sx8638 Semtech Corporation, sx8638 Datasheet - Page 37

• Manufacturer Part Number: sx8638
• Description: Low Power, Capacitive Button And Slider Touch Controller 8 Sensors With Enhanced Led Drivers And Proximity
• Manufacturer: Semtech Corporation

ADVANCED COMMUNICATIONS & SENSING
VANA, VDIG
The SX8638 has on-chip regulators for internal use (pins VANA and VDIG).
VANA and VDIG have protection to VDD and to GND.
The output of the regulators needs to be de-coupled with a small 100nF capacitor to ground.
Figure 44 shows a simplified diagram of the VANA and VDIG pin.
4.5 General purpose IO pins
The SX8638 has 8 General purpose input/output (GPIO) pins.
All the GPIO pins have protection to VDD and GND.
The GPIO pins can be configured as GPI, GPO or GPP.
Figure 45 shows a simplified diagram of the GPIO pins.
Revision 7_6, September 10
Figure 44
Cvana
Cvdig
Figure 45
GND
GND
Simplified diagram of VANA and VDIG
© 2010 Semtech Corp.
VANA
VDIG
Simplified diagram of GPIO pins
Low Power, Capacitive Button and Slider Touch Controller
(8 sensors) with Enhanced LED Drivers and Proximity
SX8638
37
VDD
VDD
VDIG
VANA
DATASHEET
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SX8638