Datasheet

Table Of Contents
27
MSL2023/2024 [DATASHEET]
42063A–LED–02/2013
13.2 Main String Reference Voltage register (MREF, 0x20)
Holds the DAC value that controls the reference voltage for the main string FET source feedback voltage. The reference
voltage equals decimal value of this register times 2mV. The default value for MSREF is 0x64, which equates to
M
REF
= 200mV.
Table 13-2. Main String Reference register (MREF, 0x20), defaults highlighted.
13.3 Color-Adjust String Reference Voltage register (CAREF, 0x21)
Holds the DAC value that controls the reference voltage for the color-adjust string FET source feedback voltage. The
reference voltage equals decimal value of this register times 2mV. The default value for CAREF is 0x64, which equates
to V
CAREF
= 200mV.
Table 13-3. Color-Adjust String Reference register (CAREF, 0x21), defaults highlighted.
13.4 Fault Disable register (FAULT, 0x22)
Bits D0 and D1 control the fault response for the color-adjust string. For fault response behavior see “Fault Conditions”
on page 18. Bit D2 prevents the thermal shutdown fault from pulling FLTB low. Write 0x03 to this register to clear faults;
write 0x00 to re-enable fault response.
Register name Address
Register data
D7 D6 D5 D4 D3 D2 D1 D0
MREF 0x20 MREF[7:0]
DEFAULT = 0x64: M
REF
= 100 * 2mV = 200mV 01100100
M
REF
= 0 2mV = 0V 00000000
M
REF
= 255 * 2mV = 510mV 11111111
Register name Address
Register data
D7 D6 D5 D4 D3 D2 D1 D0
CAREF 0x21 CAREF[7:0]
DEFAULT = 0x64: V
CAREF
= 100 * 2mV = 200mV01100100
V
CAREF
= 0 2mV = 0mV 00000000
V
CAREF
= 255 2mV = 510mV 11111111