ISL29020_14 Datasheet, PDF (4/11 Pages) Intersil Corporation – A Low Power, High Sensitivity, Light-to Digital Sensor With I2C Interface

ISL29020
I²C DATA START
I²C SDA IN
I²C SDA OUT
I²C CLK
DEVICE ADDRESS W A REGISTER ADDRESS
STOP START DEVICE ADDRESS
A
DATA BYTE0
A6 A5 A4 A3 A2 A1 A0 W A R7 R6 R5 R4 R3 R2 R1 R0 A
A6 A5 A4 A3 A2 A1 A0 W A
SDA DRIVEN BY ISL29020
SDA DRIVEN BY MASTER A
SDA DRIVEN BY MASTER A
SDA DRIVEN BY MASTER A D7 D6 D5 D4 D3 D2 D1 D0
12 3456 789123456 789
123 45 67 891 23456789
FIGURE 1. I²C READ TIMING DIAGRAM SAMPLE
I²C DATA
I²C SDA IN
START
I²C SDA OUT
I²C CLK IN
DEVICE ADDRESS
W A REGISTER ADDRESS
A
FUNCTIONS
A STOP
A6 A5 A4 A3 A2 A1 A0 W A R7 R6 R5 R4 R3 R2 R1 R0 A B7 B6 B5 B4 B3 B2 B1 B0 A
SDA DRIVEN BY MASTER
A
SDA DRIVEN BY MASTER
A
SDA DRIVEN BY MASTER
A
1 234 5 67 8 9 1234 56 7 8 9 12 345 67 89
FIGURE 2. I²C WRITE TIMING DIAGRAM SAMPLE
I²C DATA
I²C SDA IN
START
I²C SDA OUT
I²C CLK IN
DEVICE ADDRESS
WA
REGISTER ADDRESS
A STOP
A 6 A5 A4 A3 A2 A1 A0 W A R7 R6 R5 R4 R3 R2 R1 R0 A
SDA DRIVEN BY MASTER
A
SDA DRIVEN BY MASTER
A
1 2 34 5 67 8 9 12 34 56 7 8 9
FIGURE 3. I²C SYNC_I²C TIMING DIAGRAM SAMPLE
4
FN6505.1
August 20, 2009