ASR8600 Datasheet, PDF (6/14 Pages) AMIC Technology – Ambient Light, Solar-UV, IR and Proximity Sensor

ASR8600
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.
STANDBY
1. Power on or any Write execution
2. Update Write information
ALS/IR/UV/PS_EN=1
ALS&IR&UV&PS_EN=0
PS/UV_EN=1
START
ADC_OK
ALS/IR_EN=0
PS/UV
PS/UV_EN=0 &
ALS/IR_EN=1
ADC_OK
WAIT
ALS/IR
ALS/IR_EN=1
PRELIMINARY (March, 2015, Version 0.0)
5
AMIC Technology Corp.