Datasheet

19Atmel LED Drivers-MSL3163/MSL3164
Table 3. Atmel LED Drivers-MSL3163/4 Register Power-Up Defaults
REGISTER NAME
AND ADDRESS
POWER-UP CONDITION
REGISTER DATA
D7 D6 D5 D4 D3 D2 D1 D0
0x00 CONTROL0 LED strings STR0 thru STR7 enabled 1 1 1 1 1 1 1 1
0x01 CONTROL1 LED strings STR8 thru STR15 enabled 1 1 1 1 1 1 1 1
0x02 POWERCTRL
Efciency Optimizer outputs enabled
FBO open circuit detection enabled
String open circuit detection enabled
LED short circuit detection enabled
GSC maximum fault detection disabled
PHI minimum fault detection disabled
I
2
C bus timeout detection enabled
Device awake
0 1 0 0 1 1 1 1
0x08 FLTMASK0
Fault detection enabled on all strings
1 1 1 1 1 1 1 1
0x09 FLTMASK1 1 1 1 1 1 1 1 1
0x0A FBOCTRL0
Current sink error conrmation delay = 4µS
FBO power supply correction delay = 2ms
Efciency Optimizer recalibration delay = 1s
Efciency Optimizer correction steps = 6
Current sink error detection not disabled
Auto recalibration enabled
PWM settings used during auto recalibration
PWM duty cycle = 100% during initial calibration
Efciency Optimizer operates using 1µA steps
LED short circuit conrmation delay = 4µs
0 0 0 0 0 0 0 0
0x0B FBOCTRL1 0 0 0 1 0 0 1 0
0x0F ISTR Strings current set to 50% of R
ILED
setting 0 1 1 1 1 1 1 1
0x10 OSCCTRL f
OSC
= 20MHz 0 0 0 0 0 1 0 0
0x11 GSCCTRL
GSC synchronized to the falling edge of the
external signal
0 0 0 0 0 0 0 0
0x12
GSCGEN
Although disabled, Internal GSC frequency =
20MHz / (19 + 1) = 1MHz
0 0 0 1 0 0 1 1
0x13 0 0 0 0 0 0 0 0
0x14 GSCMUL GSC multiplied by 4 0 0 0 0 0 0 1 1
0x15 GSCDIV GSC not divided 0 0 0 0 0 0 0 0
0x16
GSCMAX
Although disabled, GSC max count is set to 19
clock cycles
0 0 0 1 0 0 1 1
0x17 0 0 0 0 0 0 0 0
0x18 PHICTRL
PHI synchronized to the falling edge of the
external signal
0 0 0 0 0 0 0 0
0x19
PHIGEN
Although disabled,
Internal PHI frequency = 20MHz / (8 * (10416 + 1))
= 240Hz
1 0 1 1 0 0 0 0
0x1A 0 0 1 0 1 0 0 0
0x1C
PHIMIN No PHI minimum
0 0 0 0 0 0 0 0
0x1D 0 0 0 0 0 0 0 0
Register Power-Up Defaults
Register power-up default values are shown in Table 3
Atmel LED Drivers-MSL3163 and MSL3164
16-string White & RGB LED Drivers with Adaptive Power
Control, E²PROM, and SPI/I²C/SMBus Serial Interface