isl29028 Intersil Corporation, isl29028 Datasheet - Page 6

• Manufacturer Part Number: isl29028
• Description: Low Power Ambient Light And Proximity Sensor With Intelligent Interrupt And Sleep Modes
• Manufacturer: Intersil Corporation

Register Map
There are ten 8-bit registers accessible via I
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.
Register Descriptions
ADDR REG NAME
BIT #
0x00
0x01
0x02
0x03
0x04
0x05
0x06
0x07
0x08
0x09
0x0A
0x0E
0x0F
BIT #
6:4
7
3
2
1
0
7:0
CONFIGURE
PROX_DATA
INTERRUPT
ALSIR_TH1
ALSIR_TH2
ALSIR_TH3
ALSIR_DT1
ALSIR_DT2
PROX_HT
PROX_LT
ACCESS DEFAULT
TEST1
TEST2
(n/a)
RW
RW
RW
RW
RW
RW
ACCESS
RO
PROX_FLAG
PROX EN
0x00
0x00
0x00
0x00
0x00
0x00
TABLE 3. REGISTER 0x01 (CONFIGURE) - PROX/ALS CONFIGURATION
7
DEFAULT
(n/a)
6
(ALSIR Mode)
(Prox Enable)
ALSIR_MODE
(ALS Enable)
(Prox Sleep)
(ALS Range)
(Prox Drive)
ALS_RANGE
PROX_SLP
PROX_EN
PROX_DR
TABLE 1. ISL29028 REGISTERS AND REGISTER BITS
ALS_EN
NAME
PROX_PRST[1:0]
6
ALSIR_HT[3:0]
(Unused)
TABLE 2. REGISTER 0x00 (RESERVED)
PROX_SLP[2:0]
NAME
(n/a)
2
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
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
When = 0, IRDR behaves as a pulsed 110mA current sink
When = 1, IRDR behaves as a pulsed 220mA current sink
When = 0, ALS/IR sensing is disabled
When = 1, continuous ALS/IR sensing is enabled with new data ready every
100ms
When = 0, ALS is in low-lux range
When = 1, ALS is in high-lux range
When = 0, ALS/IR data register contains visible ALS sensing data
When = 1, ALS/IR data register contains IR spectrum sensing data
C. Registers 0x1 and 0x2 define the operation mode of the device.
5
ISL29028
(Write 0)
Reserved - no need to read or write
ALSIR_DATA[7:0]
PROX_DATA[7:0]
ALSIR_HT[11:4]
4
(Write as 0x00)
(Write as 0x00)
PROX_HT[7:0]
ALSIR_LT[7:0]
PROX_LT[7:0]
(Reserved)
ALS_FLAG
PROX_DR
BIT
3
FUNCTION/OPERATION
FUNCTION/OPERATION
ALS_EN
ALSIR_DATA[11:8]
2
ALS_PRST[1:0]
ALSIR_LT[11:8]
ALS_RANGE ALSIR_MODE
1
INT_CTRL
0
March 2, 2010
DEFAULT
(n/a)
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0xFF
0xF0
0xFF
FN6780.1