IQS231A datasheet(21/36 Pages) ETC2

21 / 36 page

ProxSense

® Series

IQS231A Datasheet v1.3

Page 21 of 36

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December 2016

9 Full programming reference

A detailed list of the I

2C registers follows and follows the structure of the memory map

summary on page 8.

ADDR

Bit

Description

xxH

MAIN_EVENTS

n/a

DEBUG

– Debug events are disabled by default. In order to

report debug events, enable debug events in register 0x03 and

read debug event in register 0x02 when this bit is set.

SENSING DISABLED

– An indication of forced or implied times

when no sensing signals are applied to the sense pin. When this

bit is set and bit 2 is cleared, sensing is disabled. When this bit

and bit 2 is set, sensing is enabled again.

WARM BOOT

– A software reset command in register 0x04 will

lead to a warm boot. This will imply a reset for the user

interface, re-calibration, and hand-held power on detection will

be forced if enabled.

COLD BOOT

– A hard reset (power supply cycle) will cause all

registers to return to a default value. This indicator will imply the

need to re-initialize the device.

RELEASE

– A touch, prox or sensing event may be paired with

a release indication to show an exit of the flagged event.

TOUCH

– Disabled by default, this bit will be active when a

touch and prox user interface is chosen.

PROX - The main feedback bit to indicate an activation

00H

PRODUCT_

NUMBER

n/a

The product number is fixed at 0x40

01H

SOFTWARE_

VERSION

n/a

The software version is 0x06 for IQS231A

02H

DEBUG_

EVENTS

n/a

ATI_ERROR

– when a recalibration cannot converge, due to

external tampering or instability, this bit will indicate the error

and implies that the calibration does not offer optimal sensitivity.

The PROX event in the main events register will be set along

with this bit in such case.

CH0_ATI

– An indication that a recalibration of the proximity

sensing channel has occurred. With calibration, the PROX

output in main events will be set and after calibration, the PROX

output will release.

n/a

QUICK RELEASE

– The quick release feature is a single event

that is indicated here. This event will always imply an “ENTER

MOV DETECT”, but is not the only event that causes movement

detection to be activated.

EXIT MOV DETECT

– The user interface dictates when the

movement channel is deactivated. The deactivation of

movement sensing will be reported in this bit.

ENTER MOV DETECT

– Movement detection is user interface

dependant and not continually active. Movement detection

implies that a separate movement channel is activated. This

activation will be reported in this bit.

MOVEMENT

– Each trigger detected by the movement

algorithm is reported as an event that resets along with each

read operation.

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