SX8644I05AWLTRT Semtech, SX8644I05AWLTRT Datasheet - Page 33

• Manufacturer Part Number: SX8644I05AWLTRT
• Description: 12-ch Capacitive Touch Solution (Button & Slider)
• Manufacturer: Semtech

SX8644
Ultra Low Power, Capacitive Button and Slider
Touch Controller (12 sensors) with Enhanced LED Drivers
WIRELESS & SENSING
DATASHEET
SX8644
VANA
CP
ASI
VANA
CN
Simplified diagram of CN and CP
Figure 36
4.3 Host interface pins
The host interface consists of the interrupt pin INTB, a reset pin RESETB and the standard I2C pins: SCL and
SDA.
INTB
The INTB pin is an open drain output that requires an external pull-up resistor (1..10 kOhm). The INTB pin is
protected to VDD using dedicated devices. The INTB pin has diode protected to GROUND.
Figure 37 shows a simplified diagram of the INTB pin.
VDD
SX8644
R_INT
INTB
to host
INT
Simplified diagram of INTB
Figure 37
Revision 7_6, October 12
© 2012 Semtech Corp.
www.semtech.com
33