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ISL29004
Register Set
There are eight registers that are available in the ISL29004.
Table 1 summarizes the available registers and their
functions.
TABLE 1. REGISTER SET
ADDR
REGISTER
(HEX)
00
NAME
Command
Bit(s)
7
FUNCTION NAME
enable
0: disable adc-core
FUNCTIONS/DESCRIPTION
1: enable adc-core
6
5
4
3:2
1:0
adcPD
Timing_Mode
reserved
mode<1:0>
width<1:0>
0: Normal operation
1: Power Down Mode
0: Integration is internally timed
1: Integration is externally sync/controlled by I 2 C host
Selects ADC work mode
0: Diode1’s current to unsigned 16-bit data
1: Diode2’s current to unsigned 16-bit data
2: Difference between diodes (I1 - I2) to signed 15-bit data
3: reserved
number of clock cycles; n-bit resolution
0: 2 16 cycles
1: 2 12 cycles
2: 2 8 cycles
3: 2 4 cycles
01
Control
7
6
5
ext_mode
test_mode
int_flag
Always set to logic 0. Factory use only.
Always set to logic 0
0: Interrupt is cleared or not yet triggered
1: Interrupt is triggered
4
3:2
1:0
reserved
gain<1:0>
int_persist
<1:0>
Always set to logic 0. Factory use only.
Selects the gain so range is
0: 0 - 1000Lux
1: 0 - 4000Lux
2: 0 - 16000Lux
3: 0 - 64000Lux
Interrupt is triggered after
0: 1 integration cycle
1: 4 integration cycles
2: 8 integration cycles
3: 16 integration cycles
02
Interrupt threshold
7:0
Interrupt threshold
High byte of HI interrupt threshold. Default is 0xFF
HI
HI
03
Interrupt threshold
7:0
Interrupt threshold
High byte of the LO interrupt threshold. Default is 0x00
LO
LO
04
LSB_sensor
7:0
LSB_sensor
Read-Only data register that contains the least significant byte of the
latest sensor reading
05
MSB_sensor
7:0
MSB_sensor
Read-Only data register that contains the most significant byte of the
latest sensor reading
06
LSB_timer
7:0
LSB_timer
Read-Only data register that contains the least significant byte of the
timer counter value corresponding to the latest sensor reading.
07
MSB_timer
7:0
MSB_timer
Read-Only data register that contains the most significant byte of the
timer counter value corresponding to the latest sensor reading.
7
FN6221.1
November 17, 2011
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