AS0260CSSC28SUD20 datasheet(31/83 Pages) ONSEMI

31 / 83 page

AS0260 DS Rev. G Pub. 5/15 EN

©Semiconductor Components Industries, LLC, 2015.

AS0260: 1/6-Inch 1080P High-Definition (HD) System-On-A-Chip (SOC) Digi-

tal Image Sensor

Fade to Black Selection

The final stage of the gamma flow is the enabling and use of fade to black. The AS0260

IFP allows for the image to fade to black under extreme low-light conditions. This feature

enables users to optimize the performance of the sensor under low-light conditions. It

minimizes the perception of noise and artifacts while the available illumination is

diminishing.

This feature has two user set points that reference the brightness of the scene. When the

Fade-to-Black starts, it will interpolate to the end point as the light falls until it gets to the

end point. When at the end point, the image will be black.

ON Semiconductor recommends that cam_ll_start_fade_to_black_luma is set at 10 lux

and cam_ll_stop_fade_to_black_luma is set at 5lux, but the actual setting is at the discre-

tion of the user.

Table 8:

Fade-to-Black Selection

Variable

Name

Function

VAR(0x0F,0x0002) or

(R0xBC02)

ll_mode

When bit 3=1 this will enable fade to black feature

VAR(0x12,0x01DA) or

(R0xC9DA)

cam_ll_start_fade_to_black_luma

Starting point for fade to black to begin

VAR(0x12,0x01DC) or

(R0xC9DC)

cam_ll_stop_fade_to_black_luma

End point for fade to black, after this point the image will be black

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