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SX8661 데이터시트(PDF) 12 Page - Semtech Corporation

부품명 SX8661
상세설명  Low Power, Capacitive Button Touch and Proximity Controller
PDF  88 Pages
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제조업체  SEMTECH [Semtech Corporation]
홈페이지  http://www.semtech.com
Logo SEMTECH - Semtech Corporation

SX8661 데이터시트(HTML) 12 Page - Semtech Corporation

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ADVANCED COMMUNICATIONS & SENSING
DATASHEET
Revision v3.2, January 2011
© 2011 Semtech Corp.
www.semtech.com
12
SX8661
Low Power, Capacitive Button Touch and Proximity Controller
(8 sensors) with LED Drivers and Analog Output
3
FUNCTIONAL DESCRIPTION
3.1
Quickstart Application
The SX8661 is preconfigured (Quickstart Application) for an application requiring proximity and seven buttons,
with one Analog Output Interface and seven LED drivers using PWM fading. Table 7 summarises the default
configuration of the eight GPIOs available on the SX8661 Quickstart application.
GPIO
Function
Fading Mode
Comments
0
LED
Single Fading Mode
Autolight, mapped on Btn1 (100% ON) and proximity (50% ON)
1
LED
Single Fading Mode
Autolight, mapped on Btn2 (100% ON) and proximity (50% ON)
2
LED
Single Fading Mode
Autolight, mapped on Btn3 (100% ON) and proximity (50% ON)
3
LED
Single Fading Mode
Autolight, mapped on Btn4 (100% ON) and proximity (50% ON)
4
LED
Single Fading Mode
Autolight, mapped on Btn5 (100% ON) and proximity (50% ON)
5
LED
Single Fading Mode
Autolight, mapped on Btn6 (100% ON) and proximity (50% ON)
6
LED
Single Fading Mode
Autolight, mapped on Btn7 (100% ON) and proximity (50% ON)
7
AOI-A
Not applicable
Analog Output Interface A (VDD=3.3V)
Prox = Idle : 3.3V
Btn1: 0.6V
Btn2: 0.9V
Btn3: 1.2V
Btn4: 1.5V
Btn5: 1.8V
Btn6: 2.1V
Btn7: 2.4V
Table 7
Quickstart Application GPIO configuration
Implementing a schematic based on Figure 6 will be immediately operational after powering without programming
the SX8661 (even without host).
The default sensitivity is set to 0x02 for all button sensors (assumed button sensor area approximately 1 cm
2
covered by 2mm thick acrylic overlay material) and 0x07 for the proximity sensor (typical 4 x 8 cm
2).
Figure 6
Quickstart Application



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