Discrete I/O - FLIR Tau Camera TAU-0035-00-10 User Manual

Tau User's Manual
4.3

Discrete I/O

By default the Tau camera does not have discrete input functions loaded. The eight discrete
input/output pins with functions are defined by the discrete control file which is available for
download and installation. These functions are not intended to be compatible with Tau cameras
using CMOS output. The signal levels are 0 - 3.3 V CMOS logic and are intended to drive
boards mounted directly to the Tau camera. The discrete control file is defined in Table 4-3.
50-pin
Connector Photon Replicator
19 Pin 29/DIS 1
20 Pin 27/DIS 2
23
24
25
26
3
4
1. This function is a backward compatible function with Photon. The voltage level of this
pin controls the look-up-table (LUT) applied to the analog image. The pin has a pull-up
so that the open state is High (3.3 V). When this pin is High, the analog image will use
the White hot LUT. When this pin is Low, the analog image will use the Black hot LUT.
The camera will power up in the saved default state and switch to the discrete input
defined state when the pin state is changed.
2. This function is a backward compatible function with Photon. The voltage level of this
pin controls the zoom state applied to the analog image. The pin has a pull-up so that
the open state is High (3.3 V). When this pin is High, the analog image will use the
Zoom 1× state. When this pin is Low, the analog image will use the Zoom 2× state.
The camera will power up in the saved default state and switch to the discrete input
defined state when the pin state is changed.
3. This function is required for effective use of shutterless Tau cameras. A positive going
edge pulse to this pin will direct the camera to perform the Do FFC function (0x12).
4. This pin is normally at 0 V and changes to 3.3 V when the FCC imminent icon is pres-
ent on the analog image. The FFC_Warn_time command (0x3C) controls both the an-
alog icon and the state of this pin.
5. This pin is used to enable additional control of the camera. The default state is auto-
matic FFC mode with this pin held at 3.3 V by an internal pull-up. When this pin is
pulled low, the camera will change to Manual FFC mode issuing the FFC_Mode_Select
command (0x11 0=manual, 1=Automatic). The camera will power up in the saved de-
fault state and switch to the discrete input defined state when the pin state is changed.
6. Not defined. Connection of either 3.3 V or 0 V to this pin will not have an effect on
camera operation.
TAU-0035-00-10, version 150
Table 4-3: Discrete Control Functions
30-pin
Connector/
Tau Name
Name
Discrete 0
Discrete 1
Discrete 2
Discrete 3
Discrete 4
Discrete 5
Discrete 6
Discrete 7
June 2011
4—Tau Digital Data Channel
Function Note
White hot/Black hot
Zoom 1×/2×
Do FFC
FCC imminent
FFC mode
Not defined
Not defined
Not defined
1
2
3
4
5
6
6
6
4-5