TMD2671

DIGITAL PROXIMITY DETECTOR

TAOS144B − SEPTEMBER 2012

8

r

r

Copyright

E 2012, TAOS Inc.

The LUMENOLOGY

r Company

www.taosinc.com

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

Start

Wait

Prox

PON = 1 (r 0:b0)

PON = 0 (r 0:b0)

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 0, bit 0. This is represented as PON (r0:b0).