Datasheet

25Atmel LED Drivers-MSL2160/MSL2161
Table 5. Atmel LED Drivers-MSL2160/1 Register Power-up Defaults
Register Power-up Defaults
Register power-up default values are shown in Table 5.
REGISTER NAME
AND ADDRESS
POWER-UP CONDITION
REGISTERS INITIALIZED
FROM EEPROM
REGISTER DATA
D7 D6 D5 D4 D3 D2 D1 D0 HEX
0x00 STRINGEN0
All LED string drive outputs enabled
1 1 1 1 1 1 1 1 FF
0x01 STRINGEN1 1 1 1 1 1 1 1 1 FF
0x02 CONFIG
String short circuit conrmation delay = 256µs
String current fold-back enabled
Device is not asleep
0 0 0 0 1 1 0 1 0D
0x03 FLTEN
FBO open circuit fault detect globally enabled
String open circuit fault detect globally enabled
LED short circuit fault detect globally enabled
GSC max fault detect globally disabled
PHI max fault detect globally disabled
I
2
C timeout enabled
0 0 1 0 0 1 1 1 27
0x04 FLTMASK0
Fault detection individually enabled for all strings
1 1 1 1 1 1 1 1 FF
0x05 FLTMASK1 1 1 1 1 1 1 1 1 FF
0x0F OSCFREQ f
OSC
= 20MHz 0 0 0 0 0 1 0 0 04
0x10 FBOCTRL0
Current sink error conrmation delay = 2µs
FBO power supply settling time allowance = 4ms
Efciency Optimizer auto-recalibration delay = 1s
Efciency Optimizer headroom steps = 3
MOSFET current sink error detection enabled
Efciency Optimizer auto-recalibration enabled
PWM settings used during auto-recalibration
PWM settings used during initial calibration
Efciency Optimizer correction step size = 1 LSB (1µA)
Efciency Optimizer initial calibration step size = 1 LSB (1µA)
FBO outputs globally enabled
Open circuit detection enabled for all three FBO outputs
0 1 0 0 1 0 0 1 49
0x11 FBOCTRL1 0 0 0 1 1 0 1 0 1A
0x12 FBOCTRL2 0 0 0 0 1 1 1 1 0F
0x20 GSCCTRL
External signal at GSC is selected for input to the PWM engine
GSC not internally synchronized to PHI
PWM drive synchronized to falling edge of external GSC
GSC maximum count fault detect is disabled
Although disabled, GSC max fault monitors f
pGSC
0 0 0 0 0 0 0 0 00
0x21
GSCCNTR
Although disabled, internal GSC frequency
f
GGEN
= 20MHz / (80 + 1) = 246kHz
0 1 0 1 0 0 0 0 50
0x22 0 0 0 0 0 0 0 0 00
0x23 GSCMUL GSC multiplexer output is multiplied by 4 (register setting + 1) 0 0 0 0 0 0 1 1 03
0x24 GSCDIV GSC multiplier output is divided by 1 (register setting + 1) 0 0 0 0 0 0 0 0 00
0x25
GSCMAX Although disabled, GSC max count is set to 174 clock cycles
1 0 1 0 1 1 1 0 AE
0x26 0 0 0 0 0 0 0 0 00
Atmel LED Drivers-MSL2160/MSL2161
16-string, White and RGB LED Drivers with Adaptive Configuration,
EEPROM, and SPI/I
2
C/SMBus Serial Interface