IQS128L datasheet(7/33 Pages) ETC2

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IQ Switch® ProxSense® Series

IQS128 & IQS128LP Datasheet v2.4

Page 7 of 33

November 2012

3 User Configurable

Options

Table 4.1 and Table 4.2 list the user

configurable settings.

The device is fully functional in its default

state, but some applications may require

alternative configuration settings. These

settings are enabled by configuring One

Time Programmable (OTP) user options.

Configuration can be done on packaged

devices or in-circuit. In-circuit configuration

may be limited by values of external

components chosen.

Popular configurations are available ex-

stock – please check with the local

distributor for availability. Azoteq can

supply pre-configured devices for large

quantities.

3.1 Configuring Devices

Azoteq offers a Configuration Tool (CTxxx)

and

accompanying

software

(USBProg.exe) that can be used to

program

the

OTP

user

options

for

prototyping

purposes.

details

regarding the configuration of the device

with the USBProg program is explained by

application note: “AZD007 – USBProg

Overview” which can be found on the

Azoteq website.

Alternative programming solutions for the

IQS128/IQS128L also exist. For further

enquiries regarding this, please contact

Azoteq at ProxSenseSupport@azoteq.com

or the local distributor.

3.1.1 IQS128 User Selectable Options

Table 3-1:

IQS128

Bank 0 User Selectable Options

Bit

Name

TTHR2

TTHR1

TTHR0

PTHR1

PTHR0

LOGIC

EXT_CTRL

Default

bit 7-5

TTHR<2:0>: Touch Thresholds (counts)

-Section 6.5

000 = 16

001 = 40

010 = 60

011 = 90

100 = 130

101 = 200

110 = 340

111 = 500

bit 4-3

PTHR<1:0>: Proximity Thresholds (counts)

-Section 0

00 = 4

01 = 8

10 = 12

11 = 16

bit 2

ND: RF Noise Detection

-Section 6.3.1

0 = Disable RF Noise Detect

1 = Enable RF Noise Detect

bit 1

LOGIC: Output logic select (Only when STREAMING mode is disabled)

-Section 6.7

0 =

1Software Open Drain Active Low

1 = Active High

bit 0

EXT_CTRL: Selects external control option on OUT

-Section 6.1

0 = Charge Halt

1 = Halt LTA filter

1 Only applicable for OUT pin. If CTRL is configured as output, it is a push-pull output.

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