LP3958 Datasheet, PDF (25/28 Pages) National Semiconductor (TI) – Lighting Management Unit with High Voltage Boost Converter

LP3958 Register Bit Explanations (Continued)
KEYPAD MAX CURRENT (02H) – MAXIMUM KEYPAD CURRENT CONTROL REGISTER
D7
R-0
D6
R-0
D5
D4
IK1[1:0]
RW - 0
RW - 0
D3
D2
IK2[1:0]
RW - 0
RW - 0
D1
D0
IK3[1:0]
RW - 0
RW - 0
Maximum current for KEY1,2,3 driver
IK1,2,3[1:0]
Maximum output current
00
0.25 x I_MAX
01
0.50 x I_MAX
10
0.75 x I_MAX
11
1.00 x I_MAX
WLED CONTROL (03H) – WLED CONTROL REGISTER
D7
R-0
D6
R-0
D5
SLOPE
RW - 0
D4
FADE_SEL
RW - 0
D3
EN_FADE
RW - 0
D2
DISPL
RW - 0
D1
EN_MAIN
RW - 0
D0
EN_SUB
RW - 0
SLOPE
FADE_SEL
EN_FADE
DISPL
EN_MAIN
EN_SUB
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
0 – fade execution time 0.65 sec (full scale)
1 – fade execution time 1.3 sec (full scale)
0 – fade control for MAIN
1 – fade control for SUB
0 – automatic fade disabled
1 – automatic fade enabled
0 - MAIN and SUB individual control
1 - MAIN and SUB controlled with MAIN DAC
0 – MAIN output disabled
1 – MAIN output enabled
0 – SUB output disabled
1 – SUB output enabled
25
www.national.com