SX8661I07AULTRT Semtech, SX8661I07AULTRT Datasheet - Page 12

• Manufacturer Part Number: SX8661I07AULTRT
• Description: IC, Capacitive Button Touch And Proximity Controller, 8 SENSOR, MLPQ-28
• Manufacturer: Semtech

Specifications of SX8661I07AULTRT

• Controller Type: Capacitive Touch Screen
• Ic Interface Type: I2C
• Supply Voltage Range: 2.7V To 3.6V
• Operating Temperature Range: -40°C To +85°C

ADVANCED COMMUNICATIONS & SENSING
3 F
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
0
1
2
3
4
5
6
7
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
covered by 2mm thick acrylic overlay material) and 0x07 for the proximity sensor (typical 4 x 8 cm
Revision v3.2, January 2011
UNCTIONAL DESCRIPTION
Function Fading Mode
LED
LED
LED
LED
LED
LED
LED
AOI-A
Single Fading Mode
Single Fading Mode
Single Fading Mode
Single Fading Mode
Single Fading Mode
Single Fading Mode
Single Fading Mode
Not applicable
Table 7
Quickstart Application GPIO configuration
Low Power, Capacitive Button Touch and Proximity Controller
Figure 6
© 2011 Semtech Corp.
Comments
Autolight, mapped on Btn1 (100% ON) and proximity (50% ON)
Autolight, mapped on Btn2 (100% ON) and proximity (50% ON)
Autolight, mapped on Btn3 (100% ON) and proximity (50% ON)
Autolight, mapped on Btn4 (100% ON) and proximity (50% ON)
Autolight, mapped on Btn5 (100% ON) and proximity (50% ON)
Autolight, mapped on Btn6 (100% ON) and proximity (50% ON)
Autolight, mapped on Btn7 (100% ON) and proximity (50% ON)
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
Quickstart Application
12
(8 sensors) with LED Drivers and Analog Output
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