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
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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). Table 6 shows a partial list of parameters / features controllable through the CCI. Note
that the “Power-On Default” field in the table is not always equivalent 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
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