ISL29028A_14 Datasheet, PDF (6/16 Pages) Intersil Corporation – Low Power Ambient Light and Proximity Sensor with Intelligent Interrupt and Sleep Modes

ISL29028A
Register Map
There are ten 8-bit registers accessible via I²C. Registers 0x1 and 0x2 define the operation mode of the device. Registers 0x3 through 0x7
store the various ALS/IR/Prox thresholds which trigger interrupt events. Registers 0x8 through 0xA store the results of ALS/IR/Prox ADC
conversions.
TABLE 1. ISL29028A REGISTERS AND REGISTER BITS
BIT
ADDR REG NAME
7
6
5
4
3
2
1
0
DEFAULT
0x00
0x01
0x02
0x03
0x04
0x05
0x06
0x07
0x08
0x09
0x0A
0x0E
0x0F
(n/a)
CONFIGURE
INTERRUPT
PROX_LT
PROX_HT
ALSIR_TH1
ALSIR_TH2
ALSIR_TH3
PROX_DATA
ALSIR_DT1
ALSIR_DT2
TEST1
TEST2
PROX EN
PROX_FLAG
PROX_SLP[2:0]
PROX_PRST[1:0]
ALSIR_HT[3:0]
(Unused)
(Reserved)
PROX_DR
(Write 0)
ALS_FLAG
PROX_LT[7:0]
PROX_HT[7:0]
ALSIR_LT[7:0]
ALSIR_HT[11:4]
PROX_DATA[7:0]
ALSIR_DATA[7:0]
(Write as 0x00)
(Write as 0x00)
ALS_EN
ALS_RANGE
ALS_PRST[1:0]
ALSIR_MODE
INT_CTRL
ALSIR_LT[11:8]
ALSIR_DATA[11:8]
(n/a)
0x00
0x00
0x00
0xFF
0x00
0xF0
0xFF
0x00
0x00
0x00
0x00
0x00
Register Descriptions
BIT #
7:0
ACCESS
(n/a)
DEFAULT
(n/a)
TABLE 2. REGISTER 0x00 (RESERVED)
NAME
FUNCTION/OPERATION
(n/a)
Reserved - no need to read or write
BIT # ACCESS DEFAULT
7
RW
0x00
6:4
RW
0x00
3
RW
0x00
2
RW
0x00
1
RW
0x00
0
RW
0x00
TABLE 3. REGISTER 0x01 (CONFIGURE) - PROX/ALS CONFIGURATION
NAME
FUNCTION/OPERATION
PROX_EN
(Prox Enable)
When = 0, proximity sensing is disabled
When = 1, continuous proximity sensing is enabled. Prox data will be ready 0.54ms after this
bit is set high
PROX_SLP
(Prox Sleep)
For bits 6:4 = (see the following)
111; sleep time between prox IR LED pulses is 0.0ms (run continuously)
110; sleep time between prox IR LED pulses is 12.5ms
101; sleep time between prox IR LED pulses is 50ms
100; sleep time between prox IR LED pulses is 75ms
011; sleep time between prox IR LED pulses is 100ms
010; sleep time between prox IR LED pulses is 200ms
001; sleep time between prox IR LED pulses is 400ms
000; sleep time between prox IR LED pulses is 800ms
PROX_DR
(Prox Drive)
When = 0, IRDR behaves as a pulsed 110mA current sink
When = 1, IRDR behaves as a pulsed 220mA current sink
ALS_EN
When = 0, ALS/IR sensing is disabled
(ALS Enable) When = 1, continuous ALS/IR sensing is enabled with new data ready every 100ms
ALS_RANGE When = 0, ALS is in low-lux range
(ALS Range) When = 1, ALS is in high-lux range
ALSIR_MODE When = 0, ALS/IR data register contains visible ALS sensing data
(ALSIR Mode) When = 1, ALS/IR data register contains IR spectrum sensing data
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FN7721.3
January 29, 2014