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| LP3952 Datasheet, PDF (16/46 Pages) National Semiconductor (TI) – 6-Channel Color LED Driver with Audio Synchronization | |||
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LP3952
SNVS518A â JULY 2007 â REVISED MARCH 2013
www.ti.com
Transition time TT is duration of transition from the previous RGB value to programmed new value. Transition
times are defined as follows:
TT [2:0]
000
001
010
011
100
101
110
111
The figure below shows an example of RGB CET and TT times.
COMMAND EXECUTION TIME = CET1
TRANSITION TIME = TT1
Transition time, ms
0
55
110
221
442
885
1770
3539
CET2
TT2
CET3
TT3
BLUE
GREEN
RED
TT < CET
The command execution time also may be less than the transition time â the figure below illuminates this case.
TRANSITION TIME = TT1
COMMAND EXECUTION TIME = CET1
TT2
Target values
CET2
CET3
TT3
BLUE
GREEN
RED
TT1 > CET1
TT2 < CET2
TT3 < CET3
LOOP CONTROL (1.65V ⤠VDDIO ⤠VDD1,2V) (unless otherwise noted)
Pattern generator commands can be looped using the LOOP bit (D1) in Pattern gen ctrl register (11H). If
LOOP=1 the program will be looped from the command 8 register or if there is 0000 0000 and 0000 0000 in one
command register. The loop will start from command 1 and continue until stopped by writing rgb_start=0 or
loop=0. The example of loop is shown in following figure:
16
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