SX8645I05AWLTRT Semtech, SX8645I05AWLTRT Datasheet - Page 33

• Manufacturer Part Number: SX8645I05AWLTRT
• Description: 12-ch Capacitive Touch Solution (Button & Wheel)
• Manufacturer: Semtech

ADVANCED COMMUNICATIONS & SENSING
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.
Revision 7_5, February 10
to host
R_INT
Figure 36
VDD
Figure 37
Touch Controller (12 sensors) with Enhanced LED Drivers
© 2010 Semtech Corp.
Simplified diagram of CN and CP
SX8645
Simplified diagram of INTB
CN
CP
SX8645
INTB
33
Ultra Low Power, Capacitive Button and Wheel
VANA
VANA
INT
ASI
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SX8645