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16.8.6 Sense on Power CC3200 implements a sense on power scheme. By using a few board level pull resistors CC3200 can be configured by the user to power up in one of the three following modes:
1. Fn4WJ: Functional Mode with 4-wire JTAG mapped to fixed pins 2. Fn2WJ: Functional Mode with 2-wire SWD mapped to fixed pins 3. LDfrUART : UART Load Mode for flashing the system during development and in OEM assembly line (eg: serial flash connected to CC3200R) Sense on Power (SoP) values are sensed from the device pin during power up. This encoding determines the boot flow as well as the default mapping for some of the pins (JTAG, SWD, UART0). Three SoP pins are used for this purpose. Before the device is taken out of reset, the SoP values are made available on a register and determine the device character while powering up. Table 16-13 shows the pull configurations.
