LP3933 Datasheet, PDF (17/18 Pages) National Semiconductor (TI) – Lighting Management System for Six White LEDs and Two RGB or FLASH LEDs

Control Registers
Control registers and register bits are shown in the following table.
ADDR
REGISTER
D7
D6
D5
D4
D3
D2
D1
D0
00H RGB Control register1 rgb pwm rgb start
rsw1
gsw1
bsw1
rsw2
gsw2
bsw2
01H
red1_on_off
r1_on[3] r1_on[2] r1_on[1] r1_on[0] r1_off[3] r1_off[2] r1_off[1] r1_off[0]
02H
green1_on_off
g1_on[3] g1_on[2] g1_on[1] g1_on[0] g1_off[3] g1_off[2] g1_off[1] g1_off[0]
03H
blue1_on_off
b1_on[3] b1_on[2] b1_on[1] b1_on[0] b1_off[3] b1_off[2] b1_off[1] b1_off[0]
04H
r1slope, r1duty
r1slope[3] r1slope[2] r1slope[1] r1slope[0] r1duty[3] r1duty[2] r1duty[1] r1duty[0]
05H
g1slope, g1duty g1slope[3] g1slope[2] g1slope[1] g1slope[0] g1duty[3] g1duty[2] g1duty[1] g1duty[0]
06H
b1slope, b1duty b1slope[3] b1slope[2] b1slope[1] b1slope[0] b1duty[3] b1duty[2] b1duty[1] b1duty[0]
07H RGB Control register2 cycle[1] cycle[0] r1_pwm g1_pwm b1_pwm r2_pwm g2_pwm b2_pwm
08H
wled control reg
wled_pwm cled_pwm en_wled en_cled
09H
WLED1–4
wled[7] wled[6] wled[5] wled[4] wled[3] wled[2] wled[1] wled[0]
0AH
CLED1–2
cled[7]
cled[6]
cled[5]
cled[4]
cled[3]
cled[2] cled[1] cled[0]
0BH
enables
nstby en_boost en_flash1 en_flash2
0DH
boost output
boost[7] boost[6] boost[5] boost[4] boost[3] boost[2] boost[1] boost[0]
2AH
red2_on_off
r2_on[3] r2_on[2] r2_on[1] r2_on[0] r2_off[3] r2_off[2] r2_off[1] r2_off[0]
2BH
green2_on_off
g2_on[3] g2_on[2] g2_on[1] g2_on[0] g2_off[3] g2_off[2] g2_off[1] g2_off[0]
2CH
blue2_on_off
b2_on[3] b2_on[2] b2_on[1] b2_on[0] b2_off[3] b2_off[2] b2_off[1] b2_off[0]
2DH
r2slope, r2duty
r2slope[3] r2slope[2] r2slope[1] r2slope[0] r2duty[3] r2duty[2] r2duty[1] r2duty[0]
2EH
g2slope, g2duty g2slope[3] g2slope[2] g2slope[1] g2slope[0] g2duty[3] g2duty[2] g2duty[1] g2duty[0]
2FH
b2slope, b2duty b2slope[3] b2slope[2] b2slope[1] b2slope[0] b2duty[3] b2duty[2] b2duty[1] b2duty[0]
Default value of each register is 0000 0000 except boost output which is 0011 1111 = 3Fh (5V).
17
www.national.com