LP3954 Datasheet, PDF (47/60 Pages) National Semiconductor (TI) – Advanced Lighting Management Unit

LP3954
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ADC_OUTPUT (0CH) – ADC DATA REGISTER
D7
D6
D5
D4
D3
data[7:0]
r-0
r-0
r-0
r-0
r-0
SNVS340D – JUNE 2005 – REVISED MARCH 2013
D2
D1
D0
r-0
r-0
r-0
data[7:0]
Bits 7-0
Data register ADC (Audio input, light or temperature sensors)
BOOST_OUTPUT (0DH) – BOOST OUTPUT VOLTAGE CONTROL REGISTER
D7
D6
D5
D4
D3
D2
D1
D0
Boost[7:0]
rw-0
rw-0
rw-1
rw-1
rw-1
rw-1
rw-1
rw-1
Boost[7:0]
Bits 7-0
Boost[7:0]
0000 0000
0000 0001
0000 0011
0000 0111
0000 1111
0001 1111
0011 1111
0111 1111
1111 1111
Adjustment
Typical boost output (V)
4.00
4.25
4.40
4.55
4.70
4.85
5.00 (default)
5.15
5.30
BOOST_FRQ (0EH) – BOOST FREQUENCY CONTROL REGISTER
D7
D6
D5
D4
D3
D2
D1
D0
freq_sel[2:0]
r-0
r-0
r-0
r-0
r-0
rw-1
rw-1
rw-1
freq_sel[2:0]
Bits 7-0
freq_sel[2:0]
1xx
01x
00x
Adjustment
Frequency
2.00 MHz
1.67 MHz
1.00 MHz
HC_FLASH (10H) – HIGH CURRENT FLASH DRIVER CONTROL REGISTER
D7
D6
D5
D4
D3
D2
D1
D0
hc_pwm
fl_t[1:0]
hc[1:0]
en_hcflash
r-0
r-0
rw-0
rw-0
rw-0
rw-0
rw-0
rw-0
hc_pwm
fl_t[1:0]
Bit 5
Bits 4-3
0 – PWM for high current flash driver disabled
1 – PWM for high current flash driver enabled
Flash duration for high current driver
fl_t[1:0]
Typical flash duration
00
200 ms
01
400 ms
10
600 ms
11
According EN_FLASH pin on duration
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