Datasheet

Data Sheet ADP8866
Rev. A | Page 29 of 52
Bit Name Bit No. Description
D3PWR 2 Diode 3 LED power source select.
1 = the LED is powered from the battery or other power source.
0 = the LED is powered from the charge pump.
D2PWR 1 Diode 2 LED power source select.
1 = the LED is powered from the battery or other power source.
0 = the LED is powered from the charge pump.
D1PWR 0 Diode 1 LED power source select.
1 = the LED is powered from the battery or other power source.
0 = the LED is powered from the charge pump.
BACKLIGHT REGISTER DESCRIPTIONS
Configuration Register (CFGR)—Register 0x10
Table 31. CFGR Bit Map
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
Reserved D9SEL CABCFADE BL_LAW Reserved
Table 32.
Bit Name Bit No. Description
N/A [7:5] Reserved.
D9SEL 4 Diode 9 backlight select.
1 = selects LED9 as part of the independent sinks group.
0 = selects LED9 as part of the backlight group.
CABCFADE 3 Selects how the backlight current responds to changes in its I
2
C setpoint after the backlight is enabled and the fade-
in is complete.
1 = any changes to the backlight current setting (Register 0x13) result in a near instant transition to the new current
level. This is useful when rapid changes to the backlight current are required, such as during cABC control.
0 = any changes to the backlight current setting (Register 0x13) result in a fade to the new current level. The fade
time is determined by the fade rate (set in Register 0x12) and the delta between the old and new current level.
BL_LAW [2:1] Backlight transfer law.
00 = square law DAC, linear time steps.
01 = square law DAC, linear time steps.
10 = square law DAC, nonlinear time steps (Cubic 10).
11 = square law DAC, nonlinear time steps (Cubic 11).
N/A 0 Reserved.
Backlight Select (BLSEL)—Register 0x11
Table 33. BLSEL Bit Map
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
D8SEL D7SEL D6SEL D5SEL D4SEL D3SEL D2SEL D1SEL
Table 34.
Bit Name Bit No. Description
D8SEL 7 Diode 8 backlight select.
1 = selects LED8 as part of the independent sinks group.
0 = selects LED8 as part of the backlight group.
D7SEL 6 Diode 7 backlight select.
1 = selects LED7 as part of the independent sinks group.
0 = selects LED7 as part of the backlight group.
D6SEL 5 Diode 6 backlight select.
1 = selects LED6 as part of the independent sinks group.
0 = selects LED6 as part of the backlight group.