ISL29001 Datasheet, PDF (6/11 Pages) Intersil Corporation – Light-to-Digital Sensor

ISL29001
COMMAND
8CH
0CH
00H
04H
08H
30H
34H
38H
1xxx_xxxxB
TABLE 1. COMMAND REGISTERS AND FUNCTIONS
FUNCTION
ADC is powered-down.
ADC is reset.
ADC converts Diode 1’s current (I_DIODE1) into unsigned-magnitude 16-bit data. The integration is internally timed at
100ms per integration.
ADC converts Diode 2’s current (I_DIODE2) into unsigned-magnitude 16-bit data. The integration is internally timed at
100ms per integration.
ADC converts I_DIODE1-I_DIODE2 into 2’s-complement 16-bit data. The total integration is internally timed at 200ms per
integration.
ADC converts Diode 1’s current (I_DIODE1) into unsigned-magnitude 16-bit data. The integration is externally timed; each
30H command sent to the device ends one integration period and begins another.
ADC converts Diode 2’s current (I_DIODE1) into unsigned-magnitude 16-bit data. The integration is externally timed; each
34H command sent to the device ends one integration period and begins another.
ADC converts I_DIODE1-I_DIODE2 into 2’s-complement 16-bit data. The integration is externally timed; each 38H command
sent to the device ends one integration period and begins another.
I²C communication test. The value written to the command register can be read back via the I²C bus.
I²C DATA ^{START DEVICE ADDRESS 44(HEX) W A POWER DOWN CMD 8C(HEX) A}
STOP
I²C SDA IN
A6 A5 A4 A3 A2 A1 A0 W A R7 R6 R5 R4 R3 R2 R1 R0 A
I²C SDA OUT
I²C CLK IN
SDA DRIVEN BY MASTER A SDA DRIVEN BY MASTER A
123 45 6 78 91234 567 89
FIGURE 11A. I²C WRITE TIMING DIAGRAM SAMPLE
I²C DATA START DEVICE ADDRESS 44(HEX) R/W A LSB OF SENSOR READING A MSB OF SENSOR READING
STOP
I²C SDA IN
A6 A5 A4 A3 A2 A1 A0 R A SDA DRIVEN BY ISL29001 A SDA DRIVEN BY ISL29001 A
I²C SDA OUT
I²C CLK IN
SDA DRIVEN BY MASTER A D7 D6 D5 D4 D3 D2 D1 D0 A D7 D6 D5 D4 D3 D2 D1 D0 A
1 2 345 6 7 89 1 23 45 67 89 123 4 567 89
FIGURE 11B. I²C READ TIMING DIAGRAM SAMPLE
FIGURE 11. READ/WRITE TIMING DIAGRAM SAMPLES
6
FN6166.6
December 10, 2008