TMD2725 Datasheet, PDF (13/50 Pages) ams AG – The device features advanced proximity measurement

TMD2725 − Principles of Operation
Principles of Operation
System State Machine
An internal state machine provides system control of the ALS,
proximity detection, and power management features of the
device. At power up, an internal power-on-reset initializes the
device and puts it in a lowpower Sleep state. When a write on
I²C bus to the Enable register (0x80) PON bit is set, the device
transitions to the Idle state. If PON is disabled, the device will
return to the Sleep state to save power. Otherwise, the device
will remain in the Idle state until a Proximity or ALS function is
enabled. Once enabled, the device will execute the ALS,
Proximity and Wait states in sequence as indicated in Figure 18
and Figure 19. Upon completion, the device will automatically
begin a new ALS-Prox-Wait cycle as long as PON and either PEN
or AEN remain enabled. If the Prox or ALS function generates
an interrupt and the Sleep-After-Interrupt (SAI) feature is
enabled, the device will transition to the Sleep state and remain
in a low-power mode until an I²C command is received clearing
the interrupts in the STATUS register. See Interrupts for
additional information.
ams Datasheet
[v1-11] 2016-Sep-20
Page 13
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