Unibrain Fire-i 580/780/785/980 Operation Manual Page 44
4.3. Pan/Tilt
Pan/Tilt is a function used to move a camera up and down or left and right. However unlike the mechanical Pan /Tilt
which is carried out by physically moving the camera up and down, this functions by using a smaller video mode than
the CCD’s effective pixels and moving the image up and down. This results in a reduced resolution, which the user
can specify by the Pan/Tilt command. Pan/Tilt range and values depend on the characteristic of each CCD used in the
camera respectively as per the following tables. Note that at Format 7 mode, the pan/tilt value must be set at non-
format 7 mode before operation.
4.4. One-Shot and Multi-Shot
This camera supports One-Shot and Multi-Shot features. The camera should be in ISO disabled mode before the
execution of these commands, and if the camera is in ISO enabled mode, these commands are ignored.
One-Shot is used to grab only one frame. Multi-Shot is used to grab 1~65,535 frames.
Caution : One-Shot and Multi-Shots are not supported in trigger mode
One-Shot Multi-Shot
Address F0F0061CH Address F0F0061CH
Data 80000000h Data 4000nnnnh
nnnn is the number of output frames which can be any number between 0001h ~ FFFFh.(1~ 65,535)
Priority of the command execution is as follows. Continuous > One-Shot > Multi-Shot
When a command with higher priority is being executed; the command with lower priority will be ignored
4.5. Multi-Camera Auto-sync
Not supported in 3.75 fps
In applications incorporating multi camera, there is often a need to synchronize the cameras. Multi-Camera Auto
Synchronization is supported utilizing the FireWire bus time cycle register which is connected on the same FireWire bus.
A maximum of 3 cameras can be auto synchronized.
The video mode of the camera must be set within the limit of a single FireWire bus bandwidth of 400Mbps. Also the
maximum shutter value must be set as per the table below not exceeding the FireWire bus cycle time. Jitter may occur
due to CPU operation timing. In the auto-sync mode, the shutter time and the fps should be set as follows
FPS
Fire-i 580 Fire-i 785/780 Fire-i 980
Max Shutter Max Shutter Max Shutter
Value Time Value Time Value Time
60 1110 16.5ms - -
30 1270 32.5ms - -
15 1605 66 ms 1605 66ms 1605 66ms
7.5 1760 131ms 1761 132ms
3.75 1893 264ms 1895 266ms
