Casio IT-2000W manual Setting/Acquisition of ABC Threshold

Setting/Acquisition of ABC Threshold

The ABC (Auto Backlight Control) function is used to sense the ambient light intensity and automatically turns ON/OFF the backlight. This function is used to set marginal levels across which the backlight changes from ON to OFF or from OFF to ON.

If the readout on the AD converter falls below OnValue, the backlight turns on, and if it exceeds OffValue, the backlight turns off. If these two levels are identical or too close each other, the backlight may flicker. To avoid this problem set OnValue so that it is slightly less than OffValue.

SYNTAX

int SYS_SetThresholdOfABC(int OnValue, int OffValue);

INPUT
OnValue =	0 to 255
OffValue =	0 to 255
OUTPUT
= 0	Normal

=- 2 No response from KBC

=- 3 VxD not registered

SYNTAX

int SYS_GetThresholdOfABC(int *OnValue, int *OffValue);

INPUT

OnValue = Pointer to the area in which the ON threshold value is stored.

OffValue = Pointer to the area in which the OFF threshold value is stored.

OUTPUT

= 0 Normal

=-2 No response from KBC

=-3 VxD not registered

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