CC3120 Datasheet, PDF (26/57 Pages) Texas Instruments – SimpleLink Wi-Fi Wireless Network Processor Internet-of-Things Solution for MCU Applications

CC3120
SWAS034 – FEBRUARY 2017
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4.14 External Interfaces
4.14.1 SPI Flash Interface
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 4-15 shows the SPI flash interface.
CC3120R (master)
Serial flash
FLASH_SPI_CLK
FLASH_SPI_CS
FLASH_SPI_MISO
FLASH_SPI_MOSI
SPI_CLK
SPI_CS
SPI_MISO
SPI_MOSI
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Figure 4-15. SPI Flash Interface
Table 4-12 lists the SPI flash interface pins.
PIN NAME
FLASH_SPI_CLK
FLASH_SPI_CS
FLASH_SPI_MISO
FLASH_SPI_MOSI
Table 4-12. SPI Flash Interface
DESCRIPTION
Clock (up to 20 MHz) CC3120R device to serial flash
CS signal from CC3120R device to serial flash
Data from serial flash to CC3120R device
Data from CC3120R device to serial flash
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Specifications
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