���������������������������������������������������������������� Maxim Integrated Products 11

MAX44005

RGB Color, Temperature,

and Infrared Proximity Sensor

The individual register bits are explained below. Default power-up bit states are highlighted in bold.

Interrupt Status (0x00)

The AMBINTS bit in the Status register 0x00 is read only and indicates that an ambient light interrupt condition has

occurred. If any of these bits (PWRON, PRXINTS, AMBINTS) is set to 1, the INT pin is pulled low. The PRXINTS bit in

the Status register 0x00 is read only and indicates that a proximity receive interrupt condition has occurred. PWRON

bit in the Status register 0x00 is read only, and if set, indicates that a power-on-reset condition has occurred, and any

user-programmed thresholds may not be valid anymore. The SHDN bit in the Status register 0x00 is read/write and can

be used to put the part into and bring out of shutdown for power saving. All register data is retained during this opera-

tion. The RESET bit in the Status register 0x00 is also read/write and can be used to reset all of the registers back to

power-on default condition.

Reading the Interrupt Status register clears the PWRON, PRXINTS and AMBINTS bits, and if set, deasserts the INT pin

(INT pin is pulled high by the off-chip pullup resistor). The PRXINTS and AMBINTS bits are disabled and set to 0 if the

respective interrupt enable bits in Register 0x01 are set to 0.

Table 1. Ambient Interrupt Status Flag (AMBINTS)

Table 2. Proximity Receive Interrupt Status Flag (PRXINTS)

Table 3. Power-On Interrupt Status Flag (PWRON)

REGISTER

BIT7

BIT6

BIT5

BIT4

BIT3

BIT2

BIT1

BIT0

REGISTER

ADDRESS

POWER-

ON

RESET

STATE

R/W

Interrupt Status

RESET

SHDN

PWRON PRXINTS AMBINTS

0x00

0x04

R/W

BIT0

OPERATION

0

No interrupt trigger event has occurred.

1

The ambient light has exceeded the designated window limits defined by threshold registers for longer than persist

timer count AMBPST[1:0]. It also causes the INT pin to be pulled low. Once set, the only way to clear this bit is to

read this register. This bit is always set to 0 if AMBINTE bit is set to 0.

BIT1

OPERATION

0

No interrupt trigger event has occurred.

1

The IR proximity receive intensity has exceeded the proximity threshold limit for longer than persist timer count

PRXPST[1:0]. It also causes the INT pin to be pulled low. Once set, the only way to clear this bit is to read this regis-

ter. This bit is always set to 0 if PRXINTE bit is set to 0.

BIT2

OPERATION

0

Normal operating mode.

1

The part went through a power-up event, either because the part was turned on or because there was a power-

supply voltage glitch. All interrupt threshold settings in the registers have been reset to power-on-default states and

should be examined if necessary. The INT pin is also pulled low. Once this bit is set, the only way to clear this bit is

to read this register.