sx8643 Semtech Corporation, sx8643 Datasheet - Page 35

• Manufacturer Part Number: sx8643
• Description: Ultra Low Power, Capacitive Button Touch Controller 12 Sensors With Enhanced Led Drivers
• Manufacturer: Semtech Corporation

ADVANCED COMMUNICATIONS & SENSING
VANA, VDIG
The SX8643 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 39 shows a simplified diagram of the VANA and VDIG pin.
4.5 General purpose IO pins
The SX8643 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 40 shows a simplified diagram of the GPIO pins.
Revision 7_5, February 10
Figure 39
Cvana
Cvdig
Figure 40
GND
GND
Simplified diagram of VANA and VDIG
© 2010 Semtech Corp.
VANA
VDIG
Simplified diagram of GPIO pins
Ultra Low Power, Capacitive Button Touch Controller
SX8643
35
VDD
VDD
VDIG
VANA
(12 sensors) with Enhanced LED Drivers
DATASHEET
www.semtech.com
SX8643