JAI AD-081GE - Manual (Page 15)

AD-081GE
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8.1.1 LUT (Cross Point Switch)
The LUT works as a cross-point switch which allows connecting inputs and outputs freely. The
signals LVAL_IN, DVAL_IN, FVAL_IN and EEN_IN all originate from the camera timing circuit.
On this diagram, Trigger 0 is used for exposure and Trigger 1 is used for Delayed Readout. The
Time Stamp Reset signal can reset the time stamp specified in GigE Vision Format. This signal
can be used when time stamps from several cameras connected are coincident with each other.
The “Sequence reset” resets the sequential settings. Outputs from the LUT described on the
right side show GPIO settings for LINE SELECTOR in the JAI Camera Control tool and inputs to
the LUT on the left side show GPIO settings for LINE SOURCE in the JAI Camera Control tool.
Refer to Chapter 8.2 GPIO inputs/Outputs table.
8.1.2 12-bit Counter
A camera pixel clock can be used as a source. The counter has a “Divide by N”, where N has the
range 1 through 4096, allowing a wide range of clock frequencies to be programmed. Setting
value 0 is bypass, setting value 1 is 1/2 dividing, and setting value 4095 is 1/4096 dividing. As
the pixel clocks for the AD-081GE are 33.75 MHz, the output frequency is varied from 33.75MHz
to 23.768 KHz.
8.1.3 Pulse Generators (0 to 3)
Each pulse generator consists of a 20-bit counter. The behavior of these signals is defined by
their pulse width, start point and end point.
The pulse generator signals can be set in either triggered or periodic mode.
In triggered mode, the pulse is triggered by the rising edge/falling edge/high level or low level
of the input signal. In periodic mode, the trigger continuously generates a signal that is based
on the configured pulse width, starting point and end point.
Each pulse generator operates at the frequency created in the 12-bit counter. As the pixel
clock (33.75 MHz) is used as the main frequency, the frequency of pulse generator is 33.75 MHz
to 8.24 KHz.
8.1.4 Opto-isolated Inputs/Outputs
The control interface of the C3 GigE Vision camera series has opto-isolated inputs and outputs,
providing galvanic separation between the camera’s inputs/outputs and peripheral equipment.
In addition to galvanic separation, the opto-isolated inputs and outputs can cope with a wide
range of voltages; the voltage range for inputs is +3.3V to +24V DC whereas outputs will handle
+5V to +24V DC.
Fig.10 Photo coupler