ISL29011_14 Datasheet, PDF(10/19 Page) Intersil Corporation – Digital Ambient Light Sensor and Proximity Sensor with Interrupt Function

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ISL29011_14 Datasheet, PDF (10/19 Pages) Intersil Corporation – Digital Ambient Light Sensor and Proximity Sensor with Interrupt Function

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ISL29011

There are eight registers that are available in the ISL29011.

Table 1 summarizes their functions.

TABLE 1. REGISTER SET

BIT

ADDR REG NAME

00h COMMANDI

OP2

OP1

OP0

01h COMMANDII Scheme

FREQ

IS1

IS0

RES1

02h

DATALSB

03h

DATAMSB

D15

D14

D13

D12

D11

04h INT_LT_LSB

TL7

TL6

TL5

TL4

TL3

05h INT_LT_MSB TL15

TL14

TL13

TL12

TL11

06h INT_HT_LSB

TH7

07h INT_HT_MSB TH15

TH6

TH14

TH5

TH13

TH4

TH12

TH3

TH11

08h

TEST

FLAG

RES0

D10

TL2

TL10

TH2

TH10

PRST1

RANGE1

TL1

TL9

TH1

TH9

PRST0

RANGE0

TL0

TL8

TH0

TH8

DEFAULT

00h

FFh

00h

Command Register I 00 (hex)

The first command register has the following functions:

1. Operation Mode; Bits 7, 6, and 5: These three bits are

determine the operation mode of the device.

TABLE 2. OPERATION MODE

BITS 7 TO 5

OPERATION

000

Power-down the device

001

ALS once

010

IR once

011

Proximity once

100

Reserved (Do not use)

101

ALS continuous

110

IR continuous

111

Proximity continuous

2. Interrupt flag; Bit 2: This is the status bit of the interrupt. The bit

is set to logic high when the interrupt thresholds have been

triggered, and logic low when not yet triggered. Once triggered,

INT pin stays low and the status bit stays high. Both interrupt

pin and the status bit are automatically cleared at the end of

Command Register I transfer.

TABLE 3. INTERRUPT FLAG

BIT 2

OPERATION

Interrupt is cleared or not triggered yet

Interrupt is triggered

3. Interrupt persist; Bits 1 and 0: The interrupt pin and the

interrupt flag is triggered/set when the data sensor reading is

out of the interrupt threshold window after m consecutive

number of integration cycles. The interrupt persist bits

determine m.

BITS 1 TO 0

TABLE 4. INTERRUPT PERSIST

NUMBER OF INTEGRATION CYCLES

Command Register II 01 (hex)

The second command register has the following functions:

1. Proximity Sensing Scheme; Bit 7: This bit programs the function

of the proximity detection. Logic 0 of this bit, Scheme 0, makes

full n (4, 8, 12, 16) bits (unsigned) proximity detection. The range

of Scheme 0 proximity count is from 0 to 2n. Logic 1 of this bit,

Scheme 1, makes n-1 (3, 7, 11, 15) bits (2âs complementary)

proximity_less_ambient detection. The range of Scheme 1

proximity count is from -2(n-1) to 2(n-1). The sign bit is extended

for resolutions less than 16. While Scheme 0 has wider dynamic

range, Scheme 1 proximity detection is less affected by the

ambient IR noise variation.

TABLE 5. PROXIMITY SENSING SCHEME

BIT 7

OPERATION

Sensing IR from LED and ambient

Sensing IR from LED with ambient IR rejection

2. Modulation Frequency; Bit 6: This bit sets the IR LED driverâs

modulation frequency.

TABLE 6. MODULATION FREQUENCY

BIT 6

MODULATION FREQUENCY

(kHz)

360

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FN6467.6

May 1, 2014

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