Datasheet

ADP8861 Data Sheet
Rev. B | Page 28 of 40
Backlight Fade (BLFR)—Register 0x08
Table 24. BLFR Bit Map
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
BL_FO BL_FI
Table 25. Bit Descriptions for the BLFR Register
Bit Name Bit No. Description
BL_FO [7:4]
Backlight fade out rate. If fade out is disabled (BL_FO = 0000), the backlight changes instantly (within 100 ms). If the
fade out rate is set, the backlight fades from its current value to the dim or the off value. The times listed for BL_FO
are for a full-scale fade out (30 mA to 0 mA). Fades between closer current values reduce the fade time. See the
Automated Fade In and Fade Out section for more information.
0000 = 0.1 sec (fade out disabled)
1
0001 = 0.3 sec
0010 = 0.6 sec
0011 = 0.9 sec
0100 = 1.2 sec
0101 = 1.5 sec
0110 = 1.8 sec
0111 = 2.1 sec
1000 = 2.4 sec
1001 = 2.7 sec
1010 = 3.0 sec
1011 = 3.5 sec
1100 = 4.0 sec
1101 = 4.5 sec
1110 = 5.0 sec
1111 = 5.5 sec
BL_FI
[3:0]
Backlight fade in rate. If fade in is disabled (BL_FI = 0000), the backlight changes instantly (within 100 ms). If the fade
in rate is set, the backlight fades from its current value to its maximum value when the backlight is turned on. The
times listed for BL_FI are for a full-scale fade in (0 mA to 30 mA). Fades between closer current values reduce the fade
time. See the
Automated Fade In and Fade Out section for more information.
0000 = 0.1 sec (fade in disabled)
1
0001 = 0.3 sec
0010 = 0.6 sec
0011 = 0.9 sec
…
1111 = 5.5 sec
1
When fade in and fade out are disabled, the backlight does not instantly fade, but instead, fades rapidly within about 100 ms.