Datasheet

LTC3219
12
3219fa
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
UP 0
1
Gradation counts down
Gradation counts up
Quick Write 0
1
Normal write to each register
Quick write, REG1 data is written to all nine universal registers
Force1p5 1
0
Forces charge pump into 1.5x mode
Enables mode logic to control mode charges based on dropout signal
Force2x 1
0
Forces charge pump into 2x mode
Enables mode logic to control mode changes based on dropout signal
Force1x D2 (Force1p5x) = 1
Forces Charge Pump Into 1x Mode
D3 (Force2x) = 1
Reserved X
Reserved X
Reserved X
Unused X
Note: X = Don't Care
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
OPERATION