LTC3219_15 Datasheet, PDF (12/20 Pages) Linear Technology – 250mA Universal Nine Channel LED Driver

LTC3219
OPERATION
Sub-Address Byte
MSB
LSB
7 6 5 4 3 2 1 0 Register Function
X X X X 0 0 0 0 REG0 COMMAND
X X X X 0 0 0 1 REG1 ULED1
X X X X 0 0 1 0 REG2 ULED2
X X X X 0 0 1 1 REG3 ULED3
X X X X 0 1 0 0 REG4 ULED4
X X X X 0 1 0 1 REG5 ULED5
X X X X 0 1 1 0 REG6 ULED6
X X X X 0 1 1 1 REG7 ULED7
X X X X 1 0 0 0 REG8 ULED8
X X X X 1 0 0 1 REG9 ULED9
X X X X 1 0 1 0 REG10
ENU
X X X X 1 0 1 1 REG11 B/G/ENU
REG0, Command Byte, Sub-Address = 0000
MSB
LSB
D7
D6
D5
D4
D3
D2
D1
D0
Unused Reserved Reserved Reserved Force2x Force1p5 Quick Write
UP
UP
0 Gradation counts down
1 Gradation counts up
Quick Write 0 Normal write to each register
1 Quick write, REG1 data is written to all nine universal registers
Force1p5
1 Forces charge pump into 1.5x mode
0 Enables mode logic to control mode charges based on dropout signal
Force2x
1 Forces charge pump into 2x mode
0 Enables mode logic to control mode changes based on dropout signal
Force1x
D2 (Force1p5x) = 1
D3 (Force2x) = 1
Forces Charge Pump Into 1x Mode
Reserved
X
Reserved
X
Reserved
X
Unused
X
Note: X = Don't Care
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