LP5520TL NSC [National Semiconductor], LP5520TL Datasheet - Page 27

• Manufacturer Part Number: LP5520TL
• Description: RGB Backlight LED Driver
• Manufacturer: NSC [National Semiconductor]

LP5520 Registers, Control Bits and Default Values
All registers will have their default value after power-on or reset. Default value for correction registers is 1000 0000 (multiplier =
1). Default value for adaptive voltage control and fast PWM is on. Default value for current set registers is 55H which will set the
current to 20 mA. Default value for all other register bits is 0. Note, that in automatic compensation mode the LED currents are
obtained from the EEPROM.
Bits with r/o are read-only bits.
Register addresses from 40H to 5FH contain the EEPROM page. EEPROM access is described in the Calibration Memory chapter.
ADR
0AH
0BH
0CH
0DH
00H
01H
02H
03H
04H
05H
06H
08H
09H
boost output
G correction
R correction
B correction
REG NAME
control (G)
brightness
control (R)
control (B)
low_byte
EEPROM
current
current
current
hi_byte
Control
control
control
ADC_
ADC_
pwm
rgb
ee_ready
corr_g[7]
corr_b[7]
corr_r[7]
mode[1]
cc_g[7]
cc_b[7]
cc_r[7]
seq_
(r/o)
(r/o)
bit7
D7
ee_erase ee_prog ee_read
corr_g[6] corr_g[5] corr_g[4] corr_g[3] corr_g[2]
corr_b[6] corr_b[5] corr_b[4] corr_b[3] corr_b[2]
corr_r[6]
mode[0]
cc_g[6]
cc_b[6]
cc_r[6]
seq_
(r/o)
bit6
D6
en_fade
corr_r[5] corr_r[4] corr_r[3]
cc_g[5]
cc_b[5]
adc_ch
cc_r[5]
(r/o)
bit5
D5
vprog[4]
cc_g[4]
cc_b[4]
cc_r[4]
comp_
pwm_
(r/o)
fast
bit4
D4
sel
27
rgb_auto
autoload
vprog[3]
cc_g[3]
cc_b[3]
cc_r[3]
brc_off
bit11
(r/o)
(r/o)
en_
bit3
D3
corr_r[2]
vprog[2]
cc_g[2]
cc_b[2]
cc_r[2]
vout_
en_b
bit10
auto
(r/o)
(r/o)
bri2
bit2
D2
en_boost
corr_g[1]
corr_b[1]
ee_page
corr_r[1]
vprog[1]
cc_g[1]
cc_b[1]
cc_r[1]
en_g
(r/o)
(r/o)
bri1
bit9
bit1
D1
[1]
corr_g[0]
corr_b[0]
ee_page
corr_r[0]
vprog[0]
cc_g[0]
cc_b[0]
cc_r[0]
nstby
en_r
(r/o)
(r/o)
bri0
bit8
bit0
D0
[0]
0001 0000
0101 0101
0101 0101
0101 0101
0000 0000
0000 0000
0000 0100
1000 0000
1000 0000
1000 0000
0000 0000
DEFAULT
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