Datasheet

15Atmel LED Driver-MSL3082
* Read-only registers
Register Power-up Defaults
Register power-up default values are shown in Table 4.
REGISTER NAME
AND ADDRESS
POWER-UP CONDITION
REGISTERS INITIALIZED
FROM EEPROM
REGISTER DATA
D7 D6 D5 D4 D3 D2 D1 D0 HEX
0x00 CONTROL All LED strings drive outputs are enabled 1 1 1 1 1 1 1 1 FF
0x02 POWERCTRL
String phase delay enabled
Efciency Optimizer feedback output enabled
I
2
C bus timeout enabled
Direct PWM disabled
String open circuit detection enabled
String short circuit detection enabled
Device awake
0 1 1 1 0 1 1 1 77
0x03 OSCCTRL Internal oscillator f
OSC
set to 20MHz 0 0 0 0 0 1 0 0 04
0x04 OTTEMP Over-temperature threshold is 90°C 0 1 0 1 1 0 1 0 5A
0x05 SYSTEMP System temperature set to 30°C 0 0 0 1 1 1 1 0 1E
0x06 OTSLOPE Over-temperature slope set to 50°C 0 0 1 1 0 0 1 0 32
0x08 PWMCTRL
PWM operation enabled
String on-times truncated at end of frame
GSC low frequency fault detection disabled
PHI high frequency fault detection disabled
Over-temperature derating of string on times enabled
PWM frame synchronized to rising edge at PHI input
GINT global intensity control enabled
GSC input frequency division disabled
0 1 1 1 0 0 0 1 71
0x0B GINT Global intensity PWM duty cycle GINT = 15/64 = 23.4% 0 0 0 0 1 1 1 1 0F
0x0C GSCDIV GSC input frequency is divided by 2^0 0 0 0 0 0 0 0 0 00
0x0D PHIMUL PHI input frequency is multiplied by 1 0 0 0 0 0 0 0 1 01
0x0E STR03FBO
All strings are monitored by the Efciency Optimizer
1 1 1 1 1 1 1 1 FF
0x0F STR47FBO 1 1 1 1 1 1 1 1 FF
Table 4. Atmel LED Driver-MSL3082 Register Power-up Defaults
REGISTER AND
ADDRESS
FUNCTION
REGISTER DATA
D7 D6 D5 D4 D3 D2 D1 D0
FBODAC* 0x59
Efciency
Optimizer
DAC
readback
FBOACT - - - FBODAC[3:0]
DO NOT ACCESS ADDRESS RANGE 0X58 TO 0X8F
E2ADDR 0x90 User
EEPROM
read/write
access
- E2ADDR[6:0]
E2CTRLSTA 0x91 E2BUSY BLDACT E2ERR - - RWCTRL[1:0]
Atmel LED Driver-MSL3082
8-string, High-power, White or RGB LED Driver for TV,
Blacklighting, or Intelligent Solid-state Lighting