FLIR Tau 640 Скачать руководство пользователя страница 43

Страница: 43 / 81

Tau 640 User’s Manual

4—Tau 640 Digital Data Channel

TAU-0640-00-10, version 110

June 2011

4-3

4.2 Discrete I/O

By default the Tau 640 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 can be used with the BT.656 digital
output but are not intended to be compatible with Tau 640 camera using CMOS output. The
discrete control file is defined in Table 4-2.

Note 1

This function is a backward compatible function with Photon. The voltage level of this pin controls the LUT
applied to the analog image. The pin has a pull-up so that the no-connection state is High (3.3 V). When this
pin is high (3.3 V), the analog image will use the White Hot pallet (LUT 1 in the standard LUT file). When this
pin is low (0 V), the analog image will use the Black Hot pallet (LUT 2 in the standard LUT file). The camera
will power up in the saved default state and switch to the discrete input defined state when the pin state is
changed.

Note 2

This function is a backward compatible function with Photon. The voltage level of this pin controls the zoom
state of the analog image. The pin has a pull-up so that the no-connection state is High (3.3 V). When this pin
is high (3.3 V) the analog image will be in the 1x zoom state. When this pin is low (0 V) the analog image will
be in the 2x zoom 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.

Note 3

This function is required for effective use of Shutterless Tau 640 cameras. The application of positive going
edge to this pin shall perform the Do FFC function (0x12 command).

Note 4

This pin is normally at 0 V and changes to 3.3 V when the FFC imminent icon is present on the analog display.
The FFC_Warn_Time command (0x3C) controls both the analog icon and this pin.

Note 5

This function is required to enable additional user control of the camera. The default state is Automatic mode
with the input at 3.3 V held by an internal pull-up. When the signal is pulled to zero volts the camera will
switch into Manual mode. The FFC_Mode_Select (0x11 0=manual, 1=automatic) command has equal
precedence with the discrete pin and the camera will be in the last state set by either the discrete or serial
command. The camera will power up in the saved default state and switch to the discrete input defined state
when the pin state is changed.

Note 6

This function will change the color LUT from the current value to the next LUT in the table when the Discrete
pin transitions from the floating state to the ground state. No LUT change happens on the transition from
ground to float. The LUT state after LUT14 will be LUT1.

Note 7

This function will change the current zoom state from Unzoomed to 2x to 4x to 8x zoom whenever the
discrete pin changes from the float state to the ground state. The Video_Mode command (0x0F) has equal
precedence with this command.

Note 8

Not defined. Connection of either 3.3 V or 0 V to this pin will have no effect on camera operation.

Table 4-2: Discrete Control Functions

50-pin

Connector

30-pin

Connector/

Photon Replicator

Name

Tau 640

Name

Function