Imager Startup Timing; Led Power Supply Startup Timing; Image Acquisition Timeline - Hand Held Products IT4000 Integration Manual

Imager Startup Timing

The following example shows a typical imager startup and two image capture sequences. The actual startup time for any given
system changes due to power supply impedance and rise times.
Vin_imager
Vertical
2
I C
Power Enable
0ms 20ms 40ms 60ms 80ms 100ms 120ms 140ms

LED Power Supply Startup Timing

The following is a timing example of the LED power supply startup. The LED power supply startup time can vary by +/-20% due
to power supply impedance and rise times.
LED
Switcher
Voltage
Illumination On
or
Aimer On
0µs 50µs 100µs 150µs 200µs 250µs 300µs 350µs

Image Acquisition Timeline

The following is graphical timing reference of the image acquisition for the IT4X00 Series engines using the Hand Held Products
windowed acquisition configuration. The figure shows details of the I2C and line data events which are required by the hardware
and image acquisition software layers. The line data events can be generated in the hardware based on the horizontal (row)
counts or via timers provided by the host operating system. The figure references two different methodologies of line data events
(LDE) that may be used. The most commonly used LDE is the equal interval method, where the image acquisition is broken up
into equal time slots. The back end weighted method can provide additional power savings, but is more difficult to implement.
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