SWRS243B February 2020 – May 2021 CC3235MODAS , CC3235MODASF , CC3235MODS , CC3235MODSF
Refer to the PDF data sheet for device specific package drawings
The CC3235MODx and CC3235MODAx MCU implements a sense-on-power (SoP) scheme to determine the device operation mode.
SoP values are sensed from the module pin during power up. This encoding determines the boot flow. Before the device is taken out of reset, the SoP values are copied to a register and used to determine the device operation mode while powering up. These values determine the boot flow as well as the default mapping for some of the pins (JTAG, SWD, UART0). Table 9-5 lists the pull configurations.
All CC3235MODx and CC3235MODAx MCUs contain internal pulldown resistors on the SOP[2:0] lines. The application can use SOP2 for other functions after chip has powered up. However, to avoid spurious SOP values from being sensed at power up, TI strongly recommends using the SOP2 pin only for output signals. The SOP0 and SOP1 pins are multiplexed with the WLAN analog test pins and are not available for other functions.
|UARTLOAD||Pullup||Pulldown||Pulldown||LDfrUART||Factory, lab flash, and SRAM loads through the UART. The device waits indefinitely for the UART to load code. The SOP bits then must be toggled to configure the device in functional mode. Also puts JTAG in 4-wire mode.|
|FUNCTIONAL_2WJ||Pulldown||Pulldown||Pullup||Fn2WJ||Functional development mode. In this mode, 2-pin SWD is available to the developer. TMS and TCK are available for debugger connection.|
|FUNCTIONAL_4WJ||Pulldown||Pulldown||Pulldown||Fn4WJ||Functional development mode. In this mode, 4-pin JTAG is available to the developer. TDI, TMS, TCK, and TDO are available for debugger connection. The default configuration for CC3235MODx and CC3235MODAx MCUs.|
|UARTLOAD_FUNCTIONAL_4WJ||Pulldown||Pullup||Pulldown||LDfrUART_FnWJ||Supports flash and SRAM load through UART and functional mode. The MCU bootloader tries to detect a UART break on UART receive line. If the break signal is present, the device enters the UARTLOAD mode, otherwise, the device enters the functional mode. TDI, TMS, TCK, and TDO are available for debugger connection.|
|RET_FACTORY_IMAGE||Pulldown||Pullup||Pullup||RetFactDef||When module reset is toggled, the MCU bootloader kickstarts the procedure to restore factory default images.|