Horner APG XL4 OCS - Manual (Page 81)

MAN0964-01-EN CH.13
June 29, 2012 Page 81 of 122
13.11 Screen Brightness
The XL4 provides a feature that allows screen dimming for night operation. To enable this feature, the
application must access and control system register %SR57 (Display Backlight Brightness). Screen
brightness is continuously variable by driving %SR57 through the range of 100 (full bright) to 0 (full off). It
is left to the screen designer on if and how to present a Screen Brightness control to the user.
Note that backlight life may be shorted when screen is dimmed or screen brightness is varied on a
repetitive basis.
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