FLIR
LEPTON® Engineering Datasheet
The information contained herein does not contain technology as defined by the EAR, 15 CFR 772, is publicly available,
and therefore, not subject to EAR. NSR (6/14/2018).
Information on this page is subject to change without notice.
Lepton Engineering Datasheet, Document Number: 500-0659-00-09 Rev: 203
40
4
Interface Descriptions
4.1
Command and Control Interface
Lepton provides a command and control interface (CCI) via a two-wire interface similar to I2C (the only difference
relative to the true I2C standard is that all Lepton registers are 16 bits wide and consequently, only 16-bit
transfers are allowed). The CCI address is 0x2A. The interface is described in detail in a separate document, the
Lepton Software Interface Description Document (IDD), FLIR document #110-0144-04. Generally speaking, all
commands issued through the CCI take the form of a “get” (reading data), a “set” (writing data), or a “run”
(executing a function).
shows a partial list of parameters / features controllable through the CCI. Note
that the “Power
-
On Default” field in the table is not always equivalen
t to the software default described in the
Software IDD as some of the parameters are explicitly configured at the factory for the applicable end use-case.
For example, Lepton 2.5 and 3.5 are radiometric cameras, and therefore the power-on defaults include
Radiometry state enabled, TLinear state enabled, and TLinear resolution of 0.01.
Table 6 - Partial List of Parameters Controllable through the CCI
Parameter
Power-
On
Default
Section in this document
Telemetry
Line Location
AGC Mode
Disabled
page
A3-4
AGC ROI
(0,0,79,59) or
(0,0,159,119)
page
A34-A37
AGC Dampening Factor
64
page
A42
AGC Clip Limit High
4800, 19200
page
A38
AGC Clip Limit Low
512
page
A39
SYS Telemetry Mode
Disabled
page
n/a
SYS Telemetry Location
Footer
page
n/a
SYS Number of Frames
to Average
8
page
A74
SYS Gain Mode
High
page
B5