ISL97677
REGISTER 0x01
DEVICE CONTROL REGISTER
RESERVED
RESERVED RESERVED RESERVED
RESERVED
PWM_MD PWM_SEL
BL_CTL
Bit 7 (R/W)
Bit 6 (R/W)
Bit 5 (R/W)
Bit 4 (R/W)
Bit 3 (R/W)
Bit 2 (R/W) Bit 1 (R/W) Bit 0 (R/W)
BIT ASSIGNMENT
PWM_MD
PWM_SEL
BL_CTL
REGISTER 0x02
BIT FIELD DEFINITIONS
= PWM mode select bit (1 = absolute
brightness, 0 = % change) default = 0
= Brightness control select bit (1 = control
by PWMI, 0 = control by SMBus) default = 0
= BL On/Off (1 = On, 0 = Off) default = 0
FIGURE 31. DESCRIPTIONS OF DEVICE CONTROL REGISTER
FAULT/STATUS REGISTER
RESERVED
RESERVED
2_CH_SD
1_CH_SD
BL_STAT
OV_CURR THRM_SHDN
FAULT
Bit 7 (R)
Bit 6 (R)
Bit 5 (R)
Bit 4 (R)
Bit 3 (R)
Bit 2 (R)
Bit 1 (R)
Bit 0 (R)
BIT
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
BIT ASSIGNMENT
2_CH_SD
1_CH_SD
BL_STAT
OV_CURR
THRM_SHDN
FAULT
BIT FIELD DEFINITIONS
= Two LED output channels are shutdown (1 = shutdown, 0 = OK)
= One LED output channel is shutdown (1 = shutdown, 0 = OK)
= BL Status (1 = BL On, 0 = BL Off)
= Input Overcurrent (1 = Overcurrent condition, 0 = Current OK)
= Thermal Shutdown (1 = Thermal Fault, 0 = Thermal OK)
= Fault occurred (Logic “OR” of all of the fault conditions)
FIGURE 32. DESCRIPTIONS OF FAULT/STATUS REGISTER
REGISTER 0x03
LED
ID REGISTER
PANEL
Bit 7 = 1
MFG3
Bit 6 (R)
MFG2
Bit 5 (R)
MFG1
Bit 4 (R)
MFG0
Bit 3 (R)
REV2
Bit 2 (R)
REV1
Bit 1 (R)
REV0
Bit 0 (R)
BIT ASSIGNMENT
MFG[3..0]
REV[2..0]
21
BIT FIELD DEFINITIONS
= Manufacturer ID. See “Identification
Register (0x03)” on page 19.
Data 0 to 8 in decimal correspond to other
vendors data 9 in decimal represents Intersil
ID data 10 to 14 in decimal are reserved
data 15 in decimal Manufacturer ID is not
implemented
= Silicon rev (Rev 0 through Rev 7 allowed
for silicon spins)
FIGURE 33. DESCRIPTIONS OF ID REGISTER
FN6996.1
November 13, 2009
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