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TSL2671
DIGITAL PROXIMITY DETECTOR
TAOS118 ? JANUARY 2011
PRINCIPLES OF OPERATION
System State Machine
The device provides control of proximity detection and power management functionality through an internal
state machine. After a power-on-reset, the device is in the sleep mode. As soon as the PON bit is set, the device
will move to the start state. It will then cycle through the Proximity and Wait states. If these states are enabled,
the device will execute each function. If the PON bit is set to a 0, the state machine will continue until the current
conversion is complete and then go into a low-power sleep mode.
Sleep
PON = 1
(r0x00:b0)
Prox
Start
PON = 0
(r0x00:b0)
Wait
Figure 5. Simplified State Diagram
NOTE: In this document, the nomenclature uses the bit field name in italics followed by the register number and
bit number to allow the user to easily identify the register and bit that controls the function. For example, the
power on (PON) is in register 0x00, bit 0. This is represented as PON (r0x00:b0) .
The LUMENOLOGY r Company
r
www.taosinc.com
r
Copyright E 2011, TAOS Inc.
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