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ADDRESS AND
REGISTER NAME
FUNCTION
D7
D6
D5
D4
REGISTER DATA
D3
D2
D1
D0
↓
↓
↓
↓
0xBE
0xBF
0xC0
0xC1
ALTPWM15
E2ADDR
E2CTRLSTA
12-bit
PWM setting
for string 15
EEPROM
read/write
access
-
-
E2BUSY
-
BLDACT
-
E2ERR
-
-
ALTPWM15[7:0]
E2ADDR[6:0]
-
ALTPWM15[11:8]
RWCTRL[2:0]
* Read-Only Registers
Register Power-up Defaults
Register power-up default values are shown in Table 5.
Table 5. Atmel LED Driver-MSL2162 Register Power-Up Defaults
REGISTER NAME
AND ADDRESS
POWER- UP CONDITION
REGISTERS INITIALIZED FROM E2PROM
D7
D6
REGISTER DATA
D5 D4 D3 D2 D1 D0 HEX
0x00
0x01
STRINGEN0
STRINGEN1
All LED String Drive Outputs Enabled
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
FF
FF
String short circuit confirmation delay = 8μs
0x02
CONFIG
String current fold-back disabled
0
0
0
0
0
0
0
0
00
Device is not asleep
FBO open circuit fault detect globally enabled
String open circuit fault detect globally enabled
0x03
FLTEN
LED short circuit fault detect globally enabled
0
0
0
0
0
1
1
1
07
GSC max fault detect globally disabled
PHI max fault detect globally disabled
0x04
0x05
0x0F
STRFLTEN0
STRFLTEN1
OSCFREQ
Fault detection individually enabled
for all strings
f OSC = 20MHz
1
1
0
1
1
0
1
1
0
1
1
0
1
1
0
1
1
1
1
1
0
1
1
0
FF
FF
04
Current sink error confirmation delay = 2 μ s
0x10
FBOCTRL0
FBO power supply settling time allowance = 4ms
Efficiency Optimizer auto-recalibration occurs every 1 second
0
1
0
0
1
0
0
1
49
Efficiency Optimizer headroom steps = 3
MOSFET current sink error detection enabled
0x11
FBOCTRL1
Efficiency Optimizer auto-recalibration enabled
PWM settings used during auto-recalibration
0
0
0
1
1
0
1
0
4A
PWM settings used during initial calibration
Efficiency Optimizer correction step size = 1 LSBs (1μA)
0x12
FBOCTRL2
Efficiency Optimizer initial calibration step size = 1 LSBs (1μA)
FBO outputs are globally enabled
0
0
0
0
0
1
1
1
07
Open circuit detection enabled for both FBO outputs
External signal at GSC is selected for input to the PWM engine
GSC not internally synchronized to PHI
0x20
GSCCTRL
pGSC is synchronized to falling edge of external GSC signal
0
0
0
0
0
0
0
0
00
GSC maximum count fault detect is disabled
Although disabled, GSC max fault monitors pGSC
0x21
0x22
0x23
0x24
0x25
0x26
GSCCNTR
GSCMUL
GSCDIV
GSCMAX
Although disabled, internal GSC frequency is set to
20MHz / (19 + 1) = 1.0MHz
GSC multiplexer output is multiplied by 4 (register setting + 1)
GSC multiplier output is divided by 1 (register setting + 1)
Although disabled, GSC max count is set to 19 clock cycles
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
0
0
0
1
0
0
0
0
0
0
0
0
0
0
0
0
0
1
0
1
0
1
0
1
0
1
0
1
0
13
00
03
00
13
00
22
Atmel LED Driver-MSL2162
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