SWRS215D April 2019 – May 2021 CC3235S , CC3235SF
PRODUCTION DATA
The device makes extensive use of pin multiplexing to accommodate the large number of peripheral functions in the smallest possible package. To achieve this configuration, pin multiplexing is controlled using a combination of hardware configuration (at device reset) and register control.
TI highly recommends using the Pin Mux Tool to obtain the desired pinout. In addition refer to the user guide within the SimpleLink™ CC32XX Software Development Kit (SDK)
The board and software designers are responsible for the proper pin multiplexing configuration. Hardware does not ensure that the proper pin multiplexing options are selected for the peripherals or interface mode used.
Table 7-1 and Table 7-2 list the pin descriptions and attributes. Table 7-3 lists the signal descriptions. Table 7-4 presents an overall view of pin multiplexing. All pin multiplexing options are configurable using the pin mux registers.
The following special considerations apply:
If an external device drives a positive voltage to the signal pads and the CC3235x device is not powered, DC is drawn from the other device. If the drive strength of the external device is adequate, an unintentional wakeup and boot of the CC3235x device can occur. To prevent current draw, TI recommends any one of the following conditions:
The ADC inputs are tolerant up to 1.8 V (see Table 8-30 for more details about the usable range of the ADC). On the other hand, the digital pads can tolerate up to 3.6 V. Hence, take care to prevent accidental damage to the ADC inputs. TI recommends first disabling the output buffers of the digital I/Os corresponding to the desired ADC channel (that is, converted to Hi-Z state), and thereafter disabling the respective pass switches (S7 [Pin 57], S8 [Pin 58], S9 [Pin 59], and S10 [Pin 60]). For more information, see Section 7.5.