SWAS034A February 2017 – May 2021 CC3120
The external serial Flash stores the user profiles and firmware patch updates. The CC3120R device acts as a master in this case; the SPI serial Flash acts as the slave device. This interface can work up to a speed of 20 MHz.
Figure 8-15 shows the SPI Flash interface.
Section 184.108.40.206 lists the SPI Flash interface pins.