Datasheet

ADP5520
Rev. A | Page 26 of 40
Bit Mnemonic R/W Description
0 L2_EN R/W 0 = disable Comparator L2_CMPR.
1 = enable Comparator L2_CMPR. If automatic backlight adjustment is required, BL_AUTO_ADJ
must be set also.
Table 21. Register 0x0D, Level 2 (Office) Comparator Trip Point (L2_TRIP)
Bit Mnemonic R/W Description
7 to 0 L2_TRIP R/W
Sets the trip value for Comparator L2_CMPR. If ambient light levels fall below this trip point,
L2_OUT is set. Each code is equal to 4 µA (typical). Full scale is 1000 µA (typical).
Table 22. Register 0x0E, Level 2 (Office) Comparator Hysteresis (L2_HYS)
Bit Mnemonic R/W Description
7 to 0 L2_HYS R/W
Sets the hysteresis value for Comparator L2_CMPR. If ambient light levels increase above L2_TRIP +
L2_HYS, then L2_OUT is cleared. Each code is equal to 4 µA (typical). Full scale is 1000 µA (typical).
Table 23. Register 0x0F, Level 3 (Dark) Comparator Trip Point (L3_TRIP)
Bit Mnemonic R/W Description
7 to 0 L3_TRIP R/W
Sets the trip value for Comparator L3_CMPR. If ambient light levels fall below this trip point,
L3_OUT is set. Each code is equal to 0.5 µA (typical). Full scale is 127 µA (typical).
Table 24. Register 0x10, Level 3 (Dark) Comparator Hysteresis (L3_HYS)
Bit Mnemonic R/W Description
7 to 0 L3_HYS R/W
Sets the hysteresis value for Comparator L3_CMPR. If ambient light levels increase above L3_TRIP +
L3_HYS, then L3_OUT is cleared. Each code is equal to 0.5 µA (typical). Full scale is 127 µA (typical).
Table 25. Register 0x11, LED Control (LED_CONTROL)
Bit Mnemonic R/W Description
7 to 6 Unused.
5 R3_MODE R/W 0 = R3 is configured as a current sink (LED 3).
1 = R3 is configured as a GPIO (D3).
4 C3_MODE R/W 0 = C3 is configured as a current sink (LED 2).
1 = C3 is configured as a GPIO (D7).
3 LED_LAW R/W LED current sink fade-on/fade-off transfer characteristic.
0 = linear.
1 = square.
2 LED3_EN 0 = LED 3 is disabled.
1 = LED 3 is enabled.
1 LED2_EN 0 = LED 2 is disabled.
1 = LED 2 is enabled.
0 LED1_EN 0 = LED 1 is disabled.
1 = LED 1 is enabled.
Table 26. Register 0x12, Auxiliary LED On and Off Timers (LED_TIME)
Bit Mnemonic R/W Description
7 to 6 LED_ONT R/W
Sets the LED on time when used in conjunction with the LEDx_OFFT timer to perform LED
blinking. All three LED sinks share this common timer.
00 = 0.2 sec.
01 = 0.6 sec.
10 = 0.8 sec.
11 = 1.2 sec.
5 to 4 LED3_OFFT R/W
Sets the LED 3 off time when used in conjunction with the LED_ONT timer to perform LED
blinking. LED 3 stays on continuously if the timer is disabled.
00 = LED 3 timer disabled.
01 = 0.6 sec.
10 = 0.8 sec.
11 = 1.2 sec.