11

Maxim Integrated

MAX44006/MAX44008

RGB Color, Infrared, and Temperature Sensors

The individual register bits are explained below.

Interrupt Status (0x00)

The AMBINTS bit in the Interrupt Status register 0x00 is a read-only bit, and indicates that an ambient light-interrupt

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

in the Interrupt Status register 0x00 is a read-only bit, and if set, indicates that a power-on-reset (POR) condition has

occurred, and any user-programmed thresholds may not be valid anymore. The SHDN bit in the Interrupt Status register

0x00 is a read/write bit, and can be used to put the part into and bring out of shutdown for power saving. All register

data is retained during this operation. The RESET bit in the Interrupt Status register 0x00 is also a read/write bit, and

can be used to reset all the registers back to a power-on default condition.

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

pulled high by the off-chip pullup resistor). The AMBINTS bits are disabled and set to 0 if the respective INTE Interrupt

Enable bits in Register 0x01 are set to 0.

Table 1. Ambient INTERRUPT STATUS Flag (AMBINTS)

Table 3. Shutdown Control (SHDN)

Table 2. 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

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 the 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.

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.

BIT3

OPERATION

0

The part is in normal operation. When the part returns from shutdown, note that the value in data registers is not current

until the first conversion cycle is completed.

1

The part can be put into a power-save mode by writing a 1 to this bit. Supply current is reduced to approximately

retain data, ADC conversion data contained in them may not be current. Writeable registers also remain accessible in

shutdown. All interrupts are cleared.