Datasheet

19Atmel LED Drivers-MSL1061/MSL1064

Table 7. Atmel LED Drivers-MSL1061/64 Register Power-up Defaults

D7 D6 D5 D4 D3 D2 D1 D0

MSTRCNTRL Run mode 0x00 0 0 0 0 0 0 0 0

CNTRL

Fault detection is enabled

I²C bus timeout is disabled

PWM internal 11MHz clock is used,

prescaled by PWMFREQ

PWM control is by PWM pin.

PWMDUTY register is ignored

0x01 0 0 0 0 0 0 0 1

STATUS

No faults (open, short, or temperature)

are detected

0x03 0 0 0 0 0 0 0 0

OCSTATUS

None of the six LED outputs STR0 to

STR5 has an open circuit fault

0x04 0 0 0 0 0 0 0 0

SCSTATUS

None of the six LED outputs STR0 to

STR5 has a short circuit fault

0x05 0 0 0 0 0 0 0 0

PWMFREQ

Internal PWM frequency is the

maximum 43kHz

0x06 0 0 0 0 0 0 0 0

PWMDUTY Internal PWM duty ratio is 0.39% 0x07 0 0 0 0 0 0 0 0

STREN

All of the six LED outputs STR0 to

STR5 are enabled

0x09 0 0 1 1 1 1 1 1

IDAC

LED string current is 100% of the value

programmed by resistor R5

0x10 0 0 0 0 1 1 1 1

Atmel LED Drivers-MSL1061/MSL1064

6-string PWM LED Driver with Digitally Compensated, 1.1MHz,

48V Boost Regulator, ±1.5% Current Balance, I

C Interface