ASR8600

PRELIMINARY

(March, 2015, Version 0.0)

5

AMIC Technology Corp.

Interrupt Function

The ASR8600 has an intelligent interrupt scheme designed

for light and PS sensing. The active low interrupt pin is an

open drain pull-down configuration. The interrupt pin serves

as an alarm or monitoring function to determine whether the

ambient light or PS data exceeds the upper threshold or

goes below the lower threshold. The user can also configure

the persistency for the interrupt to eliminate any false

triggers, such as noise or sudden spikes in ambient light

conditions. The user uses 0x00[3:0] to identify which

interrupt status, light sensing or PS one, is raised.

System Operation State

The ASR8600 provides control of ambient light (ALS), IR

light, Solar-UV, proximity sensing (PS) detection, and power

management through an internal state machine. After a

power on reset, the device is in standby mode. As soon as

any of light or PS sensing bit is enable, the device will move

to the start state, and then it will continue through PS/UV,

wait, and ALS/IR states.

If any Write command is executed during sensing in

operation, then the device will interrupt the sensing process

and move back to standby stage. It will then restart the

process according the new writing conditions.

Regarding the enable setting of PS/UV and ALS/IR,

customer can refer to the register 0x01 configuration.

VDD Power-up and Power Supply Considerations

Upon power-up, a VDD slew rate of 0.5V/ms or greater is

preferable. After power-up, or if the user’s power supply is

temporarily fluctuated by unknown noise causing system

abnormal, AMIC recommends the user to issue a soft reset

command 0x5B with data 0xB5, and then rewrite all

registers to the desired values. If the user prefers a

hardware reset method instead of soft reset, please set

VDD = 0V for 1 second or more, and then power up at the

required slew rate.

PS/UV_EN=1

ALS/IR_EN=0

PS/UV_EN=0 &

ALS/IR_EN=1

ALS/IR_EN=1

ADC_OK

ADC_OK

STANDBY

ALS/IR/UV/PS_EN=1

ALS&IR&UV&PS_EN=0

1. Power on or any Write execution

2. Update Write information

START

WAIT

ALS/IR

PS/UV