LP3954 Datasheet, PDF (50/60 Pages) National Semiconductor (TI) – Advanced Lighting Management Unit

LP3954
SNVS340D – JUNE 2005 – REVISED MARCH 2013
AUDIO_SYNC_CTRL2 (2BH) – AUDIO SYNCHRONIZATION AND ADC CONTROL REGISTER 2
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D7
D6
D5
D4
D3
D2
D1
D0
en_avg
mode_ctrl[1:0]
speed_ctrl[1:0]
r-0
r-0
r-0
rw-0
rw-0
rw-0
rw-0
rw-0
en_avg
mode_ctrl[1:0]
speed_ctrl[1:0]
Bit 4
Bits 3-2
Bits 1-0
0 – averaging disabled
1 – averaging enabled
Filtering mode control
LEDs light response time to audio input
speed_ctrl[1:0]
Response
00
FASTEST (default)
01
FAST
10
MEDIUM
11
SLOW
PATTERN CONTROL REGISTERS
Command_[1:8]A – Pattern Control Register A
D7
D6
D5
D4
D3
D2
r[2:0]
g[2:0]
rw-0
rw-0
rw-0
rw-0
rw-0
rw-0
D1
D0
cet[3:2]
rw-0
rw-0
D7
D6
cet[1:0]
rw-0
rw-0
Command_[1:8]B – Pattern Control Register B
D5
D4
D3
D2
D1
D0
b[2:0]
tt[2:0]
rw-0
rw-0
rw-0
rw-0
rw-0
rw-0
r[2:0]
Bits
7-5A
r[2:0]
000
001
010
011
100
101
110
111
* _{log bit is in pattern_gen_ctrl register}
Red color intensity
current, %
log=0
0×I_MAX
7%×I_MAX
14%×I_MAX
21%×I_MAX
32%×I_MAX
46%×I_MAX
71%×I_MAX
100%×I_MAX
log=1
0×I_MAX
1%×I_MAX
2%×I_MAX
4%×I_MAX
10%×I_MAX
21%×I_MAX
46%×I_MAX
100%×I_MAX
50
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