SX8661Z datasheet(63/87 Pages) SEMTECH

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ADVANCED COMMUNICATIONS & SENSING

DATASHEET

Revision v4.0, February 2016

www.semtech.com

SX8661Z

Low Power, Capacitive Button Touch and Proximity Controller

(8 sensors) with LED Drivers and Analog Output

GPIO Parameters

Address

Name

Bits Description

1: Normal

0x59

GpioFunction

7:0

Defines the intensity index vs PWM pulse width function.

0: Logarithmic

1: Linear

0x5A

GpioIncFactor

7:0

Defines the fading increment factor.

0: intensity index incremented every increment time

1: intensity index incremented every 16 increment times

0x5B

GpioDecFactor

7:0

Defines the fading decrement factor.

0: intensity index decremented every decrement time

1: intensity index decremented every 16 decrement times

0x5C

GpioIncTime7_6

7:4

GPIO[7] Fading Increment Time

Defines the fading increment time.

0x0: OFF

0x1: 0.5ms

0x2: 1ms

…

0xF: 7.5ms

The total fading in time will be:

GpioIncTime*GpioIncFactor*

(GpioIntensityOn – GpioIntensityOff)

3:0

GPIO[6] Fading Increment Time

0x5D

GpioIncTime5_4

7:4

GPIO[5] Fading Increment Time

3:0

GPIO[4] Fading Increment Time

0x5E

GpioIncTime3_2

7:4

GPIO[3] Fading Increment Time

3:0

GPIO[2] Fading Increment Time

0x5F

GpioIncTime1_0

7:4

GPIO[1] Fading Increment Time

3:0

GPIO[0] Fading Increment Time

0x60

GpioDecTime7_6

7:4

GPIO[7] Fading Decrement Time

Defines the fading decrement time.

0x0: OFF

0x1: 0.5ms

0x2: 1ms

…

0x4: 2.0ms

…

0xF: 7.5ms

The total fading out time will be:

GpioDecTime*GpioDecFactor*

(GpioIntensityOn – GpioIntensityOff)

3:0

GPIO[6] Fading Decrement Time

0x61

GpioDecTime5_4

7:4

GPIO[5] Fading Decrement Time

3:0

GPIO[4] Fading Decrement Time

0x62

GpioDecTime3_2

7:4

GPIO[3] Fading Decrement Time

3:0

GPIO[2] Fading Decrement Time

0x63

GpioDecTime1_0

7:4

GPIO[1] Fading Decrement Time

3:0

GPIO[0] Fading Decrement Time

0x64

GpioOffDelay7_6

7:4

GPIO[7] OFF Delay

Single Fading Mode

Defines the delay between release and start

of fading out.

0x0: instantaneous

0x1: 200 ms

0x2: 400 ms

0x3: 600ms

…

0xA: 2s

0xB: 4s

…

0xF: 12s

3:0

GPIO[6] OFF Delay

0x65

GpioOffDelay5_4

7:4

GPIO[5] OFF Delay

3:0

GPIO[4] OFF Delay

0x66

GpioOffDelay3_2

7:4

GPIO[3] OFF Delay

3:0

GPIO[2] OFF Delay

0x67

GpioOffDelay1_0

7:4

GPIO[1] OFF Delay

3:0

GPIO[0] OFF Delay

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