sx8661 Semtech Corporation, sx8661 Datasheet - Page 39

• Manufacturer Part Number: sx8661
• Description: Low Power, Capacitive Button Touch And Proximity Controller 8 Sensors With Led Drivers And Analog Output
• Manufacturer: Semtech Corporation

ADVANCED COMMUNICATIONS & SENSING
SCL
The SCL pin is a high impedance input pin. The SCL pin is protected to VDD, using dedicated devices, in order to
conform to standard I2C slave specifications. The SCL pin has diode protected to GROUND.
An external pull-up resistor (1..10 kOhm) is required on this pin.
Figure 44 shows the simplified diagram of the SCL pin.
SDA
SDA is an IO pin that can be used as an open drain output pin with external pull-up resistor or as a high
impedance input pin. The SDA IO pin is protected to VDD, using dedicated devices, in order to conform to
standard I2C slave specifications. The SDA pin has diode protected to GROUND.
An external pull-up resistor (1..10 kOhm) is required on this pin.
Figure 45 shows the simplified diagram of the SDA pin.
Revision v3.2, January 2011
from host
from/ to host
R_ SCL
R_ SDA
VDD
VDD
Figure 45
Figure 44
Low Power, Capacitive Button Touch and Proximity Controller
© 2011 Semtech Corp.
Simplified diagram of SDA
Simplified diagram of SCL
SX8661
SX8661
SCL
SDA
39
(8 sensors) with LED Drivers and Analog Output
SCL_IN
SDA_OUT
SDA_IN
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SX8661