SX8661 datasheet(73/88 Pages) SEMTECH

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ADVANCED COMMUNICATIONS & SENSING

DATASHEET

Revision v3.2, January 2011

www.semtech.com

SX8661

Low Power, Capacitive Button Touch and Proximity Controller

(8 sensors) with LED Drivers and Analog Output

6.5

Control Registers

Address

Name

Bits

Description

7:3

Reserved*, write only ‘00000’

Compensation

Indicates/triggers compensation procedure

0: Compensation completed (default)

1: read -> compensation running ; write -> trigger

compensation

0x09

CompOpMode

1:0

Operating Mode

Indicates/programs** operating mode

00: Active mode (default)

01: Doze mode

10: Sleep mode

11: Reserved

* The reading of these reserved bits will return varying values.

** After the operating mode change (Active/Doze) the host should wait for INTB or 300ms before

performing any I2C read access.

Table 31

I2C compensation, operation modes

Address

Name

Bits

Description

0x0A

GpoCtrl

7:0

GpoCtrl[7:0]

Triggers ON/OFF state of GPOs when Autolight is OFF

0: OFF (i.e. go to IntensityOff)

1: ON (i.e. go to IntensityOn)

Default is set by SPM parameter GpioOutPwrUp

Bits of non-GPO pins are ignored.

Table 32

I2C GPO Control

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