Datasheet

ADP1660 Data Sheet
Rev. 0 | Page 20 of 28
Table 16. Low Battery Mode Enable Register (Register 0x04)
Bits Bit Name Access Description
[7:5] Reserved R/W Reserved.
[4:3]
V_BAT T_WINDOW
R/W
These bits set the window size for low battery detection mode.
00 = window disabled; low battery detection is enabled for the entire flash period.
01 = window enabled for 1 ms.
10 = window enabled for 2 ms.
11 = window enabled for 5 ms (default).
[2:0] V_VB_LO R/W
These bits enable or disable low battery detection and set the battery voltage level at which
the low battery detection function is enabled.
000 = low battery detection disabled (default).
001 = low battery detection enabled at 3.3 V.
010 = low battery detection enabled at 3.35 V.
011 = low battery detection enabled at 3.4 V.
100 = low battery detection enabled at 3.45 V.
101 = low battery detection enabled at 3.5 V.
110 = low battery detection enabled at 3.55 V.
111 = low battery detection enabled at 3.6 V.
Table 17. Low Battery Mode Current Register (Register 0x05)
Bits Bit Name Access Description
[7:6] Reserved R/W Reserved.
[5:0]
I_VB_LO
R/W
These bits set the flash current value for the low battery voltage setting. The current setting
is equal to the value of these six bits multiplied by 12.5 mA (I_VB_LO × 12.5). The maximum
current value is 750 mA.
00 0000 = 0 mA.
00 0001 = 12.5 mA.
…
00 1000 = 100 mA.
…
01 0100 = 250 mA.
…
10 1000 = 500 mA (default).
…
11 1100 = 750 mA.
…
11 1111 = 750 mA.
Table 18. LED1 Flash Current Register (Register 0x06)
Bits
Bit Name
Access
Description
[7:6] Reserved R/W Reserved.
[5:0] I_FL1 R/W
These bits set the flash current value for LED1. The current setting is equal to the value of these
six bits multiplied by 12.5 mA (I_FL1 × 12.5). The maximum current value is 750 mA.
00 0000 = 0 mA.
00 0001 = 12.5 mA.
…
00 1000 = 100 mA.
…
01 0100 = 250 mA.
…
10 1000 = 500 mA (default).
…
11 1100 = 750 mA.
…
11 1111 = 750 mA.