Datasheet

LTC3220/LTC3220-1
13
32201fc
Blink Times and Period Gradation Ramp Times and Period
D4 (GB4) D3 (GB3) On Time Period D2 (GB2) D1 (GB1) Ramp Time Period
0
0
1
1
0
1
0
1
0.625s
0.156s
0.625s
0.156s
1.25s
1.25s
2.5s
2.5s
0
0
1
1
0
1
0
1
Disabled
0.24s
0.48s
0.96s
Disabled
0.313s
0.625s
1.25s
REG19, Gradation and Blinking
MSB LSB
D7 D6 D5 D4 D3 D2 D1 D0
Unused Unused Unused GB4 GB3 GB2 GB1 Up
Sub-Address 00001 to 10010 per Sub-Address Table
Blink/Gradation/Dropout Enable LED Current Data
MSB LSB
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
Normal
Blink Enabled
Gradation Enabled
GPO Mode*
Strong Pull-Down Mode
Current Limited Mode
High Impedance/Off
*(Gradation/Blink/Dropout Off)
0
0
1
1
1
0
0
1
0
1
1
0
D5
D5
D5
0
D5
0
D4
D4
D4
0
D4
0
D3
D3
D3
0
D3
0
D2
D2
D2
0
D2
0
D1
D1
D1
0
D1
0
D0
D0
D0
0
D0
0
Data Bytes
REG1 to REG18, Universal LED 6-bit linear DAC data with
blink/gradation.
Up 0
1
Gradation counts down
Gradation counts up
OPERATION