LP8501 Datasheet, PDF (31/51 Pages) National Semiconductor (TI) – Multi-Purpose 9-Output LED Driver

LP8501
www.ti.com
SNVS548D – SEPTEMBER 2008 – REVISED AUGUST 2013
LP8501 Registers
The LP8501 is controlled by a set of registers through the two-wire serial interface port. Some register bits are
reserved for future use. The table below lists device registers, their addresses, and their abbreviations. A more
detailed description is given in section.
Hex
Address
00
Register Name
ENABLE / ENGINE
CNTRL1
01
ENGINE CNTRL2
02
GROUP 1 FADING
03
GROUP 2 FADING
04
GROUP 3 FADING
05
POWER CONFIG
06
D1 CONTROL
07
D2 CONTROL
08
D3 CONTROL
09
D4 CONTROL
0A
D5 CONTROL
Table 5. Control Register Map
Bit(s)
[6]
[5:4]
[3:2]
[1:0]
[5:4]
[3:2]
[1:0]
[7:4]
[3:0]
[7:4
[3:0]
[7:4
[3:0]
[1]
[0]
[7:6]
[5]
[7:6]
[5]
[7:6]
[5]
[7:6]
[5]
[7:6]
[5]
Read/Wr Default Value
ite
After Reset
R/W x0xxxxxx
R/W xx00xxxx
R/W xxxx00xx
R/W xxxxxx00
R/W xx00xxxx
R/W xxxx00xx
R/W xxxxxx00
R/W 0000xxxx
R/W xxxx0000
R/W 0000xxxx
R/W xxxx0000
R/W 0000xxxx
R/W xxxx0000
R/W xxxxxx0x
R/W xxxxxxx0
R/W 00xxxxxx
R/W xx0xxxxx
R/W 00xxxxxx
R/W xx0xxxxx
R/W 00xxxxxx
R/W xx0xxxxx
R/W 00xxxxxx
R/W xx0xxxxx
R/W 00xxxxxx
R/W xx0xxxxx
Bit Mnemonic and Description
CHIP_EN
0 = LP8501 not enabled
1 = LP8501 enabled
ENGINE1_EXEC
Engine 1 program execution control
ENGINE2_EXEC
Engine 2 program execution control
ENGINE3_EXEC
Engine 3 program execution control
ENGINE1_MODE
ENGINE 1 mode control
ENGINE2_MODE
ENGINE 2 mode control
ENGINE3_MODE
ENGINE 3 mode control
FADE_IN
Fade-in time for group 1 fader
FADE_OUT
Fade-in time for group 1 fader
FADE_IN
Fade-in time for group 2 fader
FADE_OUT
Fade-in time for group 2 fader
FADE_IN
Fade-in time for group 3 fader
FADE_OUT
Fade-in time for group 3 fader
CHP_CON_1_6
D1 to D6 power selection
CHP_CON_7_9
D7 to D9 power selection
GROUP_SELECT
Fader group selection for D1 output
LOG_EN
Logarithmic dimming control for D1
GROUP_SELECT
Fader group selection for D2 output
Logarithmic dimming control for D2 output
GROUP_SELECT
Fader group selection for D3 output
LOG_EN
Logarithmic dimming control for D3 output
GROUP_SELECT
Fader group selection for D4 output
LOG_EN
Logarithmic dimming control for D4 output
GROUP_SELECT
Fader group selection for D5 output
LOG_EN
Logarithmic dimming control for D5 output
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