors and Trigger Modes
Section 2.1:
ISG Camera Module Triggering Description
The ISG camera module provides a variety of triggering modes and flexibility using features
internal to the FPGA controller as well as the sensor. For a more detailed description of the
registers referenced in this document see the Programmers Reference manual.
Register Description:
Trigger Delay – A 16 bit value used to delay the start of integration from the active edge of the
input trigger. This value can be programmed in steps of 20.83us to a maximum value of 1.37s.
Strobe Advance – This 8 bit register is used to apply the strobe signal a programmed amount of
time before the start of sensor integration to allow for illumination turn on time. This value can be
programmed in steps of 5.21us to a maximum value of 1.33ms. Note: The trigger delay must be
greater then the strobe advance.
Strobe Delay – This 16 bit register is used to delay the strobe signal a programmed amount of
time after the start of sensor integration. This delay is intended for use with flash illumination
devices. This value can be programmed in steps of .65us to a maximum value of 42.7ms. Note:
The strobe delay must not exceed the integration time of the sensor. If a value is programmed for
Strobe Advance the Strobe Delay value will be ignored.
Retrigger Delay – The 16 bit value in this register is used to program the time between
integration intervals when in Retrigger Mode. This value can be programmed in steps of 5.2us to
a maximum value of 341ms.
Strobe Duration - This register is used to program the duration of the strobe pulse when strobe
duration mode is enabled. This value can be programmed in steps of 5.2us to a maximum value of
341ms. Note: The strobe output will go inactive at the end of sensor integration no mater what
the strobe duration is set to.
Trigger and Strobe Description:
The input trigger sense can be active low or high. A software trigger is also available to the
programming interface (Host Mode) as well as a trigger status bit. The strobe output is intended
to control an illumination system and can be selected to be active low or high as well as always
high or always low. The diagrams on the following pages show the trigger as active low and the
strobe as active high.