Datasheet

LTC3220/LTC3220-1
12
32201fc
OPERATION
Sub-Address Byte
MSB LSB
7 6 5 4 3 2 1 0 Register Function
0 0 0 0 0 0 0 0 REG0 COMMAND
00000001REG1 ULED1
00000010REG2 ULED2
00000011REG3 ULED3
00000100REG4 ULED4
00000101REG5 ULED5
00000110REG6 ULED6
00000111REG7 ULED7
00001000REG8 ULED8
00001001REG9 ULED9
0 0 0 0 1 0 1 0 REG10 ULED10
00001011REG11ULED11
00001100REG12ULED12
00001101REG13ULED13
00001110REG14ULED14
00001111REG15ULED15
00010000REG16ULED16
00010001REG17ULED17
00010010REG18ULED18
00010011REG19GRAD/
BLINK
Register Sub-Address = 0000
MSB LSB
D7 D6 D5 D4 D3 D2 D1 D0
Unused Unused Unused Unused Shutdown Force2x Force1p5x Quick write
Quick write 0
1
Serial write to each register
Parallel write, REG1 data is written to all eighteen universal registers
Force1p5 1
0
Forces charge pump into 1.5x mode
Enables mode logic to control mode changes 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
Shutdown 1
0
Shuts down part while preserving data in registers
Normal operation
REG0, Command Byte.