Datasheet

19Atmel LED Driver-MSL3162
Table 5. Atmel LED Driver-MSL3162 Register Power-up Defaults
REGISTER NAME
AND ADDRESS
POWER-UP CONDITION
REGISTER DATA
D7 D6 D5 D4 D3 D2 D1 D0
0x20 PWMCTRL0
PWM is individually controlled by registers PWM0 to
PWM15
GSC low- and high-frequency fault detection is disabled
Over-temperature derating of LED strings is disabled
PHI input falling edge synchronizes LED PWM
Global intensity control uses GINT register
GSC input is divided by value of GSC prescaler register
1 1 0 0 0 0 0 0
0x21 PWMCTRL1
External GSC signal at GSC input pin is used
External PHI signal at PHI input pin is used
PWM input pin is unused
0 0 0 0 0 0 0 0
0x22 SYSTEMP System temperature, SYSTEMP, is 0°C 0 0 0 0 0 0 0 0
0x23 OTTEMP Temperature compensation threshold, OTCOMP, is 255°C 1 1 1 1 1 1 1 1
0x24 OTSLOPE Over-temperature derating slope, OTSLOPE, is 0 0 0 0 0 0 0 0 0
0x25
GSCMAX Maximum GSC pulse count is 65536 (0xFFFF)
1 1 1 1 1 1 1 1
0x26 1 1 1 1 1 1 1 1
0x27
PHIMIN Minimum PHI pulse count is 0
0 0 0 0 0 0 0 0
0x28 0 0 0 0 0 0 0 0
0x29 HPSCR Internal GSC clock is GSC input pin frequency 0 0 0 0 0 0 0 0
0x2A FRATE PHI multiplier is 1 0 0 0 0 0 0 0 1
0x2B GINT Global intensity PWM duty ratio GINT = 16/64 = 25% 0 0 0 0 1 1 1 1
0x30
to
0x3F
ISTR0
to
ISTR15
Individual LED string current I
LED
= 7/63 times the full-scale
current set by external resistor R
ILED
0 0 0 0 0 1 1 1
0x40
to
0x4F
PHDLY0
to
PHDLY15
Individual LED string phase delay t
DLYx
= 0 0 0 0 0 0 0 0 0
0x50
to
0x5F
PWM0
to
PWM15
Individual LED string PWM duty ratio D
PWM
= 1/256 = 0.39% 0 0 0 0 0 0 0 0
0x90 E2ADDR User EEPROM 7-bit address = 0x00 0 0 0 0 0 0 0 0
0x91 E2CTRLSTA User EEPROM read/write is disabled 0 0 0 0 0 0 0 0
Atmel LED Driver-MSL3162
16-string, RGB and White LED Drivers with Adaptive
Power Control and 1MHz I
2
C/SMBus Serial Interface