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ISL29001
TABLE 1. COMMAND REGISTERS AND FUNCTIONS
COMMAND
8CH
0CH
00H
04H
08H
30H
34H
38H
1xxx_xxxxB
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.
I 2 C communication test. The value written to the command register can be read back via the I 2 C bus.
I 2 C DATA
START
DEVICE ADDRESS 44(HEX) W
A
POWER DOWN CMD 8C(HEX)
A
STOP
I 2 C SDA IN
A6 A5 A4 A3 A2 A1 A0 W A R7 R6 R5 R4 R3 R2 R1 R0
A
I 2 C SDA OUT
SDA DRIVEN BY MASTER
A
SDA DRIVEN BY MASTER
A
I 2 C CLK IN
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
8
9
FIGURE 11A. I 2 C WRITE TIMING DIAGRAM SAMPLE
I 2 C DATA
START
DEVICE ADDRESS 44(HEX) R/W A
LSB OF SENSOR READING
A
MSB OF SENSOR READING
STOP
I 2 C SDA IN
A6 A5 A4 A3 A2 A1 A0 R
A
SDA DRIVEN BY ISL29001
A
SDA DRIVEN BY ISL29001
A
I 2 C SDA OUT
SDA DRIVEN BY MASTER
A D7 D6 D5 D4 D3 D2 D1 D0 A D7 D6 D5 D4 D3 D2 D1 D0 A
I 2 C CLK IN
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
8
9
FIGURE 11B. I 2 C READ TIMING DIAGRAM SAMPLE
FIGURE 11. READ/WRITE TIMING DIAGRAM SAMPLES
6
FN6166.7
November 17, 2011
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