(1) This pin is reserved for WLAN antenna selection, controlling an external RF switch that multiplexes the RF pin of the CC3230x device between two antennas. These pins must not be used for other functionalities.

(2) This pin has dual functions: as a SOP[2] (device operation mode), and as an external TCXO enable. As a TXCO enable, the pin is an output on power up and driven logic high. During hibernate low-power mode, the pin is in a Hi-Z state but is pulled down for SOP mode to disable TCXO. Because of the SOP functionality, the pin must be used as an output only.

(3) Device firmware automatically enables the digital path during ROM boot.

(4) Pin 45 is used by an internal DC/DC converter (ANA2_DCDC). This pin will be available automatically if the serial flash is forced in the CC3230SF device. For the CC3230S devices, pin 45 can be used as GPIO_31 if a supply is provided on pin 47.

(5) Pin 52 is used by the RTC crystal oscillator. These devices use automatic configuration sensing. Therefore, some board-level configuration is required to use pin 52 as a digital pad. Pin 52 is used for the RTC crystal in most applications. However, in some applications a 32.768-kHz square-wave clock might always be available onboard. When a 32.768-kHz square-wave clock is available, the crystal can be removed to free pin 52 for digital functions. The external clock must then be applied at pin 51. For the device to automatically detect this configuration, a 100-kΩ pullup resistor must be connected between pin 52 and the supply line. To prevent false detection, TI recommends using pin 52 for output-only functions.

(6) This pin is shared by the ADC inputs and digital I/O pad cells.

(7) To use the digital functions, RTC_XTAL_N must be pulled high to the supply voltage using a 100-kΩ resistor.

(8) Requires user configuration to enable the analog switch of the ADC channel (the switch is off by default.) The digital I/O is always connected and must be made Hi-Z before enabling the ADC switch.

(1) Signals names with (PN) denote the default pin name.

(2) Signal Types: I = Input, O = Output, I/O = Input or Output.

(3) LPDS state: Unused I/Os are in a Hi-Z state. Software may program the I/Os to be input with pull or drive (regardless of active pin configuration), according to the need.

(4) Hibernate mode: The I/Os are in a Hi-Z state. Software may program the I/Os to be input with pull or drive (regardless of active pin configuration), according to the need.

(5) To minimize leakage in some serial flash vendors during LPDS, TI recommends that the user application always enables internal weak pulldown resistors on the FLASH_SPI_DIN, FLASH_SPI_DOUT, and FLASH_SPI_CLK pins.

(6) This pin has dual functions: as a SOP[2] (device operation mode), and as an external TCXO enable. As a TXCO enable, the pin is an output on power up and driven logic high. During hibernate low-power mode, the pin is in a Hi-Z state but is pulled down for SOP mode to disable TCXO. Because of the SOP functionality, the pin must be used as an output only.

(7) Pin 45 is used by an internal DC/DC (ANA2_DCDC). For the CC3230S device, pin 45 can be used as GPIO_31 if a supply is provided on pin 47.

(8) For details on proper use, see Section 7.5.

(9) This pin is one of three that must have a passive pullup or pulldown resistor onboard to configure the device hardware power-up mode. For this reason, the pin must be output only when used for digital functions.

(10) Pin 52 is used by the RTC crystal oscillator. These devices use automatic configuration sensing. Therefore, some board-level configuration is required to use pin 52 as a digital pad. Pin 52 is used for RTC crystal in most applications. However, in some applications a 32.768-kHz square-wave clock might always be available onboard. When a 32.768-kHz square-wave clock is available, the crystal can be removed to free pin 52 for digital functions. The external clock must then be applied at pin 51. For the chip to automatically detect this configuration, a 100-kΩ pullup resistor must be connected between pin 52 and the supply line. To prevent false detection, TI recommends using pin 52 for output-only functions.

(11) This pin is shared by the ADC inputs and digital I/O pad cells.

(12) This pin is reserved for WLAN antenna selection, controlling an external RF switch that multiplexes the RF pin of the CC3230x device between two antennas. These pins must not be used for other functionalities.