IQS128L datasheet(21/33 Pages) ETC2

21 / 33 page

IQ Switch® ProxSense® Series

IQS128 & IQS128L Datasheet v2.4

Page 21 of 33

November 2012

9 DYCAL Specific settings

9.1 REL_TTHR: Release Threshold

(IQS128L)

The IQS128L has the option to increase the

release threshold when in TM. This helps

that small variations caused by moving a

finger/hand on a touch pad will not cause the

IC to exit TM, making the solution more

robust. The options available are shown

below:

Configuration: Bank2 bit4: REL_TTHR

Bit

Selection

75%

87.5%

9.2 DYCAL_OUTPUT (IQS128L)

The IQS128L can be configured to activate

the OUT pin with either a proximity event or

a touch event.

Choosing a proximity event, will make the

activation of OUT more sensitive.

Using a touch event to activate OUT will

make the system less sensitive which is

needed in some applications. The LTA will

still halt with the detection of a proximity but

will not have an influence on the OUT pin.

The LTA will still re-calibrate once a touch

condition is detected.

Configuration: Bank2 bit5:DYCAL_OUTPUT

Bit

Selection

Proximity

Touch

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